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Author SHA1 Message Date
Srikar Dronamraju 6fd98e775f sched/numa: Avoid task migration for small NUMA improvement
If NUMA improvement from the task migration is going to be very
minimal, then avoid task migration.

Specjbb2005 results (8 warehouses)
Higher bops are better

2 Socket - 2  Node Haswell - X86
JVMS  Prev    Current  %Change
4     198512  205910   3.72673
1     313559  318491   1.57291

2 Socket - 4 Node Power8 - PowerNV
JVMS  Prev     Current  %Change
8     74761.9  74935.9  0.232739
1     214874   226796   5.54837

2 Socket - 2  Node Power9 - PowerNV
JVMS  Prev    Current  %Change
4     180536  189780   5.12031
1     210281  205695   -2.18089

4 Socket - 4  Node Power7 - PowerVM
JVMS  Prev     Current  %Change
8     56511.4  60370    6.828
1     104899   108100   3.05151

1/7 cases is regressing, if we look at events migrate_pages seem
to vary the most especially in the regressing case. Also some
amount of variance is expected between different runs of
Specjbb2005.

Some events stats before and after applying the patch.

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        13,818,546      13,801,554
migrations                1,149,960       1,151,541
faults                    385,583         433,246
cache-misses              55,259,546,768  55,168,691,835
sched:sched_move_numa     2,257           2,551
sched:sched_stick_numa    9               24
sched:sched_swap_numa     512             904
migrate:mm_migrate_pages  2,225           1,571

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        72692   113682
numa_hint_faults_local  62270   102163
numa_hit                238762  240181
numa_huge_pte_updates   48      36
numa_interleave         75      64
numa_local              238676  240103
numa_other              86      78
numa_pages_migrated     2225    1564
numa_pte_updates        98557   134080

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        3,173,490       3,079,150
migrations                36,966          31,455
faults                    108,776         99,081
cache-misses              12,200,075,320  11,588,126,740
sched:sched_move_numa     1,264           1
sched:sched_stick_numa    0               0
sched:sched_swap_numa     0               0
migrate:mm_migrate_pages  899             36

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        21109   430
numa_hint_faults_local  17120   77
numa_hit                72934   71277
numa_huge_pte_updates   42      0
numa_interleave         33      22
numa_local              72866   71218
numa_other              68      59
numa_pages_migrated     915     23
numa_pte_updates        42326   0

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before       After
cs                        8,312,022    8,707,565
migrations                231,705      171,342
faults                    310,242      310,820
cache-misses              402,324,573  136,115,400
sched:sched_move_numa     193          215
sched:sched_stick_numa    0            6
sched:sched_swap_numa     3            24
migrate:mm_migrate_pages  93           162

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        11838   8985
numa_hint_faults_local  11216   8154
numa_hit                90689   93819
numa_huge_pte_updates   0       0
numa_interleave         1579    882
numa_local              89634   93496
numa_other              1055    323
numa_pages_migrated     92      169
numa_pte_updates        12109   9217

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before      After
cs                        2,170,481   2,152,072
migrations                10,126      10,704
faults                    160,962     164,376
cache-misses              10,834,845  3,818,437
sched:sched_move_numa     10          16
sched:sched_stick_numa    0           0
sched:sched_swap_numa     0           7
migrate:mm_migrate_pages  2           199

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        403     2248
numa_hint_faults_local  358     1666
numa_hit                25898   25704
numa_huge_pte_updates   0       0
numa_interleave         207     200
numa_local              25860   25679
numa_other              38      25
numa_pages_migrated     2       197
numa_pte_updates        400     2234

perf stats 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before           After
cs                        110,339,633      93,330,595
migrations                4,139,812        4,122,061
faults                    863,622          865,979
cache-misses              231,838,045,660  225,395,083,479
sched:sched_move_numa     2,196            2,372
sched:sched_stick_numa    33               24
sched:sched_swap_numa     544              769
migrate:mm_migrate_pages  2,469            1,677

vmstat 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        85748   91638
numa_hint_faults_local  66831   78096
numa_hit                242213  242225
numa_huge_pte_updates   0       0
numa_interleave         0       2
numa_local              242211  242219
numa_other              2       6
numa_pages_migrated     2376    1515
numa_pte_updates        86233   92274

perf stats 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before          After
cs                        59,331,057      51,487,271
migrations                552,019         537,170
faults                    266,586         256,921
cache-misses              73,796,312,990  70,073,831,187
sched:sched_move_numa     981             576
sched:sched_stick_numa    54              24
sched:sched_swap_numa     286             327
migrate:mm_migrate_pages  713             726

vmstat 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        14807   12000
numa_hint_faults_local  5738    5024
numa_hit                36230   36470
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              36228   36465
numa_other              2       5
numa_pages_migrated     703     726
numa_pte_updates        14742   11930

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jirka Hladky <jhladky@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1537552141-27815-7-git-send-email-srikar@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-10-02 09:42:28 +02:00
Srikar Dronamraju 7534612123 mm/migrate: Use spin_trylock() while resetting rate limit
Since this spinlock will only serialize the migrate rate limiting,
convert the spin_lock() to a spin_trylock(). If another thread is updating, this
task can move on.

Specjbb2005 results (8 warehouses)
Higher bops are better

2 Socket - 2  Node Haswell - X86
JVMS  Prev    Current  %Change
4     205332  198512   -3.32145
1     319785  313559   -1.94693

2 Socket - 4 Node Power8 - PowerNV
JVMS  Prev    Current  %Change
8     74912   74761.9  -0.200368
1     206585  214874   4.01239

2 Socket - 2  Node Power9 - PowerNV
JVMS  Prev    Current  %Change
4     189162  180536   -4.56011
1     213760  210281   -1.62753

4 Socket - 4  Node Power7 - PowerVM
JVMS  Prev     Current  %Change
8     58736.8  56511.4  -3.78877
1     105419   104899   -0.49327

Avoiding stretching of window intervals may be the reason for the
regression. Also code now uses READ_ONCE/WRITE_ONCE. That may
also be hurting performance to some extent.

Some events stats before and after applying the patch.

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        14,285,708      13,818,546
migrations                1,180,621       1,149,960
faults                    339,114         385,583
cache-misses              55,205,631,894  55,259,546,768
sched:sched_move_numa     843             2,257
sched:sched_stick_numa    6               9
sched:sched_swap_numa     219             512
migrate:mm_migrate_pages  365             2,225

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        26907   72692
numa_hint_faults_local  24279   62270
numa_hit                239771  238762
numa_huge_pte_updates   0       48
numa_interleave         68      75
numa_local              239688  238676
numa_other              83      86
numa_pages_migrated     363     2225
numa_pte_updates        27415   98557

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        3,202,779       3,173,490
migrations                37,186          36,966
faults                    106,076         108,776
cache-misses              12,024,873,744  12,200,075,320
sched:sched_move_numa     931             1,264
sched:sched_stick_numa    0               0
sched:sched_swap_numa     1               0
migrate:mm_migrate_pages  637             899

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        17409   21109
numa_hint_faults_local  14367   17120
numa_hit                73953   72934
numa_huge_pte_updates   20      42
numa_interleave         25      33
numa_local              73892   72866
numa_other              61      68
numa_pages_migrated     668     915
numa_pte_updates        27276   42326

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before       After
cs                        8,474,013    8,312,022
migrations                254,934      231,705
faults                    320,506      310,242
cache-misses              110,580,458  402,324,573
sched:sched_move_numa     725          193
sched:sched_stick_numa    0            0
sched:sched_swap_numa     7            3
migrate:mm_migrate_pages  145          93

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        22797   11838
numa_hint_faults_local  21539   11216
numa_hit                89308   90689
numa_huge_pte_updates   0       0
numa_interleave         865     1579
numa_local              88955   89634
numa_other              353     1055
numa_pages_migrated     149     92
numa_pte_updates        22930   12109

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before     After
cs                        2,195,628  2,170,481
migrations                11,179     10,126
faults                    149,656    160,962
cache-misses              8,117,515  10,834,845
sched:sched_move_numa     49         10
sched:sched_stick_numa    0          0
sched:sched_swap_numa     0          0
migrate:mm_migrate_pages  5          2

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        3577    403
numa_hint_faults_local  3476    358
numa_hit                26142   25898
numa_huge_pte_updates   0       0
numa_interleave         358     207
numa_local              26042   25860
numa_other              100     38
numa_pages_migrated     5       2
numa_pte_updates        3587    400

perf stats 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before           After
cs                        100,602,296      110,339,633
migrations                4,135,630        4,139,812
faults                    789,256          863,622
cache-misses              226,160,621,058  231,838,045,660
sched:sched_move_numa     1,366            2,196
sched:sched_stick_numa    16               33
sched:sched_swap_numa     374              544
migrate:mm_migrate_pages  1,350            2,469

vmstat 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        47857   85748
numa_hint_faults_local  39768   66831
numa_hit                240165  242213
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              240165  242211
numa_other              0       2
numa_pages_migrated     1224    2376
numa_pte_updates        48354   86233

perf stats 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before          After
cs                        58,515,496      59,331,057
migrations                564,845         552,019
faults                    245,807         266,586
cache-misses              73,603,757,976  73,796,312,990
sched:sched_move_numa     996             981
sched:sched_stick_numa    10              54
sched:sched_swap_numa     193             286
migrate:mm_migrate_pages  646             713

vmstat 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        13422   14807
numa_hint_faults_local  5619    5738
numa_hit                36118   36230
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              36116   36228
numa_other              2       2
numa_pages_migrated     616     703
numa_pte_updates        13374   14742

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jirka Hladky <jhladky@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1537552141-27815-6-git-send-email-srikar@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-10-02 09:42:26 +02:00
Mel Gorman 05cbdf4f5c sched/numa: Limit the conditions where scan period is reset
migrate_task_rq_fair() resets the scan rate for NUMA balancing on every
cross-node migration. In the event of excessive load balancing due to
saturation, this may result in the scan rate being pegged at maximum and
further overloading the machine.

This patch only resets the scan if NUMA balancing is active, a preferred
node has been selected and the task is being migrated from the preferred
node as these are the most harmful. For example, a migration to the preferred
node does not justify a faster scan rate. Similarly, a migration between two
nodes that are not preferred is probably bouncing due to over-saturation of
the machine.  In that case, scanning faster and trapping more NUMA faults
will further overload the machine.

Specjbb2005 results (8 warehouses)
Higher bops are better

2 Socket - 2  Node Haswell - X86
JVMS  Prev    Current  %Change
4     203370  205332   0.964744
1     328431  319785   -2.63252

2 Socket - 4 Node Power8 - PowerNV
JVMS  Prev    Current  %Change
1     206070  206585   0.249915

2 Socket - 2  Node Power9 - PowerNV
JVMS  Prev    Current  %Change
4     188386  189162   0.41192
1     201566  213760   6.04963

4 Socket - 4  Node Power7 - PowerVM
JVMS  Prev     Current  %Change
8     59157.4  58736.8  -0.710985
1     105495   105419   -0.0720413

Some events stats before and after applying the patch.

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        13,825,492      14,285,708
migrations                1,152,509       1,180,621
faults                    371,948         339,114
cache-misses              55,654,206,041  55,205,631,894
sched:sched_move_numa     1,856           843
sched:sched_stick_numa    4               6
sched:sched_swap_numa     428             219
migrate:mm_migrate_pages  898             365

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        57146   26907
numa_hint_faults_local  51612   24279
numa_hit                238164  239771
numa_huge_pte_updates   16      0
numa_interleave         63      68
numa_local              238085  239688
numa_other              79      83
numa_pages_migrated     883     363
numa_pte_updates        67540   27415

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        3,288,525       3,202,779
migrations                38,652          37,186
faults                    111,678         106,076
cache-misses              12,111,197,376  12,024,873,744
sched:sched_move_numa     900             931
sched:sched_stick_numa    0               0
sched:sched_swap_numa     5               1
migrate:mm_migrate_pages  714             637

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        18572   17409
numa_hint_faults_local  14850   14367
numa_hit                73197   73953
numa_huge_pte_updates   11      20
numa_interleave         25      25
numa_local              73138   73892
numa_other              59      61
numa_pages_migrated     712     668
numa_pte_updates        24021   27276

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before       After
cs                        8,451,543    8,474,013
migrations                202,804      254,934
faults                    310,024      320,506
cache-misses              253,522,507  110,580,458
sched:sched_move_numa     213          725
sched:sched_stick_numa    0            0
sched:sched_swap_numa     2            7
migrate:mm_migrate_pages  88           145

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        11830   22797
numa_hint_faults_local  11301   21539
numa_hit                90038   89308
numa_huge_pte_updates   0       0
numa_interleave         855     865
numa_local              89796   88955
numa_other              242     353
numa_pages_migrated     88      149
numa_pte_updates        12039   22930

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before     After
cs                        2,049,153  2,195,628
migrations                11,405     11,179
faults                    162,309    149,656
cache-misses              7,203,343  8,117,515
sched:sched_move_numa     22         49
sched:sched_stick_numa    0          0
sched:sched_swap_numa     0          0
migrate:mm_migrate_pages  1          5

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        1693    3577
numa_hint_faults_local  1669    3476
numa_hit                25177   26142
numa_huge_pte_updates   0       0
numa_interleave         194     358
numa_local              24993   26042
numa_other              184     100
numa_pages_migrated     1       5
numa_pte_updates        1577    3587

perf stats 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before           After
cs                        94,515,937       100,602,296
migrations                4,203,554        4,135,630
faults                    832,697          789,256
cache-misses              226,248,698,331  226,160,621,058
sched:sched_move_numa     1,730            1,366
sched:sched_stick_numa    14               16
sched:sched_swap_numa     432              374
migrate:mm_migrate_pages  1,398            1,350

vmstat 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        80079   47857
numa_hint_faults_local  68620   39768
numa_hit                241187  240165
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              241186  240165
numa_other              1       0
numa_pages_migrated     1347    1224
numa_pte_updates        80729   48354

perf stats 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before          After
cs                        63,704,961      58,515,496
migrations                573,404         564,845
faults                    230,878         245,807
cache-misses              76,568,222,781  73,603,757,976
sched:sched_move_numa     509             996
sched:sched_stick_numa    31              10
sched:sched_swap_numa     182             193
migrate:mm_migrate_pages  541             646

vmstat 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        8501    13422
numa_hint_faults_local  2960    5619
numa_hit                35526   36118
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              35526   36116
numa_other              0       2
numa_pages_migrated     539     616
numa_pte_updates        8433    13374

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jirka Hladky <jhladky@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1537552141-27815-5-git-send-email-srikar@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-10-02 09:42:24 +02:00
Srikar Dronamraju 3f9672baaa sched/numa: Reset scan rate whenever task moves across nodes
Currently task scan rate is reset when NUMA balancer migrates the task
to a different node. If NUMA balancer initiates a swap, reset is only
applicable to the task that initiates the swap. Similarly no scan rate
reset is done if the task is migrated across nodes by traditional load
balancer.

Instead move the scan reset to the migrate_task_rq. This ensures the
task moved out of its preferred node, either gets back to its preferred
node quickly or finds a new preferred node. Doing so, would be fair to
all tasks migrating across nodes.

Specjbb2005 results (8 warehouses)
Higher bops are better

2 Socket - 2  Node Haswell - X86
JVMS  Prev    Current  %Change
4     200668  203370   1.3465
1     321791  328431   2.06345

2 Socket - 4 Node Power8 - PowerNV
JVMS  Prev    Current  %Change
1     204848  206070   0.59654

2 Socket - 2  Node Power9 - PowerNV
JVMS  Prev    Current  %Change
4     188098  188386   0.153112
1     200351  201566   0.606436

4 Socket - 4  Node Power7 - PowerVM
JVMS  Prev     Current  %Change
8     58145.9  59157.4  1.73959
1     103798   105495   1.63491

Some events stats before and after applying the patch.

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        13,912,183      13,825,492
migrations                1,155,931       1,152,509
faults                    367,139         371,948
cache-misses              54,240,196,814  55,654,206,041
sched:sched_move_numa     1,571           1,856
sched:sched_stick_numa    9               4
sched:sched_swap_numa     463             428
migrate:mm_migrate_pages  703             898

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        50155   57146
numa_hint_faults_local  45264   51612
numa_hit                239652  238164
numa_huge_pte_updates   36      16
numa_interleave         68      63
numa_local              239576  238085
numa_other              76      79
numa_pages_migrated     680     883
numa_pte_updates        71146   67540

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        3,156,720       3,288,525
migrations                30,354          38,652
faults                    97,261          111,678
cache-misses              12,400,026,826  12,111,197,376
sched:sched_move_numa     4               900
sched:sched_stick_numa    0               0
sched:sched_swap_numa     1               5
migrate:mm_migrate_pages  20              714

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        272     18572
numa_hint_faults_local  186     14850
numa_hit                71362   73197
numa_huge_pte_updates   0       11
numa_interleave         23      25
numa_local              71299   73138
numa_other              63      59
numa_pages_migrated     2       712
numa_pte_updates        0       24021

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before       After
cs                        8,606,824    8,451,543
migrations                155,352      202,804
faults                    301,409      310,024
cache-misses              157,759,224  253,522,507
sched:sched_move_numa     168          213
sched:sched_stick_numa    0            0
sched:sched_swap_numa     3            2
migrate:mm_migrate_pages  125          88

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        4650    11830
numa_hint_faults_local  3946    11301
numa_hit                90489   90038
numa_huge_pte_updates   0       0
numa_interleave         892     855
numa_local              90034   89796
numa_other              455     242
numa_pages_migrated     124     88
numa_pte_updates        4818    12039

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before     After
cs                        2,113,167  2,049,153
migrations                10,533     11,405
faults                    142,727    162,309
cache-misses              5,594,192  7,203,343
sched:sched_move_numa     10         22
sched:sched_stick_numa    0          0
sched:sched_swap_numa     0          0
migrate:mm_migrate_pages  6          1

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        744     1693
numa_hint_faults_local  584     1669
numa_hit                25551   25177
numa_huge_pte_updates   0       0
numa_interleave         263     194
numa_local              25302   24993
numa_other              249     184
numa_pages_migrated     6       1
numa_pte_updates        744     1577

perf stats 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before           After
cs                        101,227,352      94,515,937
migrations                4,151,829        4,203,554
faults                    745,233          832,697
cache-misses              224,669,561,766  226,248,698,331
sched:sched_move_numa     617              1,730
sched:sched_stick_numa    2                14
sched:sched_swap_numa     187              432
migrate:mm_migrate_pages  316              1,398

vmstat 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        24195   80079
numa_hint_faults_local  21639   68620
numa_hit                238331  241187
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              238331  241186
numa_other              0       1
numa_pages_migrated     204     1347
numa_pte_updates        24561   80729

perf stats 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before          After
cs                        62,738,978      63,704,961
migrations                562,702         573,404
faults                    228,465         230,878
cache-misses              75,778,067,952  76,568,222,781
sched:sched_move_numa     648             509
sched:sched_stick_numa    13              31
sched:sched_swap_numa     137             182
migrate:mm_migrate_pages  733             541

vmstat 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        10281   8501
numa_hint_faults_local  3242    2960
numa_hit                36338   35526
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              36338   35526
numa_other              0       0
numa_pages_migrated     706     539
numa_pte_updates        10176   8433

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jirka Hladky <jhladky@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1537552141-27815-4-git-send-email-srikar@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-10-02 09:42:23 +02:00
Srikar Dronamraju 1327237a59 sched/numa: Pass destination CPU as a parameter to migrate_task_rq
This additional parameter (new_cpu) is used later for identifying if
task migration is across nodes.

No functional change.

Specjbb2005 results (8 warehouses)
Higher bops are better

2 Socket - 2  Node Haswell - X86
JVMS  Prev    Current  %Change
4     203353  200668   -1.32036
1     328205  321791   -1.95427

2 Socket - 4 Node Power8 - PowerNV
JVMS  Prev    Current  %Change
1     214384  204848   -4.44809

2 Socket - 2  Node Power9 - PowerNV
JVMS  Prev    Current  %Change
4     188553  188098   -0.241311
1     196273  200351   2.07772

4 Socket - 4  Node Power7 - PowerVM
JVMS  Prev     Current  %Change
8     57581.2  58145.9  0.980702
1     103468   103798   0.318939

Brings out the variance between different specjbb2005 runs.

Some events stats before and after applying the patch.

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        13,941,377      13,912,183
migrations                1,157,323       1,155,931
faults                    382,175         367,139
cache-misses              54,993,823,500  54,240,196,814
sched:sched_move_numa     2,005           1,571
sched:sched_stick_numa    14              9
sched:sched_swap_numa     529             463
migrate:mm_migrate_pages  1,573           703

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        67099   50155
numa_hint_faults_local  58456   45264
numa_hit                240416  239652
numa_huge_pte_updates   18      36
numa_interleave         65      68
numa_local              240339  239576
numa_other              77      76
numa_pages_migrated     1574    680
numa_pte_updates        77182   71146

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        3,176,453       3,156,720
migrations                30,238          30,354
faults                    87,869          97,261
cache-misses              12,544,479,391  12,400,026,826
sched:sched_move_numa     23              4
sched:sched_stick_numa    0               0
sched:sched_swap_numa     6               1
migrate:mm_migrate_pages  10              20

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        236     272
numa_hint_faults_local  201     186
numa_hit                72293   71362
numa_huge_pte_updates   0       0
numa_interleave         26      23
numa_local              72233   71299
numa_other              60      63
numa_pages_migrated     8       2
numa_pte_updates        0       0

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before       After
cs                        8,478,820    8,606,824
migrations                171,323      155,352
faults                    307,499      301,409
cache-misses              240,353,599  157,759,224
sched:sched_move_numa     214          168
sched:sched_stick_numa    0            0
sched:sched_swap_numa     4            3
migrate:mm_migrate_pages  89           125

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        5301    4650
numa_hint_faults_local  4745    3946
numa_hit                92943   90489
numa_huge_pte_updates   0       0
numa_interleave         899     892
numa_local              92345   90034
numa_other              598     455
numa_pages_migrated     88      124
numa_pte_updates        5505    4818

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before      After
cs                        2,066,172   2,113,167
migrations                11,076      10,533
faults                    149,544     142,727
cache-misses              10,398,067  5,594,192
sched:sched_move_numa     43          10
sched:sched_stick_numa    0           0
sched:sched_swap_numa     0           0
migrate:mm_migrate_pages  6           6

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        3552    744
numa_hint_faults_local  3347    584
numa_hit                25611   25551
numa_huge_pte_updates   0       0
numa_interleave         213     263
numa_local              25583   25302
numa_other              28      249
numa_pages_migrated     6       6
numa_pte_updates        3535    744

perf stats 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before           After
cs                        99,358,136       101,227,352
migrations                4,041,607        4,151,829
faults                    749,653          745,233
cache-misses              225,562,543,251  224,669,561,766
sched:sched_move_numa     771              617
sched:sched_stick_numa    14               2
sched:sched_swap_numa     204              187
migrate:mm_migrate_pages  1,180            316

vmstat 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        27409   24195
numa_hint_faults_local  20677   21639
numa_hit                239988  238331
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              239983  238331
numa_other              5       0
numa_pages_migrated     1016    204
numa_pte_updates        27916   24561

perf stats 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before          After
cs                        60,899,307      62,738,978
migrations                544,668         562,702
faults                    270,834         228,465
cache-misses              74,543,455,635  75,778,067,952
sched:sched_move_numa     735             648
sched:sched_stick_numa    25              13
sched:sched_swap_numa     174             137
migrate:mm_migrate_pages  816             733

vmstat 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        11059   10281
numa_hint_faults_local  4733    3242
numa_hit                41384   36338
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              41383   36338
numa_other              1       0
numa_pages_migrated     815     706
numa_pte_updates        11323   10176

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jirka Hladky <jhladky@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1537552141-27815-3-git-send-email-srikar@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-10-02 09:42:21 +02:00
Srikar Dronamraju a4739eca44 sched/numa: Stop multiple tasks from moving to the CPU at the same time
Task migration under NUMA balancing can happen in parallel. More than
one task might choose to migrate to the same CPU at the same time. This
can result in:

- During task swap, choosing a task that was not part of the evaluation.
- During task swap, task which just got moved into its preferred node,
  moving to a completely different node.
- During task swap, task failing to move to the preferred node, will have
  to wait an extra interval for the next migrate opportunity.
- During task movement, multiple task movements can cause load imbalance.

This problem is more likely if there are more cores per node or more
nodes in the system.

Use a per run-queue variable to check if NUMA-balance is active on the
run-queue.

Specjbb2005 results (8 warehouses)
Higher bops are better

2 Socket - 2  Node Haswell - X86
JVMS  Prev    Current  %Change
4     200194  203353   1.57797
1     311331  328205   5.41995

2 Socket - 4 Node Power8 - PowerNV
JVMS  Prev    Current  %Change
1     197654  214384   8.46429

2 Socket - 2  Node Power9 - PowerNV
JVMS  Prev    Current  %Change
4     192605  188553   -2.10379
1     213402  196273   -8.02664

4 Socket - 4  Node Power7 - PowerVM
JVMS  Prev     Current  %Change
8     52227.1  57581.2  10.2516
1     102529   103468   0.915838

There is a regression on power 9 box. If we look at the details,
that box has a sudden jump in cache-misses with this patch.
All other parameters seem to be pointing towards NUMA
consolidation.

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        13,345,784      13,941,377
migrations                1,127,820       1,157,323
faults                    374,736         382,175
cache-misses              55,132,054,603  54,993,823,500
sched:sched_move_numa     1,923           2,005
sched:sched_stick_numa    52              14
sched:sched_swap_numa     595             529
migrate:mm_migrate_pages  1,932           1,573

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        60605   67099
numa_hint_faults_local  51804   58456
numa_hit                239945  240416
numa_huge_pte_updates   14      18
numa_interleave         60      65
numa_local              239865  240339
numa_other              80      77
numa_pages_migrated     1931    1574
numa_pte_updates        67823   77182

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                     Before          After
cs                        3,016,467       3,176,453
migrations                37,326          30,238
faults                    115,342         87,869
cache-misses              11,692,155,554  12,544,479,391
sched:sched_move_numa     965             23
sched:sched_stick_numa    8               0
sched:sched_swap_numa     35              6
migrate:mm_migrate_pages  1,168           10

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Haswell - X86
Event                   Before  After
numa_hint_faults        16286   236
numa_hint_faults_local  11863   201
numa_hit                112482  72293
numa_huge_pte_updates   33      0
numa_interleave         20      26
numa_local              112419  72233
numa_other              63      60
numa_pages_migrated     1144    8
numa_pte_updates        32859   0

perf stats 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before       After
cs                        8,629,724    8,478,820
migrations                221,052      171,323
faults                    308,661      307,499
cache-misses              135,574,913  240,353,599
sched:sched_move_numa     147          214
sched:sched_stick_numa    0            0
sched:sched_swap_numa     2            4
migrate:mm_migrate_pages  64           89

vmstat 8th warehouse Multi JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        11481   5301
numa_hint_faults_local  10968   4745
numa_hit                89773   92943
numa_huge_pte_updates   0       0
numa_interleave         1116    899
numa_local              89220   92345
numa_other              553     598
numa_pages_migrated     62      88
numa_pte_updates        11694   5505

perf stats 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                     Before     After
cs                        2,272,887  2,066,172
migrations                12,206     11,076
faults                    163,704    149,544
cache-misses              4,801,186  10,398,067
sched:sched_move_numa     44         43
sched:sched_stick_numa    0          0
sched:sched_swap_numa     0          0
migrate:mm_migrate_pages  17         6

vmstat 8th warehouse Single JVM 2 Socket - 2  Node Power9 - PowerNV
Event                   Before  After
numa_hint_faults        2261    3552
numa_hint_faults_local  1993    3347
numa_hit                25726   25611
numa_huge_pte_updates   0       0
numa_interleave         239     213
numa_local              25498   25583
numa_other              228     28
numa_pages_migrated     17      6
numa_pte_updates        2266    3535

perf stats 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before           After
cs                        117,980,962      99,358,136
migrations                3,950,220        4,041,607
faults                    736,979          749,653
cache-misses              224,976,072,879  225,562,543,251
sched:sched_move_numa     504              771
sched:sched_stick_numa    50               14
sched:sched_swap_numa     239              204
migrate:mm_migrate_pages  1,260            1,180

vmstat 8th warehouse Multi JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        18293   27409
numa_hint_faults_local  11969   20677
numa_hit                240854  239988
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              240851  239983
numa_other              3       5
numa_pages_migrated     1190    1016
numa_pte_updates        18106   27916

perf stats 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                     Before          After
cs                        61,053,158      60,899,307
migrations                551,586         544,668
faults                    244,174         270,834
cache-misses              74,326,766,973  74,543,455,635
sched:sched_move_numa     344             735
sched:sched_stick_numa    24              25
sched:sched_swap_numa     140             174
migrate:mm_migrate_pages  568             816

vmstat 8th warehouse Single JVM 4 Socket - 4  Node Power7 - PowerVM
Event                   Before  After
numa_hint_faults        6461    11059
numa_hint_faults_local  2283    4733
numa_hit                35661   41384
numa_huge_pte_updates   0       0
numa_interleave         0       0
numa_local              35661   41383
numa_other              0       1
numa_pages_migrated     568     815
numa_pte_updates        6518    11323

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Rik van Riel <riel@surriel.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Jirka Hladky <jhladky@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1537552141-27815-2-git-send-email-srikar@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-10-02 09:42:20 +02:00
Greg Kroah-Hartman 291d0e5d81 for-linus-20180929
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Merge tag 'for-linus-20180929' of git://git.kernel.dk/linux-block

Jens writes:
  "Block fixes for 4.19-rc6

   A set of fixes that should go into this release. This pull request
   contains:

   - A fix (hopefully) for the persistent grants for xen-blkfront. A
     previous fix from this series wasn't complete, hence reverted, and
     this one should hopefully be it. (Boris Ostrovsky)

   - Fix for an elevator drain warning with SMR devices, which is
     triggered when you switch schedulers (Damien)

   - bcache deadlock fix (Guoju Fang)

   - Fix for the block unplug tracepoint, which has had the
     timer/explicit flag reverted since 4.11 (Ilya)

   - Fix a regression in this series where the blk-mq timeout hook is
     invoked with the RCU read lock held, hence preventing it from
     blocking (Keith)

   - NVMe pull from Christoph, with a single multipath fix (Susobhan Dey)"

* tag 'for-linus-20180929' of git://git.kernel.dk/linux-block:
  xen/blkfront: correct purging of persistent grants
  Revert "xen/blkfront: When purging persistent grants, keep them in the buffer"
  blk-mq: I/O and timer unplugs are inverted in blktrace
  bcache: add separate workqueue for journal_write to avoid deadlock
  xen/blkfront: When purging persistent grants, keep them in the buffer
  block: fix deadline elevator drain for zoned block devices
  blk-mq: Allow blocking queue tag iter callbacks
  nvme: properly propagate errors in nvme_mpath_init
2018-09-29 14:52:14 -07:00
Greg Kroah-Hartman e75417739b Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Thomas writes:
  "A single fix for the AMD memory encryption boot code so it does not
   read random garbage instead of the cached encryption bit when a kexec
   kernel is allocated above the 32bit address limit."

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Fix kexec booting failure in the SEV bit detection code
2018-09-29 14:34:06 -07:00
Greg Kroah-Hartman e1ce697db6 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Thomas writes:
  "Three small fixes for clocksource drivers:
   - Proper error handling in the Atmel PIT driver
   - Add CLOCK_SOURCE_SUSPEND_NONSTOP for TI SoCs so suspend works again
   - Fix the next event function for Facebook Backpack-CMM BMC chips so
     usleep(100) doesnt sleep several milliseconds"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/drivers/timer-atmel-pit: Properly handle error cases
  clocksource/drivers/fttmr010: Fix set_next_event handler
  clocksource/drivers/ti-32k: Add CLOCK_SOURCE_SUSPEND_NONSTOP flag for non-am43 SoCs
2018-09-29 14:32:49 -07:00
Greg Kroah-Hartman af17b3aa1f Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Thomas writes:
  "A single fix for a missing sanity check when a pinned event is tried
  to be read on the wrong CPU due to a legit event scheduling failure."

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Add sanity check to deal with pinned event failure
2018-09-29 11:32:03 -07:00
Greg Kroah-Hartman 82ec752cce Power management fix for 4.19-rc6
Fix incorrect __init and __exit annotations in the Qualcomm
 Kryo cpufreq driver (Nathan Chancellor).
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Merge tag 'pm-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Rafael writes:
  "Power management fix for 4.19-rc6

   Fix incorrect __init and __exit annotations in the Qualcomm
   Kryo cpufreq driver (Nathan Chancellor)."

* tag 'pm-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: qcom-kryo: Fix section annotations
2018-09-29 06:50:36 -07:00
Nathan Chancellor d51aea13dd cpufreq: qcom-kryo: Fix section annotations
There is currently a warning when building the Kryo cpufreq driver into
the kernel image:

WARNING: vmlinux.o(.text+0x8aa424): Section mismatch in reference from
the function qcom_cpufreq_kryo_probe() to the function
.init.text:qcom_cpufreq_kryo_get_msm_id()
The function qcom_cpufreq_kryo_probe() references
the function __init qcom_cpufreq_kryo_get_msm_id().
This is often because qcom_cpufreq_kryo_probe lacks a __init
annotation or the annotation of qcom_cpufreq_kryo_get_msm_id is wrong.

Remove the '__init' annotation from qcom_cpufreq_kryo_get_msm_id
so that there is no more mismatch warning.

Additionally, Nick noticed that the remove function was marked as
'__init' when it should really be marked as '__exit'.

Fixes: 46e2856b8e (cpufreq: Add Kryo CPU scaling driver)
Fixes: 5ad7346b4a (cpufreq: kryo: Add module remove and exit)
Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 4.18+ <stable@vger.kernel.org> # 4.18+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-09-29 15:01:10 +02:00
Greg Kroah-Hartman 7a6878bb4e fix a missing Kconfig symbol for commits introduced in 4.19-rc
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Merge tag 'dma-mapping-4.19-3' of git://git.infradead.org/users/hch/dma-mapping

Christoph writes:
  "dma mapping fix for 4.19-rc6

   fix a missing Kconfig symbol for commits introduced in 4.19-rc"

* tag 'dma-mapping-4.19-3' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: add the missing ARCH_HAS_SYNC_DMA_FOR_CPU_ALL declaration
2018-09-29 02:52:24 -07:00
Greg Kroah-Hartman e704966c45 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Dmitry writes:
  "Input updates for v4.19-rc5

   Just a few driver fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: uinput - allow for max == min during input_absinfo validation
  Input: elantech - enable middle button of touchpad on ThinkPad P72
  Input: atakbd - fix Atari CapsLock behaviour
  Input: atakbd - fix Atari keymap
  Input: egalax_ts - add system wakeup support
  Input: gpio-keys - fix a documentation index issue
2018-09-28 18:04:50 -07:00
Greg Kroah-Hartman 2f19e7a7e6 spi: Fixes for v4.19
Quite a few fixes for the Renesas drivers in here, plus a fix for the
 Tegra driver and some documentation fixes for the recently added spi-mem
 code.  The Tegra fix is relatively large but fairly straightforward and
 mechanical, it runs on probe so it's been reasonably well covered in
 -next testing.
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Merge tag 'spi-fix-v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Mark writes:
  "spi: Fixes for v4.19

   Quite a few fixes for the Renesas drivers in here, plus a fix for the
   Tegra driver and some documentation fixes for the recently added
   spi-mem code.  The Tegra fix is relatively large but fairly
   straightforward and mechanical, it runs on probe so it's been
   reasonably well covered in -next testing."

* tag 'spi-fix-v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: spi-mem: Move the DMA-able constraint doc to the kerneldoc header
  spi: spi-mem: Add missing description for data.nbytes field
  spi: rspi: Fix interrupted DMA transfers
  spi: rspi: Fix invalid SPI use during system suspend
  spi: sh-msiof: Fix handling of write value for SISTR register
  spi: sh-msiof: Fix invalid SPI use during system suspend
  spi: gpio: Fix copy-and-paste error
  spi: tegra20-slink: explicitly enable/disable clock
2018-09-28 18:04:06 -07:00
Greg Kroah-Hartman 8f0566118e regulator: Fixes for 4.19
A collection of fairly minor bug fixes here, a couple of driver specific
 ones plus two core fixes.  There's one fix for the new suspend state
 code which fixes some confusion with constant values that are supposed
 to indicate noop operation and another fixing a race condition with the
 creation of sysfs files on new regulators.
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Merge tag 'regulator-v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Mark writes:
  "regulator: Fixes for 4.19

   A collection of fairly minor bug fixes here, a couple of driver
   specific ones plus two core fixes.  There's one fix for the new
   suspend state code which fixes some confusion with constant values
   that are supposed to indicate noop operation and another fixing a
   race condition with the creation of sysfs files on new regulators."

* tag 'regulator-v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: fix crash caused by null driver data
  regulator: Fix 'do-nothing' value for regulators without suspend state
  regulator: da9063: fix DT probing with constraints
  regulator: bd71837: Disable voltage monitoring for LDO3/4
2018-09-28 18:02:25 -07:00
Greg Kroah-Hartman f005de0183 powerpc fixes for 4.19 #3
A reasonably big batch of fixes due to me being away for a few weeks.
 
 A fix for the TM emulation support on Power9, which could result in corrupting
 the guest r11 when running under KVM.
 
 Two fixes to the TM code which could lead to userspace GPR corruption if we take
 an SLB miss at exactly the wrong time.
 
 Our dynamic patching code had a bug that meant we could patch freed __init text,
 which could lead to corrupting userspace memory.
 
 csum_ipv6_magic() didn't work on little endian platforms since we optimised it
 recently.
 
 A fix for an endian bug when reading a device tree property telling us how many
 storage keys the machine has available.
 
 Fix a crash seen on some configurations of PowerVM when migrating the partition
 from one machine to another.
 
 A fix for a regression in the setup of our CPU to NUMA node mapping in KVM
 guests.
 
 A fix to our selftest Makefiles to make them work since a recent change to the
 shared Makefile logic.
 
 Thanks to:
   Alexey Kardashevskiy, Breno Leitao, Christophe Leroy, Michael Bringmann,
   Michael Neuling, Nicholas Piggin, Paul Mackerras,, Srikar Dronamraju, Thiago
   Jung Bauermann, Xin Long.
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Merge tag 'powerpc-4.19-3' of https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Michael writes:
  "powerpc fixes for 4.19 #3

   A reasonably big batch of fixes due to me being away for a few weeks.

   A fix for the TM emulation support on Power9, which could result in
   corrupting the guest r11 when running under KVM.

   Two fixes to the TM code which could lead to userspace GPR corruption
   if we take an SLB miss at exactly the wrong time.

   Our dynamic patching code had a bug that meant we could patch freed
   __init text, which could lead to corrupting userspace memory.

   csum_ipv6_magic() didn't work on little endian platforms since we
   optimised it recently.

   A fix for an endian bug when reading a device tree property telling
   us how many storage keys the machine has available.

   Fix a crash seen on some configurations of PowerVM when migrating the
   partition from one machine to another.

   A fix for a regression in the setup of our CPU to NUMA node mapping
   in KVM guests.

   A fix to our selftest Makefiles to make them work since a recent
   change to the shared Makefile logic."

* tag 'powerpc-4.19-3' of https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  selftests/powerpc: Fix Makefiles for headers_install change
  powerpc/numa: Use associativity if VPHN hcall is successful
  powerpc/tm: Avoid possible userspace r1 corruption on reclaim
  powerpc/tm: Fix userspace r13 corruption
  powerpc/pseries: Fix unitialized timer reset on migration
  powerpc/pkeys: Fix reading of ibm, processor-storage-keys property
  powerpc: fix csum_ipv6_magic() on little endian platforms
  powerpc/powernv/ioda2: Reduce upper limit for DMA window size (again)
  powerpc: Avoid code patching freed init sections
  KVM: PPC: Book3S HV: Fix guest r11 corruption with POWER9 TM workarounds
2018-09-28 17:43:32 -07:00
Greg Kroah-Hartman 900915f903 Pin control fixes for v4.19:
- Fixes to x86 hardware:
 - AMD interrupt debounce issues
 - Faulty Intel cannonlake register offset
 - Revert pin translation IRQ locking
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Merge tag 'pinctrl-v4.19-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Linus writes:
  "Pin control fixes for v4.19:
   - Fixes to x86 hardware:
   - AMD interrupt debounce issues
   - Faulty Intel cannonlake register offset
   - Revert pin translation IRQ locking"

* tag 'pinctrl-v4.19-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  Revert "pinctrl: intel: Do pin translation when lock IRQ"
  pinctrl: cannonlake: Fix HOSTSW_OWN register offset of H variant
  pinctrl/amd: poll InterruptEnable bits in amd_gpio_irq_set_type
2018-09-28 17:42:44 -07:00
Reinette Chatre befb1b3c27 perf/core: Add sanity check to deal with pinned event failure
It is possible that a failure can occur during the scheduling of a
pinned event. The initial portion of perf_event_read_local() contains
the various error checks an event should pass before it can be
considered valid. Ensure that the potential scheduling failure
of a pinned event is checked for and have a credible error.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: fenghua.yu@intel.com
Cc: tony.luck@intel.com
Cc: acme@kernel.org
Cc: gavin.hindman@intel.com
Cc: jithu.joseph@intel.com
Cc: dave.hansen@intel.com
Cc: hpa@zytor.com
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/6486385d1f30336e9973b24c8c65f5079543d3d3.1537377064.git.reinette.chatre@intel.com
2018-09-28 22:44:53 +02:00
Greg Kroah-Hartman f151f57bfd amd, etnaviv, mali_dp, syncobj and panel fixes
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Merge tag 'drm-fixes-2018-09-28' of git://anongit.freedesktop.org/drm/drm

Dave writes:
  "drm fixes for 4.19-rc6

   Looks like a pretty normal week for graphics,

   core: syncobj fix, panel link regression revert
   amd: suspend/resume fixes, EDID emulation fix
   mali-dp: NV12 writeback and vblank reset fixes
   etnaviv: DMA setup fix"

* tag 'drm-fixes-2018-09-28' of git://anongit.freedesktop.org/drm/drm:
  drm/amd/display: Fix Edid emulation for linux
  drm/amd/display: Fix Vega10 lightup on S3 resume
  drm/amdgpu: Fix vce work queue was not cancelled when suspend
  Revert "drm/panel: Add device_link from panel device to DRM device"
  drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set
  drm/malidp: Fix writeback in NV12
  drm: mali-dp: Call drm_crtc_vblank_reset on device init
  drm/etnaviv: add DMA configuration for etnaviv platform device
2018-09-28 18:55:17 +02:00
Greg Kroah-Hartman ed1b3f4c4f A Single RISC-V Update for 4.19-rc6
The Debian guys have been pushing on our port and found some unversioned
 symbols leaking into modules.  This PR contains a single fix for that
 issue.
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Merge tag 'riscv-for-linus-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux

Palmer writes:
  "A Single RISC-V Update for 4.19-rc6

   The Debian guys have been pushing on our port and found some
   unversioned symbols leaking into modules.  This PR contains a single
   fix for that issue."

* tag 'riscv-for-linus-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
  RISC-V: include linux/ftrace.h in asm-prototypes.h
2018-09-28 18:53:22 +02:00
Greg Kroah-Hartman 278e59a007 pci-v4.19-fixes-2
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Merge tag 'pci-v4.19-fixes-2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Bjorn writes:
  "PCI fixes:

  - Fix ACPI hotplug issue that causes black screen crash at boot (Mika
    Westerberg)

  - Fix DesignWare "scheduling while atomic" issues (Jisheng Zhang)

  - Add PPC contacts to MAINTAINERS for PCI core error handling (Bjorn
    Helgaas)

  - Sort Mobiveil MAINTAINERS entry (Lorenzo Pieralisi)"

* tag 'pci-v4.19-fixes-2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  ACPI / hotplug / PCI: Don't scan for non-hotplug bridges if slot is not bridge
  PCI: dwc: Fix scheduling while atomic issues
  MAINTAINERS: Move mobiveil PCI driver entry where it belongs
  MAINTAINERS: Update PPC contacts for PCI core error handling
2018-09-28 18:20:41 +02:00
Jens Axboe 133424a207 Merge branch 'nvme-4.19' of git://git.infradead.org/nvme into for-linus
Pull NVMe fix from Christoph.

* 'nvme-4.19' of git://git.infradead.org/nvme:
  nvme: properly propagate errors in nvme_mpath_init
2018-09-28 09:41:40 -06:00
Juergen Gross 6c76786740 xen/blkfront: correct purging of persistent grants
Commit a46b53672b ("xen/blkfront: cleanup
stale persistent grants") introduced a regression as purged persistent
grants were not pu into the list of free grants again. Correct that.

Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-09-28 09:40:39 -06:00
Jens Axboe 15c2068876 Revert "xen/blkfront: When purging persistent grants, keep them in the buffer"
Fix didn't work for all cases, reverting to add a (hopefully)
better fix.

This reverts commit f151ba989d.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-09-28 09:40:17 -06:00
Michael Ellerman 7e0cf1c983 selftests/powerpc: Fix Makefiles for headers_install change
Commit b2d35fa5fc ("selftests: add headers_install to lib.mk")
introduced a requirement that Makefiles more than one level below the
selftests directory need to define top_srcdir, but it didn't update
any of the powerpc Makefiles.

This broke building all the powerpc selftests with eg:

  make[1]: Entering directory '/src/linux/tools/testing/selftests/powerpc'
  BUILD_TARGET=/src/linux/tools/testing/selftests/powerpc/alignment; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C alignment all
  make[2]: Entering directory '/src/linux/tools/testing/selftests/powerpc/alignment'
  ../../lib.mk:20: ../../../../scripts/subarch.include: No such file or directory
  make[2]: *** No rule to make target '../../../../scripts/subarch.include'.
  make[2]: Failed to remake makefile '../../../../scripts/subarch.include'.
  Makefile:38: recipe for target 'alignment' failed

Fix it by setting top_srcdir in the affected Makefiles.

Fixes: b2d35fa5fc ("selftests: add headers_install to lib.mk")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-09-28 15:07:45 +10:00
Dave Airlie fcb1349a2a Merge branch 'drm-fixes-4.19' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
Just a few fixes for 4.19:
- Couple of suspend/resume fixes
- Fix EDID emulation with DC

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927155418.2813-1-alexander.deucher@amd.com
2018-09-28 09:30:22 +10:00
Dave Airlie adba0e5493 - Revert adding device-link to panels
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Merge tag 'drm-misc-fixes-2018-09-27-1' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

- Revert adding device-link to panels
- Don't leak fences in drm/syncobj

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927152712.GA53076@art_vandelay
2018-09-28 09:25:56 +10:00
Greg Kroah-Hartman ad0371482b Second rc pull request
- Fix a long standing race bug when destroying comp_event file descriptors
 
 - srp, hfi1, bnxt_re: Various driver crashes from missing validation and
   other cases
 
 - Fixes for regressions in patches merged this window in the gid cache,
   devx, ucma and uapi.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Jason writes:
  "Second RDMA rc pull request

   - Fix a long standing race bug when destroying comp_event file descriptors

   - srp, hfi1, bnxt_re: Various driver crashes from missing validation
     and other cases

   - Fixes for regressions in patches merged this window in the gid
     cache, devx, ucma and uapi."

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/core: Set right entry state before releasing reference
  IB/mlx5: Destroy the DEVX object upon error flow
  IB/uverbs: Free uapi on destroy
  RDMA/bnxt_re: Fix system crash during RDMA resource initialization
  IB/hfi1: Fix destroy_qp hang after a link down
  IB/hfi1: Fix context recovery when PBC has an UnsupportedVL
  IB/hfi1: Invalid user input can result in crash
  IB/hfi1: Fix SL array bounds check
  RDMA/uverbs: Fix validity check for modify QP
  IB/srp: Avoid that sg_reset -d ${srp_device} triggers an infinite loop
  ucma: fix a use-after-free in ucma_resolve_ip()
  RDMA/uverbs: Atomically flush and mark closed the comp event queue
  cxgb4: fix abort_req_rss6 struct
2018-09-27 21:53:55 +02:00
Greg Kroah-Hartman c127e59bee \n
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Merge tag 'for_v4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Jan writes:
  "an ext2 patch fixing fsync(2) for DAX mounts."

* tag 'for_v4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  ext2, dax: set ext2_dax_aops for dax files
2018-09-27 21:16:24 +02:00
Ilya Dryomov 587562d0c7 blk-mq: I/O and timer unplugs are inverted in blktrace
trace_block_unplug() takes true for explicit unplugs and false for
implicit unplugs.  schedule() unplugs are implicit and should be
reported as timer unplugs.  While correct in the legacy code, this has
been inverted in blk-mq since 4.11.

Cc: stable@vger.kernel.org
Fixes: bd166ef183 ("blk-mq-sched: add framework for MQ capable IO schedulers")
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-09-27 13:12:44 -06:00
Kairui Song bdec8d7fa5 x86/boot: Fix kexec booting failure in the SEV bit detection code
Commit

  1958b5fc40 ("x86/boot: Add early boot support when running with SEV active")

can occasionally cause system resets when kexec-ing a second kernel even
if SEV is not active.

That's because get_sev_encryption_bit() uses 32-bit rIP-relative
addressing to read the value of enc_bit - a variable which caches a
previously detected encryption bit position - but kexec may allocate
the early boot code to a higher location, beyond the 32-bit addressing
limit.

In this case, garbage will be read and get_sev_encryption_bit() will
return the wrong value, leading to accessing memory with the wrong
encryption setting.

Therefore, remove enc_bit, and thus get rid of the need to do 32-bit
rIP-relative addressing in the first place.

 [ bp: massage commit message heavily. ]

Fixes: 1958b5fc40 ("x86/boot: Add early boot support when running with SEV active")
Suggested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de
Cc: mingo@redhat.com
Cc: hpa@zytor.com
Cc: brijesh.singh@amd.com
Cc: kexec@lists.infradead.org
Cc: dyoung@redhat.com
Cc: bhe@redhat.com
Cc: ghook@redhat.com
Link: https://lkml.kernel.org/r/20180927123845.32052-1-kasong@redhat.com
2018-09-27 19:35:03 +02:00
Guoju Fang 0f843e65d9 bcache: add separate workqueue for journal_write to avoid deadlock
After write SSD completed, bcache schedules journal_write work to
system_wq, which is a public workqueue in system, without WQ_MEM_RECLAIM
flag. system_wq is also a bound wq, and there may be no idle kworker on
current processor. Creating a new kworker may unfortunately need to
reclaim memory first, by shrinking cache and slab used by vfs, which
depends on bcache device. That's a deadlock.

This patch create a new workqueue for journal_write with WQ_MEM_RECLAIM
flag. It's rescuer thread will work to avoid the deadlock.

Signed-off-by: Guoju Fang <fangguoju@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-09-27 09:47:01 -06:00
Bhawanpreet Lakha fbbdadf2fa drm/amd/display: Fix Edid emulation for linux
[Why]
EDID emulation didn't work properly for linux, as we stop programming
if nothing is connected physically.

[How]
We get a flag from DRM when we want to do edid emulation. We check if
this flag is true and nothing is connected physically, if so we only
program the front end using VIRTUAL_SIGNAL.

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-09-27 10:05:21 -05:00
Roman Li 599760d6d0 drm/amd/display: Fix Vega10 lightup on S3 resume
[Why]
There have been a few reports of Vega10 display remaining blank
after S3 resume. The regression is caused by workaround for mode
change on Vega10 - skip set_bandwidth if stream count is 0.
As a result we skipped dispclk reset on suspend, thus on resume
we may skip the clock update assuming it hasn't been changed.
On some systems it causes display blank or 'out of range'.

[How]
Revert "drm/amd/display: Fix Vega10 black screen after mode change"
Verified that it hadn't cause mode change regression.

Signed-off-by: Roman Li <Roman.Li@amd.com>
Reviewed-by: Sun peng Li <Sunpeng.Li@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-09-27 10:03:12 -05:00
Rex Zhu 61ea6f5831 drm/amdgpu: Fix vce work queue was not cancelled when suspend
The vce cancel_delayed_work_sync never be called.
driver call the function in error path.

This caused the A+A suspend hang when runtime pm enebled.
As we will visit the smu in the idle queue. this will cause
smu hang because the dgpu has been suspend, and the dgpu also
will be waked up. As the smu has been hang, so the dgpu resume
will failed.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2018-09-27 10:01:20 -05:00
Linus Walleij d6a77ba0eb Revert "drm/panel: Add device_link from panel device to DRM device"
This reverts commit 0c08754b59.

commit 0c08754b59
("drm/panel: Add device_link from panel device to DRM device")
creates a circular dependency under these circumstances:

1. The panel depends on dsi-host because it is MIPI-DSI child
   device.
2. dsi-host depends on the drm parent device (connector->dev->dev)
   this should be allowed.
3. drm parent dev (connector->dev->dev) depends on the panel
   after this patch.

This makes the dependency circular and while it appears it
does not affect any in-tree drivers (they do not seem to have
dsi hosts depending on the same parent device) this does not
seem right.

As noted in a response from Andrzej Hajda, the intent is
likely to make the panel dependent on the DRM device
(connector->dev) not its parent. But we have no way of
doing that since the DRM device doesn't contain any
struct device on its own (arguably it should).

Revert this until a proper approach is figured out.

Cc: Jyri Sarha <jsarha@ti.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927124130.9102-1-linus.walleij@linaro.org
2018-09-27 11:00:42 -04:00
Thomas Gleixner 090bcfd5d1 Merge branch 'clockevents/4.19-fixes' of https://git.linaro.org/people/daniel.lezcano/linux into timers/urgent
Pull another fix from Daniel Lezcano, which felt through the cracks:

 - Fix a potential memory leak reported by smatch in the atmel timer driver
2018-09-27 16:50:22 +02:00
Boris Ostrovsky f151ba989d xen/blkfront: When purging persistent grants, keep them in the buffer
Commit a46b53672b ("xen/blkfront: cleanup stale persistent grants")
added support for purging persistent grants when they are not in use. As
part of the purge, the grants were removed from the grant buffer, This
eventually causes the buffer to become empty, with BUG_ON triggered in
get_free_grant(). This can be observed even on an idle system, within
20-30 minutes.

We should keep the grants in the buffer when purging, and only free the
grant ref.

Fixes: a46b53672b ("xen/blkfront: cleanup stale persistent grants")
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-09-27 08:26:38 -06:00
Alexandre Belloni 52bf4a900d clocksource/drivers/timer-atmel-pit: Properly handle error cases
The smatch utility reports a possible leak:

smatch warnings:
drivers/clocksource/timer-atmel-pit.c:183 at91sam926x_pit_dt_init() warn: possible memory leak of 'data'

Ensure data is freed before exiting with an error.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2018-09-27 12:01:45 +02:00
Damien Le Moal 854f31ccdd block: fix deadline elevator drain for zoned block devices
When the deadline scheduler is used with a zoned block device, writes
to a zone will be dispatched one at a time. This causes the warning
message:

deadline: forced dispatching is broken (nr_sorted=X), please report this

to be displayed when switching to another elevator with the legacy I/O
path while write requests to a zone are being retained in the scheduler
queue.

Prevent this message from being displayed when executing
elv_drain_elevator() for a zoned block device. __blk_drain_queue() will
loop until all writes are dispatched and completed, resulting in the
desired elevator queue drain without extensive modifications to the
deadline code itself to handle forced-dispatch calls.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Fixes: 8dc8146f9c ("deadline-iosched: Introduce zone locking support")
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-09-26 19:57:24 -06:00
Dave Airlie 576156bb01 Merge branch 'for-upstream/malidp-fixes' of git://linux-arm.org/linux-ld into drm-fixes
Fix NV12 writeback and fix vblank reset.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Liviu Dudau <Liviu.Dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180921112354.GR936@e110455-lin.cambridge.arm.com
2018-09-27 10:49:44 +10:00
Dave Airlie e89fe98bba Merge branch 'etnaviv/fixes' of https://git.pengutronix.de/git/lst/linux into drm-fixes
one fix to get a proper DMA configuration in place for the etnaviv
virtual device. I'm sending this as a fix, as a dma-mapping change at
the ARC architecture side during the 4.19 cycle broke etnaviv on this
platform, which gets remedied with this patch, but it also enables
ARM64.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Lucas Stach <l.stach@pengutronix.de>
Link: https://patchwork.freedesktop.org/patch/msgid/ea1f712bf09bf9439c6b092bf2c2bde7bb01cf5e.camel@pengutronix.de
2018-09-27 10:49:10 +10:00
Mika Westerberg f188b99f0b ACPI / hotplug / PCI: Don't scan for non-hotplug bridges if slot is not bridge
HP 6730b laptop has an ethernet NIC connected to one of the PCIe root
ports.  The root ports themselves are native PCIe hotplug capable.  Now,
during boot after PCI devices are scanned the BIOS triggers ACPI bus check
directly to the NIC:

  ACPI: \_SB_.PCI0.RP06.NIC_: Bus check in hotplug_event()

It is not clear why it is sending bus check but regardless the ACPI hotplug
notify handler calls enable_slot() directly (instead of going through
acpiphp_check_bridge() as there is no bridge), which ends up handling
special case for non-hotplug bridges with native PCIe hotplug.  This
results a crash of some kind but the reporter only sees black screen so it
is hard to figure out the exact spot and what actually happens.  Based on
a few fix proposals it was tracked to crash somewhere inside
pci_assign_unassigned_bridge_resources().

In any case we should not really be in that special branch at all because
the ACPI notify happened to a slot that is not a PCI bridge (it is just a
regular PCI device).

Fix this so that we only go to that special branch if we are calling
enable_slot() for a bridge (e.g., the ACPI notification was for the
bridge).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=201127
Fixes: 84c8b58ed3 ("ACPI / hotplug / PCI: Don't scan bridges managed by native hotplug")
Reported-by: Peter Anemone <peter.anemone@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
CC: stable@vger.kernel.org	# v4.18+
2018-09-26 15:39:28 -05:00
Jason Ekstrand 337fe9f5c1 drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set
We attempt to get fences earlier in the hopes that everything will
already have fences and no callbacks will be needed.  If we do succeed
in getting a fence, getting one a second time will result in a duplicate
ref with no unref.  This is causing memory leaks in Vulkan applications
that create a lot of fences; playing for a few hours can, apparently,
bring down the system.

Cc: stable@vger.kernel.org
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107899
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180926071703.15257-1-jason.ekstrand@intel.com
2018-09-26 10:39:14 -04:00
Greg Kroah-Hartman c307aaf3eb IOMMU Fixes for Linux v4.19-rc5
Three fixes queued up:
 
 	- Warning fix for Rockchip IOMMU where there were IRQ handlers
 	  for offlined hardware.
 
 	- Fix for Intel VT-d because recent changes caused boot failures
 	  on some machines because it tried to allocate to much
 	  contiguous memory.
 
 	- Fix for AMD IOMMU to handle eMMC devices correctly that appear
 	  as ACPI HID devices.
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Merge tag 'iommu-fixes-v4.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Joerg writes:
  "IOMMU Fixes for Linux v4.19-rc5

   Three fixes queued up:

	- Warning fix for Rockchip IOMMU where there were IRQ handlers
	  for offlined hardware.

	- Fix for Intel VT-d because recent changes caused boot failures
	  on some machines because it tried to allocate to much
	  contiguous memory.

	- Fix for AMD IOMMU to handle eMMC devices correctly that appear
	  as ACPI HID devices."

* tag 'iommu-fixes-v4.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Return devid as alias for ACPI HID devices
  iommu/vt-d: Handle memory shortage on pasid table allocation
  iommu/rockchip: Free irqs in shutdown handler
2018-09-26 13:09:18 +02:00
Arindam Nath 5ebb1bc2d6 iommu/amd: Return devid as alias for ACPI HID devices
ACPI HID devices do not actually have an alias for
them in the IVRS. But dev_data->alias is still used
for indexing into the IOMMU device table for devices
being handled by the IOMMU. So for ACPI HID devices,
we simply return the corresponding devid as an alias,
as parsed from IVRS table.

Signed-off-by: Arindam Nath <arindam.nath@amd.com>
Fixes: 2bf9a0a127 ('iommu/amd: Add iommu support for ACPI HID devices')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-09-26 09:41:11 +02:00
Keith Busch 530ca2c9bd blk-mq: Allow blocking queue tag iter callbacks
A recent commit runs tag iterator callbacks under the rcu read lock,
but existing callbacks do not satisfy the non-blocking requirement.
The commit intended to prevent an iterator from accessing a queue that's
being modified. This patch fixes the original issue by taking a queue
reference instead of reading it, which allows callbacks to make blocking
calls.

Fixes: f5bbbbe4d6 ("blk-mq: sync the update nr_hw_queues with blk_mq_queue_tag_busy_iter")
Acked-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-09-25 20:17:59 -06:00
Susobhan Dey bb830add19 nvme: properly propagate errors in nvme_mpath_init
Signed-off-by: Susobhan Dey <susobhan.dey@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-09-25 16:21:40 -07:00
Christoph Hellwig 974c24c5be dma-mapping: add the missing ARCH_HAS_SYNC_DMA_FOR_CPU_ALL declaration
The patch adding the infrastructure failed to actually add the symbol
declaration, oops..

Fixes: faef87723a ("dma-noncoherent: add a arch_sync_dma_for_cpu_all hook")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Paul Burton <paul.burton@mips.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-09-25 15:11:58 -07:00