Commit Graph

6563 Commits

Author SHA1 Message Date
Linus Torvalds d8fce2db72 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "Mostly tooling fixes, but also an uncore PMU driver fix and an uncore
  PMU driver hardware-enablement addition"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf probe: Fix segfault if passed with ''.
  perf report: Fix -T/--threads option to work again
  perf bench numa: Fix immediate meeting of convergence condition
  perf bench numa: Fixes of --quiet argument
  perf bench futex: Fix hung wakeup tasks after requeueing
  perf probe: Fix bug with global variables handling
  perf top: Fix a segfault when kernel map is restricted.
  tools lib traceevent: Fix build failure on 32-bit arch
  perf kmem: Fix compiles on RHEL6/OL6
  tools lib api: Undefine _FORTIFY_SOURCE before setting it
  perf kmem: Consistently use PRIu64 for printing u64 values
  perf trace: Disable events and drain events when forked workload ends
  perf trace: Enable events when doing system wide tracing and starting a workload
  perf/x86/intel/uncore: Move PCI IDs for IMC to uncore driver
  perf/x86/intel/uncore: Add support for Intel Haswell ULT (lower power Mobile Processor) IMC uncore PMUs
  perf/x86/intel: Add cpu_(prepare|starting|dying) for core_pmu
2015-05-06 10:47:25 -07:00
Wang Nan e59d29e88f perf probe: Fix segfault if passed with ''.
Since parse_perf_probe_point() deals with a user passed argument, we
should not assume it to be a valid string.

Without this patch, if pass '' to perf probe, a segfault raises:

 $ perf probe -a ''
 Segmentation fault

This patch checks argument of parse_perf_probe_point() before
string processing.

After this patch:

 $ perf probe -a ''

  usage: perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]
     or: perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]
     ...

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1430210769-94177-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-05-05 12:26:52 -03:00
Namhyung Kim e944ec2ca0 perf report: Fix -T/--threads option to work again
The commit 512ae1bd6a ("perf tools: Consolidate management of default
sort orders") changed default value of the 'sort_order' variable to NULL
indicating that users don't set any sort keys on the command line.

However it missed to update a check in perf_evlist__tty_browse_hists()
so that 'perf report -T' cannot show the per-thread values after the
normal output.  This patch fixes it to work again.

Note that the -T option only works on --stdio and neither --sort nor
--parent option was given.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1430309328-28317-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-05-01 10:13:30 -03:00
Michael Ellerman 2fa30fe957 selftests/powerpc: Fix the pmu install rule
My patch to add install support for the powerpc selftests had a typo,
leading to the three tests in the pmu directory itself not being
installed.

Fixes: 6faeeea44b ("selftests: Add install support for the powerpc tests")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-05-01 13:00:26 +10:00
Michael Ellerman 68fc378ce3 Revert "powerpc/tm: Abort syscalls in active transactions"
This reverts commit feba40362b.

Although the principle of this change is good, the implementation has a
few issues.

Firstly we can sometimes fail to abort a syscall because r12 may have
been clobbered by C code if we went down the virtual CPU accounting
path, or if syscall tracing was enabled.

Secondly we have decided that it is safer to abort the syscall even
earlier in the syscall entry path, so that we avoid the syscall tracing
path when we are transactional.

So that we have time to thoroughly test those changes we have decided to
revert this for this merge window and will merge the fixed version in
the next window.

NB. Rather than reverting the selftest we just drop tm-syscall from
TEST_PROGS so that it's not run by default.

Fixes: feba40362b ("powerpc/tm: Abort syscalls in active transactions")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-04-30 15:24:58 +10:00
Petr Holasek 1d90a685eb perf bench numa: Fix immediate meeting of convergence condition
This patch fixes the race in the beginning of benchmark run when some
threads hasn't got assigned curr_cpu yet so they don't occur in
nodes-of-process stats and benchmark concludes that all remaining
threads are converged already.

The race can be reproduced with small amount of threads and some bigger
amount of shared process memory, e.g. one process, two threads and 5GB
of process memory.

Signed-off-by: Petr Holasek <pholasek@redhat.com>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1429198699-25039-4-git-send-email-pholasek@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-27 13:57:50 -03:00
Petr Holasek 24f1ced167 perf bench numa: Fixes of --quiet argument
Corrected description and fixed function of --quiet argument.

Signed-off-by: Petr Holasek <pholasek@redhat.com>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1429198699-25039-2-git-send-email-pholasek@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-27 13:57:49 -03:00
Davidlohr Bueso 052b0f6eaf perf bench futex: Fix hung wakeup tasks after requeueing
The futex-requeue benchmark can hang because of missing wakeups once the
benchmark is done, ie:

[Run 1]: Requeued 1024 of 1024 threads in 0.3290 ms
perf: couldn't wakeup all tasks (135/1024)

This bug, while perhaps suggesting missing wakeups in kernel futex code,
is merely a consequence of the crappy FUTEX_CMP_REQUEUE man page,
incorrectly mentioning that the number of requeued tasks is in fact
returned, not the wakeups.

This patch acknowledges this and updates the corresponding futex_wake
code around it.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Mel Gorman <mgorman@suse.de>
Link: http://lkml.kernel.org/r/1429894848.10273.44.camel@stgolabs.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-27 13:57:49 -03:00
He Kuang d13855ef18 perf probe: Fix bug with global variables handling
There are missing curly braces which causes find_variable() return wrong
value when probing with global variables.

This problem can be reproduced as following:

  $ perf probe -v --add='generic_perform_write global_variable_for_test'
  ...
  Try to find probe point from debuginfo.
  Probe point found: generic_perform_write+0
  Searching 'global_variable_for_test' variable in context.
  An error occurred in debuginfo analysis (-2).
    Error: Failed to add events. Reason: No such file or directory (Code: -2)

After this patch:

  $ perf probe -v --add='generic_perform_write global_variable_for_test'
  ...
  Converting variable global_variable_for_test into trace event.
  global_variable_for_test type is int.
  Found 1 probe_trace_events.
  Opening /sys/kernel/debug/tracing/kprobe_events write=1
  Added new event:
  Writing event: p:probe/generic_perform_write _stext+1237464
  global_variable_for_test=@global_variable_for_test+0:s32
    probe:generic_perform_write (on generic_perform_write with
    global_variable_for_test)

  You can now use it in all perf tools, such as:

      perf record -e probe:generic_perform_write -aR sleep 1

Signed-off-by: He Kuang <hekuang@huawei.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1429949338-18678-1-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-27 13:57:29 -03:00
Wang Nan c671835021 perf top: Fix a segfault when kernel map is restricted.
Perf top raise a warning if a kernel sample is collected but kernel map
is restricted. The warning message needs to dereference al.map->dso...

However, previous perf_event__preprocess_sample() doesn't always
guarantee al.map != NULL, for example, when kernel map is restricted.

This patch validates al.map before dereferencing, avoid the segfault.

Before this patch:

 $ cat /proc/sys/kernel/kptr_restrict
 1
 $ perf top -p  120183
 perf: Segmentation fault
 -------- backtrace --------
 /path/to/perf[0x509868]
 /lib64/libc.so.6(+0x3545f)[0x7f9a1540045f]
 /path/to/perf[0x448820]
 /path/to/perf(cmd_top+0xe3c)[0x44a5dc]
 /path/to/perf[0x4766a2]
 /path/to/perf(main+0x5f5)[0x42e545]
 /lib64/libc.so.6(__libc_start_main+0xf4)[0x7f9a153ecbd4]
 /path/to/perf[0x42e674]

And gdb call trace:

 Program received signal SIGSEGV, Segmentation fault.
 perf_event__process_sample (machine=0xa44030, sample=0x7fffffffa4c0, evsel=0xa43b00, event=0x7ffff41c3000, tool=0x7fffffffa8a0)
    at builtin-top.c:736
 736				  !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
 (gdb) bt
 #0  perf_event__process_sample (machine=0xa44030, sample=0x7fffffffa4c0, evsel=0xa43b00, event=0x7ffff41c3000, tool=0x7fffffffa8a0)
     at builtin-top.c:736
 #1  perf_top__mmap_read_idx (top=top@entry=0x7fffffffa8a0, idx=idx@entry=0) at builtin-top.c:855
 #2  0x000000000044a5dd in perf_top__mmap_read (top=0x7fffffffa8a0) at builtin-top.c:872
 #3  __cmd_top (top=0x7fffffffa8a0) at builtin-top.c:997
 #4  cmd_top (argc=<optimized out>, argv=<optimized out>, prefix=<optimized out>) at builtin-top.c:1267
 #5  0x00000000004766a3 in run_builtin (p=p@entry=0x8a6ce8 <commands+264>, argc=argc@entry=3, argv=argv@entry=0x7fffffffdf70)
      at perf.c:371
 #6  0x000000000042e546 in handle_internal_command (argv=0x7fffffffdf70, argc=3) at perf.c:430
 #7  run_argv (argv=0x7fffffffdcf0, argcp=0x7fffffffdcfc) at perf.c:474
 #8  main (argc=3, argv=0x7fffffffdf70) at perf.c:589
 (gdb)

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1429946703-80807-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-27 13:24:32 -03:00
Linus Torvalds c8b3fd0ce3 More power management and ACPI updates for v4.1-rc1
- Fix a build warning in the intel_pstate driver showing up in non-SMP
    builds (Borislav Petkov).
 
  - Change one of the intel_pstate's P-state selection parameters for
    Baytrail and Cherrytrail CPUs to significantly improve performance
    at the cost of a small increase in energy consumption (Kristen
    Carlson Accardi).
 
  - Fix a NULL pointer dereference in the ACPI EC driver due to an unsafe
    list walk in the query handler removal routine (Chris Bainbridge).
 
  - Get rid of a false-positive lockdep warning in the ACPI container
    hot-remove code (Rafael J Wysocki).
 
  - Prevent the ACPI device enumeration code from creating device
    objects of a wrong type in some cases (Rafael J Wysocki).
 
  - Add Skylake processors support to the Intel RAPL power capping
    driver (Brian Bian).
 
  - Drop the stale MAINTAINERS entry for the ACPI dock driver that is
    regarded as part of the ACPI core and maintained along with it now
    (Chao Yu).
 
  - Fix cpupower tool breakage caused by a library API change in libpci
    3.3.0 (Lucas Stach).
 
 /
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Merge tag 'pm+acpi-4.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more power management and ACPI updates from Rafael Wysocki:
 "These are fixes mostly (intel_pstate, ACPI core, ACPI EC driver,
  cpupower tool), a new CPU ID for the Intel RAPL driver and one
  intel_pstate driver improvement that didn't make it to my previous
  pull requests due to timing.

  Specifics:

   - Fix a build warning in the intel_pstate driver showing up in
     non-SMP builds (Borislav Petkov)

   - Change one of the intel_pstate's P-state selection parameters for
     Baytrail and Cherrytrail CPUs to significantly improve performance
     at the cost of a small increase in energy consumption (Kristen
     Carlson Accardi)

   - Fix a NULL pointer dereference in the ACPI EC driver due to an
     unsafe list walk in the query handler removal routine (Chris
     Bainbridge)

   - Get rid of a false-positive lockdep warning in the ACPI container
     hot-remove code (Rafael J Wysocki)

   - Prevent the ACPI device enumeration code from creating device
     objects of a wrong type in some cases (Rafael J Wysocki)

   - Add Skylake processors support to the Intel RAPL power capping
     driver (Brian Bian)

   - Drop the stale MAINTAINERS entry for the ACPI dock driver that is
     regarded as part of the ACPI core and maintained along with it now
     (Chao Yu)

   - Fix cpupower tool breakage caused by a library API change in libpci
     3.3.0 (Lucas Stach)"

* tag 'pm+acpi-4.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / scan: Add a scan handler for PRP0001
  ACPI / scan: Annotate physical_node_lock in acpi_scan_is_offline()
  ACPI / EC: fix NULL pointer dereference in acpi_ec_remove_query_handler()
  MAINTAINERS: remove maintainship entry of docking station driver
  powercap / RAPL: Add support for Intel Skylake processors
  cpufreq: intel_pstate: Fix an annoying !CONFIG_SMP warning
  intel_pstate: Change the setpoint for Atom params
  cpupower: fix breakage from libpci API change
2015-04-26 13:56:35 -07:00
Namhyung Kim 410ceb8f2f tools lib traceevent: Fix build failure on 32-bit arch
In my i386 build, it failed like this:

    CC       event-parse.o
  event-parse.c: In function 'print_str_arg':
  event-parse.c:3868:5: warning: format '%lu' expects argument of type 'long unsigned int',
                        but argument 3 has type 'uint64_t' [-Wformat]

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Javi Merino <javi.merino@arm.com>
Link: http://lkml.kernel.org/r/20150424020218.GF1905@sejong
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-24 12:47:10 -03:00
David Ahern 4ad1f4300e perf kmem: Fix compiles on RHEL6/OL6
0d68bc92c4 breaks compiles on RHEL6/OL6:
    cc1: warnings being treated as errors
    builtin-kmem.c: In function ‘search_page_alloc_stat’:
    builtin-kmem.c:322: error: declaration of ‘stat’ shadows a global declaration
                            node = &parent->rb_left;
    /usr/include/sys/stat.h:455: error: shadowed declaration is here
    builtin-kmem.c: In function ‘perf_evsel__process_page_alloc_event’:
    builtin-kmem.c:378: error: declaration of ‘stat’ shadows a global declaration
    /usr/include/sys/stat.h:455: error: shadowed declaration is here
    builtin-kmem.c: In function ‘perf_evsel__process_page_free_event’:
    builtin-kmem.c:431: error: declaration of ‘stat’ shadows a global declaration
    /usr/include/sys/stat.h:455: error: shadowed declaration is here

Rename local variable to pstat to avoid the name conflict.

Signed-off-by: David Ahern <david.ahern@oracle.com>
Link: http://lkml.kernel.org/r/1429033773-31383-1-git-send-email-david.ahern@oracle.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-24 12:44:47 -03:00
Bobby Powers de28c15daf tools lib api: Undefine _FORTIFY_SOURCE before setting it
Some toolchains (like Hardened Gentoo) define _FORTIFY_SOURCE in the
built-in, default args.  This causes perf builds to fail with:

<command-line>:0:0: error: "_FORTIFY_SOURCE" redefined [-Werror]
<built-in>: note: this is the location of the previous definition cc1:
all warnings being treated as errors

To avoid this, undefine _FORTIFY_SOURCE before (possibly re-)defining it
in tools/lib/api.

v2 applies cleanly on top of already pulled kbuild changes for 4.1-rc1.

Signed-off-by: Bobby Powers <bobbypowers@gmail.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Dirk Gouders <dirk@gouders.net>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linux-kbuild@vger.kernel.org
Link: http://lkml.kernel.org/r/1429658381-3039-1-git-send-email-bobbypowers@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-23 17:08:23 -03:00
Will Deacon 6145c259cd perf kmem: Consistently use PRIu64 for printing u64 values
Building the perf tool for 32-bit ARM results in the following build
error due to a combination of an incorrect conversion specifier and
compiling with -Werror:

  builtin-kmem.c: In function ‘print_page_summary’:
  builtin-kmem.c:644:9: error: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 3 has type ‘u64’ [-Werror=format=]
           nr_alloc_freed, (total_alloc_freed_bytes) / 1024);
           ^
  builtin-kmem.c:647:9: error: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 3 has type ‘u64’ [-Werror=format=]
           (total_page_alloc_bytes - total_alloc_freed_bytes) / 1024);
           ^
  cc1: all warnings being treated as errors

This patch fixes the problem by consistently using PRIu64 for printing
out u64 values.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1429796437-1790-1-git-send-email-will.deacon@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-23 17:08:22 -03:00
Arnaldo Carvalho de Melo 02ac5421dd perf trace: Disable events and drain events when forked workload ends
We were not checking in the inner event processing loop if the forked workload
had finished, which, on a busy system, may make it take a long time trying to
drain events, entering a seemingly neverending loop, waiting for the system to
get idle enough to make it drain the buffers.

Fix it by disabling the events when 'done' is true, in the inner loop, to start
draining what is in the buffers.

Now:

[root@ssdandy ~]# time trace --filter-pids 14003 -a sleep 1 | tail
  996.748 ( 0.002 ms): sh/30296 rt_sigprocmask(how: SETMASK, nset: 0x7ffc83418160, sigsetsize: 8) = 0
  996.751 ( 0.002 ms): sh/30296 rt_sigprocmask(how: BLOCK, nset: 0x7ffc834181f0, oset: 0x7ffc83418270, sigsetsize: 8) = 0
  996.755 ( 0.002 ms): sh/30296 rt_sigaction(sig: INT, act: 0x7ffc83417f50, oact: 0x7ffc83417ff0, sigsetsize: 8) = 0
 1004.543 ( 0.362 ms): tail/30198  ... [continued]: read()) = 4096
 1004.548 ( 7.791 ms): sh/30296 wait4(upid: -1, stat_addr: 0x7ffc834181a0) ...
 1004.975 ( 0.427 ms): tail/30198 read(buf: 0x7633f0, count: 8192) = 4096
 1005.390 ( 0.410 ms): tail/30198 read(buf: 0x765410, count: 8192) = 4096
 1005.743 ( 0.348 ms): tail/30198 read(buf: 0x7633f0, count: 8192) = 4096
 1006.197 ( 0.449 ms): tail/30198 read(buf: 0x765410, count: 8192) = 4096
 1006.492 ( 0.290 ms): tail/30198 read(buf: 0x7633f0, count: 8192) = 4096

real	0m1.219s
user	0m0.704s
sys	0m0.331s
[root@ssdandy ~]#

Reported-by: Michael Petlan <mpetlan@redhat.com>
Suggested-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-p6kpn1b26qcbe47pufpw0tex@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-23 17:08:08 -03:00
Arnaldo Carvalho de Melo cb24d01d21 perf trace: Enable events when doing system wide tracing and starting a workload
commit f7aa222ff3
 Author: Arnaldo Carvalho de Melo <acme@redhat.com>
 Date:   Tue Feb 3 13:25:39 2015 -0300

    perf trace: No need to enable evsels for workload started from perf

The assumption was that whenever a workload is specified, the
attr.enable_on_exec evsel flag would be set, but that is not happening
when perf_record_opts.system_wide is set, for instance

That resulted in both perf_evlist__enable() and attr.enable_on_exec
being not called/set, which made the events to remain disabled while the
workload runs, producing no output.

Fix it,  by calling perf_evlist__enable() in the 'trace' tool
when forking and not targetting a workload started from trace

v2: Test against !target__none(), as suggested by Namhyung Kim, that is
what is used in perf_evsel__config() when deciding if the
attr.enable_on_exec flag to be set. More work is needed to cover other
cases such as opts->initial_delay.

Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-27z7169pvfxgj8upic636syv@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-23 17:07:59 -03:00
Linus Torvalds 1fc149933f Char/Misc driver patches for 4.1-rc1
Here's the big char/misc driver patchset for 4.1-rc1.
 
 Lots of different driver subsystem updates here, nothing major, full
 details are in the shortlog below.
 
 All of this has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here's the big char/misc driver patchset for 4.1-rc1.

  Lots of different driver subsystem updates here, nothing major, full
  details are in the shortlog.

  All of this has been in linux-next for a while"

* tag 'char-misc-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (133 commits)
  mei: trace: remove unused TRACE_SYSTEM_STRING
  DTS: ARM: OMAP3-N900: Add lis3lv02d support
  Documentation: DT: lis302: update wakeup binding
  lis3lv02d: DT: add wakeup unit 2 and wakeup threshold
  lis3lv02d: DT: use s32 to support negative values
  Drivers: hv: hv_balloon: correctly handle num_pages>INT_MAX case
  Drivers: hv: hv_balloon: correctly handle val.freeram<num_pages case
  mei: replace check for connection instead of transitioning
  mei: use mei_cl_is_connected consistently
  mei: fix mei_poll operation
  hv_vmbus: Add gradually increased delay for retries in vmbus_post_msg()
  Drivers: hv: hv_balloon: survive ballooning request with num_pages=0
  Drivers: hv: hv_balloon: eliminate jumps in piecewiese linear floor function
  Drivers: hv: hv_balloon: do not online pages in offline blocks
  hv: remove the per-channel workqueue
  hv: don't schedule new works in vmbus_onoffer()/vmbus_onoffer_rescind()
  hv: run non-blocking message handlers in the dispatch tasklet
  coresight: moving to new "hwtracing" directory
  coresight-tmc: Adding a status interface to sysfs
  coresight: remove the unnecessary configuration coresight-default-sink
  ...
2015-04-21 09:42:58 -07:00
Linus Torvalds 09d51602cf Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Pull turbostat update from Len Brown:
 "Updates to the turbostat utility.

  Just one kernel dependency in this batch -- added a #define to
  msr-index.h"

* 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
  tools/power turbostat: correct dumped pkg-cstate-limit value
  tools/power turbostat: calculate TSC frequency from CPUID(0x15) on SKL
  tools/power turbostat: correct DRAM RAPL units on recent Xeon processors
  tools/power turbostat: Initial Skylake support
  tools/power turbostat: Use $(CURDIR) instead of $(PWD) and add support for O= option in Makefile
  tools/power turbostat: modprobe msr, if needed
  tools/power turbostat: dump MSR_TURBO_RATIO_LIMIT2
  tools/power turbostat: use new MSR_TURBO_RATIO_LIMIT names
  x86 msr-index: define MSR_TURBO_RATIO_LIMIT,1,2
  tools/power turbostat: label base frequency
  tools/power turbostat: update PERF_LIMIT_REASONS decoding
  tools/power turbostat: simplify default output
2015-04-19 14:31:41 -07:00
Rafael J. Wysocki 2363ccb505 Merge branches 'pm-cpufreq', 'powercap' and 'pm-tools'
* pm-cpufreq:
  cpufreq: intel_pstate: Fix an annoying !CONFIG_SMP warning
  intel_pstate: Change the setpoint for Atom params

* powercap:
  powercap / RAPL: Add support for Intel Skylake processors

* pm-tools:
  cpupower: fix breakage from libpci API change
2015-04-19 21:19:27 +02:00
Len Brown e9257f5fa4 tools/power turbostat: correct dumped pkg-cstate-limit value
HSW expanded MSR_PKG_CST_CONFIG_CONTROL.Package-C-State-Limit,
from bits[2:0] used by previous implementations, to [3:0].
The value 1000b is unlimited, and is used by BDW and SKL too.

Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-18 14:20:52 -04:00
Len Brown 8a5bdf41d2 tools/power turbostat: calculate TSC frequency from CPUID(0x15) on SKL
turbostat --debug
...
CPUID(0x15): eax_crystal: 2 ebx_tsc: 100 ecx_crystal_hz: 0
TSC: 1200 MHz (24000000 Hz * 100 / 2 / 1000000)

Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-18 14:20:52 -04:00
Andrey Semin 40ee8e3b9d tools/power turbostat: correct DRAM RAPL units on recent Xeon processors
While not yet documented in the Software Developer's Manual,
the data-sheet for modern Xeon states that DRAM RAPL ENERGY units
are fixed at 15.3 uJ, rather than being discovered via MSR.

Before this patch, DRAM energy on these products is over-stated by turbostat
because the RAPL units are 4x larger.

ref: "Xeon E5-2600 v3/E5-1600 v3 Datasheet Volume 2"
http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-e5-v3-datasheet-vol-2.pdf

Signed-off-by: Andrey Semin <andrey.semin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-18 14:20:52 -04:00
Len Brown 0b2bb6925e tools/power turbostat: Initial Skylake support
Skylake adds some additional residency counters.

Skylake supports a different mix of RAPL registers
from any previous product.

In most other ways, Skylake is like Broadwell.

Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-18 14:20:51 -04:00
Thomas D f82263c698 tools/power turbostat: Use $(CURDIR) instead of $(PWD) and add support for O= option in Makefile
Since commit ee0778a301
("tools/power: turbostat: make Makefile a bit more capable")
turbostat's Makefile is using

  [...]
  BUILD_OUTPUT    := $(PWD)
  [...]

which obviously causes trouble when building "turbostat" with

  make -C /usr/src/linux/tools/power/x86/turbostat ARCH=x86 turbostat

because GNU make does not update nor guarantee that $PWD is set.

This patch changes the Makefile to use $CURDIR instead, which GNU make
guarantees to set and update (i.e. when using "make -C ...") and also
adds support for the O= option (see "make help" in your root of your
kernel source tree for more details).

Link: https://bugs.gentoo.org/show_bug.cgi?id=533918
Fixes: ee0778a301 ("tools/power: turbostat: make Makefile a bit more capable")
Signed-off-by: Thomas D. <whissi@whissi.de>
Cc: Mark Asselstine <mark.asselstine@windriver.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-18 14:20:51 -04:00
Len Brown a21d38c846 tools/power turbostat: modprobe msr, if needed
Some distros (Ubuntu) ship the msr driver as a module.
If turbosat is run as root on those systems, and discovers
that there is no /dev/cpu/cpu0/msr, it will now "modprobe msr"
for the user.

If not root, the modprobe attempt will fail, and turbostat will exit as before:

turbostat: no /dev/cpu/0/msr, Try "# modprobe msr" : No such file or directory

Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-18 14:20:51 -04:00
Len Brown fcd17211bd tools/power turbostat: dump MSR_TURBO_RATIO_LIMIT2
and up to 18 cores of turbo ratio limit
when using the turbostat --debug option.

Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-18 14:20:50 -04:00
Len Brown 12bb43c615 tools/power turbostat: use new MSR_TURBO_RATIO_LIMIT names
s/MSR_NHM_TURBO_RATIO_LIMIT/MSR_TURBO_RATIO_LIMIT/
s/MSR_IVT_TURBO_RATIO_LIMIT/MSR_TURBO_RATIO_LIMIT1/

syntax only -- use the documented strings describing these registers.

Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-18 14:20:50 -04:00
Linus Torvalds 90d1c08786 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "This tree includes:

   - an FPU related crash fix

   - a ptrace fix (with matching testcase in tools/testing/selftests/)

   - an x86 Kconfig DMA-config defaults tweak to better avoid
     non-working drivers"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  config: Enable NEED_DMA_MAP_STATE by default when SWIOTLB is selected
  x86/fpu: Load xsave pointer *after* initialization
  x86/ptrace: Fix the TIF_FORCED_TF logic in handle_signal()
  x86, selftests: Add single_step_syscall test
2015-04-18 11:31:11 -04:00
Linus Torvalds 96b90f27bc Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
 "This update has mostly fixes, but also other bits:

   - perf tooling fixes

   - PMU driver fixes

   - Intel Broadwell PMU driver HW-enablement for LBR callstacks

   - a late coming 'perf kmem' tool update that enables it to also
     analyze page allocation data.  Note, this comes with MM tracepoint
     changes that we believe to not break anything: because it changes
     the formerly opaque 'struct page *' field that uniquely identifies
     pages to 'pfn' which identifies pages uniquely too, but isn't as
     opaque and can be used for other purposes as well"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/pt: Fix and clean up error handling in pt_event_add()
  perf/x86/intel: Add Broadwell support for the LBR callstack
  perf/x86/intel/rapl: Fix energy counter measurements but supporing per domain energy units
  perf/x86/intel: Fix Core2,Atom,NHM,WSM cycles:pp events
  perf/x86: Fix hw_perf_event::flags collision
  perf probe: Fix segfault when probe with lazy_line to file
  perf probe: Find compilation directory path for lazy matching
  perf probe: Set retprobe flag when probe in address-based alternative mode
  perf kmem: Analyze page allocator events also
  tracing, mm: Record pfn instead of pointer to struct page
2015-04-18 11:26:46 -04:00
Linus Torvalds 0f5abd4020 ACPICA updates for v4.1-rc1
- Fix for a GPE handling regression on Dell Latitude D600 that
    caused GPE signaling to stop working on that machine, which
    appears to be due to a hardware glitch, but it used to work
    and it can be made work again in a relativly straightforward
    way (Rafael J Wysocki).
 
  - Fix for a mutex unlock regression related to the handling of ACPI
    tables introduced during the 3.16 development cycle (Octavian Purdila).
 
  - _REV modification to always return 2 which has been done by all
    versions of Windows since NT and the firmware people started to
    use it to distinguish between OSes in their AML and do some silly
    and wrong things on that basis (Bob Moore).
 
  - Fixes and cleanups related to the acpi_physicall_address data type
    including one stable-candidate fix for an issue occasionally occuring
    on 64-bit machines running 32-bit kernels where using offsets provided
    by the firmware may lead to address overflows (Lv Zheng).
 
  - External() opcode support infrastructure needed for recompiling
    disassembled ACPI tables in some cases including interpreter
    modification to ignore that opcode (Bob Moore).
 
  - Support for the "Windows 2015" string in _OSI (Bob Moore).
 
  - GPE debug interface change to return values read from hardware
    registers (Lv Zheng).
 
  - Removal of the __DATE__ macro usage in tools (Rasmus Villemoes).
 
  - Assorted minor fixes and cleanups (Lv Zheng, Rickard Strandqvist,
    Bob Moore).
 
 /
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Merge tag 'acpica-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPICA updates from Rafael Wysocki:
 "This updates the kernel's ACPICA code to upstream revision 20150410
  and adds a fix for a GPE handling regression introduced during the
  3.19 cycle on top of that.

  Included are two stable-candidate bug fixes (one of them fixing a 3.16
  regression), multiple other fixes and a bunch of cleanups.

  Specifics:

   - Fix for a GPE handling regression on Dell Latitude D600 that caused
     GPE signaling to stop working on that machine, which appears to be
     due to a hardware glitch, but it used to work and it can be made
     work again in a relativly straightforward way (Rafael J Wysocki).

   - Fix for a mutex unlock regression related to the handling of ACPI
     tables introduced during the 3.16 development cycle (Octavian
     Purdila).

   - _REV modification to always return 2 which has been done by all
     versions of Windows since NT and the firmware people started to use
     it to distinguish between OSes in their AML and do some silly and
     wrong things on that basis (Bob Moore).

   - Fixes and cleanups related to the acpi_physicall_address data type
     including one stable-candidate fix for an issue occasionally
     occuring on 64-bit machines running 32-bit kernels where using
     offsets provided by the firmware may lead to address overflows (Lv
     Zheng).

   - External() opcode support infrastructure needed for recompiling
     disassembled ACPI tables in some cases including interpreter
     modification to ignore that opcode (Bob Moore).

   - Support for the "Windows 2015" string in _OSI (Bob Moore).

   - GPE debug interface change to return values read from hardware
     registers (Lv Zheng).

   - Removal of the __DATE__ macro usage in tools (Rasmus Villemoes).

   - Assorted minor fixes and cleanups (Lv Zheng, Rickard Strandqvist,
     Bob Moore)"

* tag 'acpica-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits)
  ACPICA: Store GPE register enable masks upfront
  ACPICA: Update version to 20150410.
  ACPICA: Fix a couple issues with the local printf module.
  ACPICA: Disassembler: Some cleanup of the table dump module.
  ACPICA: iASL: Add support for MSDM ACPI table.
  ACPICA: Update for SLIC ACPI table.
  ACPICA: Add "//" before ascii output of buffers.
  ACPICA: Remove unused internal AML opcode.
  ACPICA: Permanently set _REV to the value '2'.
  ACPICA: Add "Windows 2015" string to _OSI support.
  ACPICA: Add infrastructure for External() opcode.
  ACPICA: iASL: Enhancement for constant folding.
  ACPICA: iASL/Disassembler: Add option to assume table contains valid AML.
  ACPICA: Update AML Debugger global variables.
  ACPICA: Update Resource descriptor dump module.
  ACPICA: Fix a sscanf format string.
  ACPICA: Casting changes around acpi_physical_address/acpi_size.
  ACPICA: Resources: Correct conditional compilation definitions.
  ACPICA: Utilities: Correct conditional compilation definitions.
  ACPICA: Tables: Move an iasl specific table function to iasl source file.
  ...
2015-04-17 15:01:29 -04:00
Linus Torvalds d19d5efd8c powerpc updates for 4.1
- Numerous minor fixes, cleanups etc.
 - More EEH work from Gavin to remove its dependency on device_nodes.
 - Memory hotplug implemented entirely in the kernel from Nathan Fontenot.
 - Removal of redundant CONFIG_PPC_OF by Kevin Hao.
 - Rewrite of VPHN parsing logic & tests from Greg Kurz.
 - A fix from Nish Aravamudan to reduce memory usage by clamping
   nodes_possible_map.
 - Support for pstore on powernv from Hari Bathini.
 - Removal of old powerpc specific byte swap routines by David Gibson.
 - Fix from Vasant Hegde to prevent the flash driver telling you it was flashing
   your firmware when it wasn't.
 - Patch from Ben Herrenschmidt to add an OPAL heartbeat driver.
 - Fix for an oops causing get/put_cpu_var() imbalance in perf by Jan Stancek.
 - Some fixes for migration from Tyrel Datwyler.
 - A new syscall to switch the cpu endian by Michael Ellerman.
 - Large series from Wei Yang to implement SRIOV, reviewed and acked by Bjorn.
 - A fix for the OPAL sensor driver from Cédric Le Goater.
 - Fixes to get STRICT_MM_TYPECHECKS building again by Michael Ellerman.
 - Large series from Daniel Axtens to make our PCI hooks per PHB rather than per
   machine.
 - Small patch from Sam Bobroff to explicitly abort non-suspended transactions
   on syscalls, plus a test to exercise it.
 - Numerous reworks and fixes for the 24x7 PMU from Sukadev Bhattiprolu.
 - Small patch to enable the hard lockup detector from Anton Blanchard.
 - Fix from Dave Olson for missing L2 cache information on some CPUs.
 - Some fixes from Michael Ellerman to get Cell machines booting again.
 - Freescale updates from Scott: Highlights include BMan device tree nodes, an
   MSI erratum workaround, a couple minor performance improvements, config
   updates, and misc fixes/cleanup.
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Merge tag 'powerpc-4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux

Pull powerpc updates from Michael Ellerman:

 - Numerous minor fixes, cleanups etc.

 - More EEH work from Gavin to remove its dependency on device_nodes.

 - Memory hotplug implemented entirely in the kernel from Nathan
   Fontenot.

 - Removal of redundant CONFIG_PPC_OF by Kevin Hao.

 - Rewrite of VPHN parsing logic & tests from Greg Kurz.

 - A fix from Nish Aravamudan to reduce memory usage by clamping
   nodes_possible_map.

 - Support for pstore on powernv from Hari Bathini.

 - Removal of old powerpc specific byte swap routines by David Gibson.

 - Fix from Vasant Hegde to prevent the flash driver telling you it was
   flashing your firmware when it wasn't.

 - Patch from Ben Herrenschmidt to add an OPAL heartbeat driver.

 - Fix for an oops causing get/put_cpu_var() imbalance in perf by Jan
   Stancek.

 - Some fixes for migration from Tyrel Datwyler.

 - A new syscall to switch the cpu endian by Michael Ellerman.

 - Large series from Wei Yang to implement SRIOV, reviewed and acked by
   Bjorn.

 - A fix for the OPAL sensor driver from Cédric Le Goater.

 - Fixes to get STRICT_MM_TYPECHECKS building again by Michael Ellerman.

 - Large series from Daniel Axtens to make our PCI hooks per PHB rather
   than per machine.

 - Small patch from Sam Bobroff to explicitly abort non-suspended
   transactions on syscalls, plus a test to exercise it.

 - Numerous reworks and fixes for the 24x7 PMU from Sukadev Bhattiprolu.

 - Small patch to enable the hard lockup detector from Anton Blanchard.

 - Fix from Dave Olson for missing L2 cache information on some CPUs.

 - Some fixes from Michael Ellerman to get Cell machines booting again.

 - Freescale updates from Scott: Highlights include BMan device tree
   nodes, an MSI erratum workaround, a couple minor performance
   improvements, config updates, and misc fixes/cleanup.

* tag 'powerpc-4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (196 commits)
  powerpc/powermac: Fix build error seen with powermac smp builds
  powerpc/pseries: Fix compile of memory hotplug without CONFIG_MEMORY_HOTREMOVE
  powerpc: Remove PPC32 code from pseries specific find_and_init_phbs()
  powerpc/cell: Fix iommu breakage caused by controller_ops change
  powerpc/eeh: Fix crash in eeh_add_device_early() on Cell
  powerpc/perf: Cap 64bit userspace backtraces to PERF_MAX_STACK_DEPTH
  powerpc/perf/hv-24x7: Fail 24x7 initcall if create_events_from_catalog() fails
  powerpc/pseries: Correct memory hotplug locking
  powerpc: Fix missing L2 cache size in /sys/devices/system/cpu
  powerpc: Add ppc64 hard lockup detector support
  oprofile: Disable oprofile NMI timer on ppc64
  powerpc/perf/hv-24x7: Add missing put_cpu_var()
  powerpc/perf/hv-24x7: Break up single_24x7_request
  powerpc/perf/hv-24x7: Define update_event_count()
  powerpc/perf/hv-24x7: Whitespace cleanup
  powerpc/perf/hv-24x7: Define add_event_to_24x7_request()
  powerpc/perf/hv-24x7: Rename hv_24x7_event_update
  powerpc/perf/hv-24x7: Move debug prints to separate function
  powerpc/perf/hv-24x7: Drop event_24x7_request()
  powerpc/perf/hv-24x7: Use pr_devel() to log message
  ...

Conflicts:
	tools/testing/selftests/powerpc/Makefile
	tools/testing/selftests/powerpc/tm/Makefile
2015-04-16 13:53:32 -05:00
Andy Lutomirski 0a15584d72 x86, selftests: Add single_step_syscall test
This is a very simple test that makes system calls with TF set.

This test currently fails when running the 32-bit build on a
64-bit kernel on an Intel CPU.  This bug will be fixed by the
next commit.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Shuah Khan <shuah.kh@samsung.com>
Link: http://lkml.kernel.org/r/20e68021155f6ab5c60590dcad81d37c68ea2c4f.1429139075.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-16 12:41:49 +02:00
David Rientjes 215ba78115 mm, selftests: test return value of munmap for MAP_HUGETLB memory
When MAP_HUGETLB memory is unmapped, the length must be hugepage aligned,
otherwise it fails with -EINVAL.

All tests currently behave correctly, but it's better to explcitly test
the return value for completeness and document the requirement, especially
if users copy map_hugetlb.c as a sample implementation.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Joern Engel <joern@logfs.org>
Cc: Jianguo Wu <wujianguo@huawei.com>
Cc: Eric B Munson <emunson@akamai.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-15 16:35:19 -07:00
Lucas Stach 06b230e3dd cpupower: fix breakage from libpci API change
libpci 3.3.0 introduced an additional member in the pci_filter struct
which needs to be initialized to -1 to get the same behavior as before
the API change. The libpci internal helpers got updated accordingly,
but as the cpupower pci helpers initialized the struct themselves the
behavior changed.

Use the libpci helper pci_filter_init() to fix this and guard against
similar breakages in the future.

This fixes probing of the AMD fam12h/14h cpuidle monitor on systems
with libpci >= 3.3.0.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Acked-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-04-15 21:54:26 +02:00
Linus Torvalds 6c373ca893 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:

 1) Add BQL support to via-rhine, from Tino Reichardt.

 2) Integrate SWITCHDEV layer support into the DSA layer, so DSA drivers
    can support hw switch offloading.  From Floria Fainelli.

 3) Allow 'ip address' commands to initiate multicast group join/leave,
    from Madhu Challa.

 4) Many ipv4 FIB lookup optimizations from Alexander Duyck.

 5) Support EBPF in cls_bpf classifier and act_bpf action, from Daniel
    Borkmann.

 6) Remove the ugly compat support in ARP for ugly layers like ax25,
    rose, etc.  And use this to clean up the neigh layer, then use it to
    implement MPLS support.  All from Eric Biederman.

 7) Support L3 forwarding offloading in switches, from Scott Feldman.

 8) Collapse the LOCAL and MAIN ipv4 FIB tables when possible, to speed
    up route lookups even further.  From Alexander Duyck.

 9) Many improvements and bug fixes to the rhashtable implementation,
    from Herbert Xu and Thomas Graf.  In particular, in the case where
    an rhashtable user bulk adds a large number of items into an empty
    table, we expand the table much more sanely.

10) Don't make the tcp_metrics hash table per-namespace, from Eric
    Biederman.

11) Extend EBPF to access SKB fields, from Alexei Starovoitov.

12) Split out new connection request sockets so that they can be
    established in the main hash table.  Much less false sharing since
    hash lookups go direct to the request sockets instead of having to
    go first to the listener then to the request socks hashed
    underneath.  From Eric Dumazet.

13) Add async I/O support for crytpo AF_ALG sockets, from Tadeusz Struk.

14) Support stable privacy address generation for RFC7217 in IPV6.  From
    Hannes Frederic Sowa.

15) Hash network namespace into IP frag IDs, also from Hannes Frederic
    Sowa.

16) Convert PTP get/set methods to use 64-bit time, from Richard
    Cochran.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1816 commits)
  fm10k: Bump driver version to 0.15.2
  fm10k: corrected VF multicast update
  fm10k: mbx_update_max_size does not drop all oversized messages
  fm10k: reset head instead of calling update_max_size
  fm10k: renamed mbx_tx_dropped to mbx_tx_oversized
  fm10k: update xcast mode before synchronizing multicast addresses
  fm10k: start service timer on probe
  fm10k: fix function header comment
  fm10k: comment next_vf_mbx flow
  fm10k: don't handle mailbox events in iov_event path and always process mailbox
  fm10k: use separate workqueue for fm10k driver
  fm10k: Set PF queues to unlimited bandwidth during virtualization
  fm10k: expose tx_timeout_count as an ethtool stat
  fm10k: only increment tx_timeout_count in Tx hang path
  fm10k: remove extraneous "Reset interface" message
  fm10k: separate PF only stats so that VF does not display them
  fm10k: use hw->mac.max_queues for stats
  fm10k: only show actual queues, not the maximum in hardware
  fm10k: allow creation of VLAN on default vid
  fm10k: fix unused warnings
  ...
2015-04-15 09:00:47 -07:00
Linus Torvalds 6c8a53c9e6 Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf changes from Ingo Molnar:
 "Core kernel changes:

   - One of the more interesting features in this cycle is the ability
     to attach eBPF programs (user-defined, sandboxed bytecode executed
     by the kernel) to kprobes.

     This allows user-defined instrumentation on a live kernel image
     that can never crash, hang or interfere with the kernel negatively.
     (Right now it's limited to root-only, but in the future we might
     allow unprivileged use as well.)

     (Alexei Starovoitov)

   - Another non-trivial feature is per event clockid support: this
     allows, amongst other things, the selection of different clock
     sources for event timestamps traced via perf.

     This feature is sought by people who'd like to merge perf generated
     events with external events that were measured with different
     clocks:

       - cluster wide profiling

       - for system wide tracing with user-space events,

       - JIT profiling events

     etc.  Matching perf tooling support is added as well, available via
     the -k, --clockid <clockid> parameter to perf record et al.

     (Peter Zijlstra)

  Hardware enablement kernel changes:

   - x86 Intel Processor Trace (PT) support: which is a hardware tracer
     on steroids, available on Broadwell CPUs.

     The hardware trace stream is directly output into the user-space
     ring-buffer, using the 'AUX' data format extension that was added
     to the perf core to support hardware constraints such as the
     necessity to have the tracing buffer physically contiguous.

     This patch-set was developed for two years and this is the result.
     A simple way to make use of this is to use BTS tracing, the PT
     driver emulates BTS output - available via the 'intel_bts' PMU.
     More explicit PT specific tooling support is in the works as well -
     will probably be ready by 4.2.

     (Alexander Shishkin, Peter Zijlstra)

   - x86 Intel Cache QoS Monitoring (CQM) support: this is a hardware
     feature of Intel Xeon CPUs that allows the measurement and
     allocation/partitioning of caches to individual workloads.

     These kernel changes expose the measurement side as a new PMU
     driver, which exposes various QoS related PMU events.  (The
     partitioning change is work in progress and is planned to be merged
     as a cgroup extension.)

     (Matt Fleming, Peter Zijlstra; CPU feature detection by Peter P
     Waskiewicz Jr)

   - x86 Intel Haswell LBR call stack support: this is a new Haswell
     feature that allows the hardware recording of call chains, plus
     tooling support.  To activate this feature you have to enable it
     via the new 'lbr' call-graph recording option:

        perf record --call-graph lbr
        perf report

     or:

        perf top --call-graph lbr

     This hardware feature is a lot faster than stack walk or dwarf
     based unwinding, but has some limitations:

       - It reuses the current LBR facility, so LBR call stack and
         branch record can not be enabled at the same time.

       - It is only available for user-space callchains.

     (Yan, Zheng)

   - x86 Intel Broadwell CPU support and various event constraints and
     event table fixes for earlier models.

     (Andi Kleen)

   - x86 Intel HT CPUs event scheduling workarounds.  This is a complex
     CPU bug affecting the SNB,IVB,HSW families that results in counter
     value corruption.  The mitigation code is automatically enabled and
     is transparent.

     (Maria Dimakopoulou, Stephane Eranian)

  The perf tooling side had a ton of changes in this cycle as well, so
  I'm only able to list the user visible changes here, in addition to
  the tooling changes outlined above:

  User visible changes affecting all tools:

      - Improve support of compressed kernel modules (Jiri Olsa)
      - Save DSO loading errno to better report errors (Arnaldo Carvalho de Melo)
      - Bash completion for subcommands (Yunlong Song)
      - Add 'I' event modifier for perf_event_attr.exclude_idle bit (Jiri Olsa)
      - Support missing -f to override perf.data file ownership. (Yunlong Song)
      - Show the first event with an invalid filter (David Ahern, Arnaldo Carvalho de Melo)

  User visible changes in individual tools:

    'perf data':

        New tool for converting perf.data to other formats, initially
        for the CTF (Common Trace Format) from LTTng (Jiri Olsa,
        Sebastian Siewior)

    'perf diff':

        Add --kallsyms option (David Ahern)

    'perf list':

        Allow listing events with 'tracepoint' prefix (Yunlong Song)

        Sort the output of the command (Yunlong Song)

    'perf kmem':

        Respect -i option (Jiri Olsa)

        Print big numbers using thousands' group (Namhyung Kim)

        Allow -v option (Namhyung Kim)

        Fix alignment of slab result table (Namhyung Kim)

    'perf probe':

        Support multiple probes on different binaries on the same command line (Masami Hiramatsu)

        Support unnamed union/structure members data collection. (Masami Hiramatsu)

        Check kprobes blacklist when adding new events. (Masami Hiramatsu)

    'perf record':

        Teach 'perf record' about perf_event_attr.clockid (Peter Zijlstra)

        Support recording running/enabled time (Andi Kleen)

    'perf sched':

        Improve the performance of 'perf sched replay' on high CPU core count machines (Yunlong Song)

    'perf report' and 'perf top':

        Allow annotating entries in callchains in the hists browser (Arnaldo Carvalho de Melo)

        Indicate which callchain entries are annotated in the
        TUI hists browser (Arnaldo Carvalho de Melo)

        Add pid/tid filtering to 'report' and 'script' commands (David Ahern)

        Consider PERF_RECORD_ events with cpumode == 0 in 'perf top', removing one
        cause of long term memory usage buildup, i.e. not processing PERF_RECORD_EXIT
        events (Arnaldo Carvalho de Melo)

    'perf stat':

        Report unsupported events properly (Suzuki K. Poulose)

        Output running time and run/enabled ratio in CSV mode (Andi Kleen)

    'perf trace':

        Handle legacy syscalls tracepoints (David Ahern, Arnaldo Carvalho de Melo)

        Only insert blank duration bracket when tracing syscalls (Arnaldo Carvalho de Melo)

        Filter out the trace pid when no threads are specified (Arnaldo Carvalho de Melo)

        Dump stack on segfaults (Arnaldo Carvalho de Melo)

        No need to explicitely enable evsels for workload started from perf, let it
        be enabled via perf_event_attr.enable_on_exec, removing some events that take
        place in the 'perf trace' before a workload is really started by it.
        (Arnaldo Carvalho de Melo)

        Allow mixing with tracepoints and suppressing plain syscalls. (Arnaldo Carvalho de Melo)

  There's also been a ton of infrastructure work done, such as the
  split-out of perf's build system into tools/build/ and other changes -
  see the shortlog and changelog for details"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (358 commits)
  perf/x86/intel/pt: Clean up the control flow in pt_pmu_hw_init()
  perf evlist: Fix type for references to data_head/tail
  perf probe: Check the orphaned -x option
  perf probe: Support multiple probes on different binaries
  perf buildid-list: Fix segfault when show DSOs with hits
  perf tools: Fix cross-endian analysis
  perf tools: Fix error path to do closedir() when synthesizing threads
  perf tools: Fix synthesizing fork_event.ppid for non-main thread
  perf tools: Add 'I' event modifier for exclude_idle bit
  perf report: Don't call map__kmap if map is NULL.
  perf tests: Fix attr tests
  perf probe: Fix ARM 32 building error
  perf tools: Merge all perf_event_attr print functions
  perf record: Add clockid parameter
  perf sched replay: Use replay_repeat to calculate the runavg of cpu usage instead of the default value 10
  perf sched replay: Support using -f to override perf.data file ownership
  perf sched replay: Fix the EMFILE error caused by the limitation of the maximum open files
  perf sched replay: Handle the dead halt of sem_wait when create_tasks() fails for any task
  perf sched replay: Fix the segmentation fault problem caused by pr_err in threads
  perf sched replay: Realloc the memory of pid_to_task stepwise to adapt to the different pid_max configurations
  ...
2015-04-14 14:37:47 -07:00
Linus Torvalds 078838d565 Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU changes from Ingo Molnar:
 "The main changes in this cycle were:

   - changes permitting use of call_rcu() and friends very early in
     boot, for example, before rcu_init() is invoked.

   - add in-kernel API to enable and disable expediting of normal RCU
     grace periods.

   - improve RCU's handling of (hotplug-) outgoing CPUs.

   - NO_HZ_FULL_SYSIDLE fixes.

   - tiny-RCU updates to make it more tiny.

   - documentation updates.

   - miscellaneous fixes"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (58 commits)
  cpu: Provide smpboot_thread_init() on !CONFIG_SMP kernels as well
  cpu: Defer smpboot kthread unparking until CPU known to scheduler
  rcu: Associate quiescent-state reports with grace period
  rcu: Yet another fix for preemption and CPU hotplug
  rcu: Add diagnostics to grace-period cleanup
  rcutorture: Default to grace-period-initialization delays
  rcu: Handle outgoing CPUs on exit from idle loop
  cpu: Make CPU-offline idle-loop transition point more precise
  rcu: Eliminate ->onoff_mutex from rcu_node structure
  rcu: Process offlining and onlining only at grace-period start
  rcu: Move rcu_report_unblock_qs_rnp() to common code
  rcu: Rework preemptible expedited bitmask handling
  rcu: Remove event tracing from rcu_cpu_notify(), used by offline CPUs
  rcutorture: Enable slow grace-period initializations
  rcu: Provide diagnostic option to slow down grace-period initialization
  rcu: Detect stalls caused by failure to propagate up rcu_node tree
  rcu: Eliminate empty HOTPLUG_CPU ifdef
  rcu: Simplify sync_rcu_preempt_exp_init()
  rcu: Put all orphan-callback-related code under same comment
  rcu: Consolidate offline-CPU callback initialization
  ...
2015-04-14 13:36:04 -07:00
Linus Torvalds eeee78cf77 Some clean ups and small fixes, but the biggest change is the addition
of the TRACE_DEFINE_ENUM() macro that can be used by tracepoints.
 
 Tracepoints have helper functions for the TP_printk() called
 __print_symbolic() and __print_flags() that lets a numeric number be
 displayed as a a human comprehensible text. What is placed in the
 TP_printk() is also shown in the tracepoint format file such that
 user space tools like perf and trace-cmd can parse the binary data
 and express the values too. Unfortunately, the way the TRACE_EVENT()
 macro works, anything placed in the TP_printk() will be shown pretty
 much exactly as is. The problem arises when enums are used. That's
 because unlike macros, enums will not be changed into their values
 by the C pre-processor. Thus, the enum string is exported to the
 format file, and this makes it useless for user space tools.
 
 The TRACE_DEFINE_ENUM() solves this by converting the enum strings
 in the TP_printk() format into their number, and that is what is
 shown to user space. For example, the tracepoint tlb_flush currently
 has this in its format file:
 
      __print_symbolic(REC->reason,
         { TLB_FLUSH_ON_TASK_SWITCH, "flush on task switch" },
         { TLB_REMOTE_SHOOTDOWN, "remote shootdown" },
         { TLB_LOCAL_SHOOTDOWN, "local shootdown" },
         { TLB_LOCAL_MM_SHOOTDOWN, "local mm shootdown" })
 
 After adding:
 
      TRACE_DEFINE_ENUM(TLB_FLUSH_ON_TASK_SWITCH);
      TRACE_DEFINE_ENUM(TLB_REMOTE_SHOOTDOWN);
      TRACE_DEFINE_ENUM(TLB_LOCAL_SHOOTDOWN);
      TRACE_DEFINE_ENUM(TLB_LOCAL_MM_SHOOTDOWN);
 
 Its format file will contain this:
 
      __print_symbolic(REC->reason,
         { 0, "flush on task switch" },
         { 1, "remote shootdown" },
         { 2, "local shootdown" },
         { 3, "local mm shootdown" })
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Merge tag 'trace-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "Some clean ups and small fixes, but the biggest change is the addition
  of the TRACE_DEFINE_ENUM() macro that can be used by tracepoints.

  Tracepoints have helper functions for the TP_printk() called
  __print_symbolic() and __print_flags() that lets a numeric number be
  displayed as a a human comprehensible text.  What is placed in the
  TP_printk() is also shown in the tracepoint format file such that user
  space tools like perf and trace-cmd can parse the binary data and
  express the values too.  Unfortunately, the way the TRACE_EVENT()
  macro works, anything placed in the TP_printk() will be shown pretty
  much exactly as is.  The problem arises when enums are used.  That's
  because unlike macros, enums will not be changed into their values by
  the C pre-processor.  Thus, the enum string is exported to the format
  file, and this makes it useless for user space tools.

  The TRACE_DEFINE_ENUM() solves this by converting the enum strings in
  the TP_printk() format into their number, and that is what is shown to
  user space.  For example, the tracepoint tlb_flush currently has this
  in its format file:

     __print_symbolic(REC->reason,
        { TLB_FLUSH_ON_TASK_SWITCH, "flush on task switch" },
        { TLB_REMOTE_SHOOTDOWN, "remote shootdown" },
        { TLB_LOCAL_SHOOTDOWN, "local shootdown" },
        { TLB_LOCAL_MM_SHOOTDOWN, "local mm shootdown" })

  After adding:

     TRACE_DEFINE_ENUM(TLB_FLUSH_ON_TASK_SWITCH);
     TRACE_DEFINE_ENUM(TLB_REMOTE_SHOOTDOWN);
     TRACE_DEFINE_ENUM(TLB_LOCAL_SHOOTDOWN);
     TRACE_DEFINE_ENUM(TLB_LOCAL_MM_SHOOTDOWN);

  Its format file will contain this:

     __print_symbolic(REC->reason,
        { 0, "flush on task switch" },
        { 1, "remote shootdown" },
        { 2, "local shootdown" },
        { 3, "local mm shootdown" })"

* tag 'trace-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (27 commits)
  tracing: Add enum_map file to show enums that have been mapped
  writeback: Export enums used by tracepoint to user space
  v4l: Export enums used by tracepoints to user space
  SUNRPC: Export enums in tracepoints to user space
  mm: tracing: Export enums in tracepoints to user space
  irq/tracing: Export enums in tracepoints to user space
  f2fs: Export the enums in the tracepoints to userspace
  net/9p/tracing: Export enums in tracepoints to userspace
  x86/tlb/trace: Export enums in used by tlb_flush tracepoint
  tracing/samples: Update the trace-event-sample.h with TRACE_DEFINE_ENUM()
  tracing: Allow for modules to convert their enums to values
  tracing: Add TRACE_DEFINE_ENUM() macro to map enums to their values
  tracing: Update trace-event-sample with TRACE_SYSTEM_VAR documentation
  tracing: Give system name a pointer
  brcmsmac: Move each system tracepoints to their own header
  iwlwifi: Move each system tracepoints to their own header
  mac80211: Move message tracepoints to their own header
  tracing: Add TRACE_SYSTEM_VAR to xhci-hcd
  tracing: Add TRACE_SYSTEM_VAR to kvm-s390
  tracing: Add TRACE_SYSTEM_VAR to intel-sst
  ...
2015-04-14 10:49:03 -07:00
Linus Torvalds d0bbe0dd35 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree from Jiri Kosina:
 "Usual trivial tree updates.  Nothing outstanding -- mostly printk()
  and comment fixes and unused identifier removals"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
  goldfish: goldfish_tty_probe() is not using 'i' any more
  powerpc: Fix comment in smu.h
  qla2xxx: Fix printks in ql_log message
  lib: correct link to the original source for div64_u64
  si2168, tda10071, m88ds3103: Fix firmware wording
  usb: storage: Fix printk in isd200_log_config()
  qla2xxx: Fix printk in qla25xx_setup_mode
  init/main: fix reset_device comment
  ipwireless: missing assignment
  goldfish: remove unreachable line of code
  coredump: Fix do_coredump() comment
  stacktrace.h: remove duplicate declaration task_struct
  smpboot.h: Remove unused function prototype
  treewide: Fix typo in printk messages
  treewide: Fix typo in printk messages
  mod_devicetable: fix comment for match_flags
2015-04-14 09:50:27 -07:00
Bob Moore 81ed793d30 ACPICA: Fix a sscanf format string.
ACPICA commit 84f3569db7accc576ace2dae81d101467254fe9d

Was using %d instead of properly using %u.

This patch only affects acpidump tool.

Link: https://github.com/acpica/acpica/commit/84f3569d
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-04-14 14:51:53 +02:00
Lv Zheng e0423edff1 ACPICA: Unix: Cleanup to use ACPI_TO_INTEGER() to calc page offset.
ACPICA commit 9e2d8180f4d5e61949b17513bae8aff6412f62dd

The offset calculation needn't convert a pointer to a special integer type.
So this patch uses ACPI_TO_INTEGER() instead.

This patch only affects acpidump tool.

Link: https://github.com/acpica/acpica/commit/9e2d8180
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-04-14 14:51:50 +02:00
Linus Torvalds b79013b244 Staging driver patches for 4.1-rc1
Here's the big staging driver patchset for 4.1-rc1.
 
 There's a lot of patches here, the Outreachy application period happened
 during this development cycle, so that means that there was a lot of
 cleanup patches accepted.  Other than the normal coding style and sparse
 fixes here, there are some driver updates and work toward making some of
 the drivers into "mergable" shape (like the Unisys drivers.)
 
 All of these have been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging driver updates from Greg KH:
 "Here's the big staging driver patchset for 4.1-rc1.

  There's a lot of patches here, the Outreachy application period
  happened during this development cycle, so that means that there was a
  lot of cleanup patches accepted.  Other than the normal coding style
  and sparse fixes here, there are some driver updates and work toward
  making some of the drivers into "mergable" shape (like the Unisys
  drivers.)

  All of these have been in linux-next for a while"

* tag 'staging-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1214 commits)
  staging: lustre: orthography & coding style
  staging: lustre: lnet: lnet: fix error return code
  staging: lustre: fix sparse warning
  Revert "Staging: sm750fb: Fix C99 Comments"
  Staging: rtl8192u: use correct array for debug output
  staging: rtl8192e: Remove dead code
  staging: rtl8192e: Comment cleanup (style/format)
  staging: rtl8192e: Fix indentation in rtllib_rx_auth_resp()
  staging: rtl8192e: Decrease nesting of rtllib_rx_auth_resp()
  staging: rtl8192e: Divide rtllib_rx_auth()
  staging: rtl8192e: Fix PRINTK_WITHOUT_KERN_LEVEL warnings
  staging: rtl8192e: Fix DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON warning
  staging: rtl8192e: Fix BRACES warning
  staging: rtl8192e: Fix LINE_CONTINUATIONS warning
  staging: rtl8192e: Fix UNNECESSARY_PARENTHESES warnings
  staging: rtl8192e: remove unused EXPORT_SYMBOL_RSL macro
  staging: rtl8192e: Fix RETURN_VOID warnings
  staging: rtl8192e: Fix UNNECESSARY_ELSE warning
  staging: rtl8723au: Remove unneeded comments
  staging: rtl8723au: Use __func__ in trace logs
  ...
2015-04-13 17:37:33 -07:00
He Kuang f19e80c640 perf probe: Fix segfault when probe with lazy_line to file
The first argument passed to find_probe_point_lazy() should be CU die,
which will be passed to die_walk_lines() when lazy_line matches.
Currently, when we probe with lazy_line pattern to file without function
name, NULL pointer is passed and causes a segment fault.

Can be reproduced as following:

  $ perf probe -k vmlinux --add='fs/super.c;s->s_count=1;'
  [ 1958.984658] perf[1020]: segfault at 10 ip 00007fc6e10d8c71 sp
  00007ffcbfaaf900 error 4 in libdw-0.161.so[7fc6e10ce000+34000]
  Segmentation fault

After this patch:

  $ perf probe -k vmlinux --add='fs/super.c;s->s_count=1;'
  Added new event:
  probe:_stext         (on @fs/super.c)

  You can now use it in all perf tools, such as:
    perf record -e probe:_stext -aR sleep 1

Signed-off-by: He Kuang <hekuang@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1428925290-5623-3-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-13 20:12:21 -03:00
Naohiro Aota 09ed8975c4 perf probe: Find compilation directory path for lazy matching
If we use lazy matching, it failed to open a souce file if perf command
is invoked outside of compilation directory:

$ perf probe -a '__schedule;clear_*'
Failed to open kernel/sched/core.c: No such file or directory
  Error: Failed to add events. (-2)

OTOH, other commands like "probe -L" can solve the souce directory by
themselves. Let's make it possible for lazy matching too!

Signed-off-by: Naohiro Aota <naota@elisp.net>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1426223923-1493-1-git-send-email-naota@elisp.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-13 20:11:05 -03:00
He Kuang 9d7b45c572 perf probe: Set retprobe flag when probe in address-based alternative mode
When perf probe searched in a debuginfo file and failed, it tried with
an alternative, in function get_alternative_probe_event():

        memcpy(tmp, &pev->point, sizeof(*tmp));
        memset(&pev->point, 0, sizeof(pev->point));

In this case, it drops the retprobe flag and forgets to set it back in
find_alternative_probe_point(), so the problem occurs.

Can be reproduced as following:

  $ perf probe -v -k vmlinux --add='sys_write%return'
  ...
  Added new event:
  Writing event: p:probe/sys_write _stext+1584952
    probe:sys_write      (on sys_write%return)

  $ cat /sys/kernel/debug/tracing/kprobe_events
  p:probe/sys_write _stext+1584952

After this patch:

  $ perf probe -v -k vmlinux --add='sys_write%return'
  Added new event:
  Writing event: r:probe/sys_write SyS_write+0
    probe:sys_write      (on sys_write%return)

  $ cat /sys/kernel/debug/tracing/kprobe_events
  r:probe/sys_write SyS_write

Signed-off-by: He Kuang <hekuang@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1428925290-5623-1-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-13 17:25:22 -03:00
Linus Torvalds 60f898eeaa Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 asm changes from Ingo Molnar:
 "There were lots of changes in this development cycle:

   - over 100 separate cleanups, restructuring changes, speedups and
     fixes in the x86 system call, irq, trap and other entry code, part
     of a heroic effort to deobfuscate a decade old spaghetti asm code
     and its C code dependencies (Denys Vlasenko, Andy Lutomirski)

   - alternatives code fixes and enhancements (Borislav Petkov)

   - simplifications and cleanups to the compat code (Brian Gerst)

   - signal handling fixes and new x86 testcases (Andy Lutomirski)

   - various other fixes and cleanups

  By their nature many of these changes are risky - we tried to test
  them well on many different x86 systems (there are no known
  regressions), and they are split up finely to help bisection - but
  there's still a fair bit of residual risk left so caveat emptor"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (148 commits)
  perf/x86/64: Report regs_user->ax too in get_regs_user()
  perf/x86/64: Simplify regs_user->abi setting code in get_regs_user()
  perf/x86/64: Do report user_regs->cx while we are in syscall, in get_regs_user()
  perf/x86/64: Do not guess user_regs->cs, ss, sp in get_regs_user()
  x86/asm/entry/32: Tidy up JNZ instructions after TESTs
  x86/asm/entry/64: Reduce padding in execve stubs
  x86/asm/entry/64: Remove GET_THREAD_INFO() in ret_from_fork
  x86/asm/entry/64: Simplify jumps in ret_from_fork
  x86/asm/entry/64: Remove a redundant jump
  x86/asm/entry/64: Optimize [v]fork/clone stubs
  x86/asm/entry: Zero EXTRA_REGS for stub32_execve() too
  x86/asm/entry/64: Move stub_x32_execvecloser() to stub_execveat()
  x86/asm/entry/64: Use common code for rt_sigreturn() epilogue
  x86/asm/entry/64: Add forgotten CFI annotation
  x86/asm/entry/irq: Simplify interrupt dispatch table (IDT) layout
  x86/asm/entry/64: Move opportunistic sysret code to syscall code path
  x86, selftests: Add sigreturn selftest
  x86/alternatives: Guard NOPs optimization
  x86/asm/entry: Clear EXTRA_REGS for all executable formats
  x86/signal: Remove pax argument from restore_sigcontext
  ...
2015-04-13 13:16:36 -07:00
Len Brown 8f61f3598d tools/power turbostat: label base frequency
syntax only.

The cool kids are now using the phrase "base frequency",
where in the past we used "max non-turbo frequency" or "TSC frequency".

This distinction becomes important when a processor has a TSC
that runs at a different speed than the "base frequency".

Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-13 15:52:54 -04:00
Len Brown e33cbe852d tools/power turbostat: update PERF_LIMIT_REASONS decoding
cosmetic only.

order the decoding of MSR_PERF_LIMIT_REASONS bits
from MSB to LSB -- which you notice when more than 1 bit is set
and you are, say, comparing the output to the documentation...

Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-13 15:52:54 -04:00
Len Brown 1cc21f7b6b tools/power turbostat: simplify default output
Casual turbostat users generally just want to know MHz.
So by default, just print enough information to make sense of MHz.

All the other configuration data and columns for C-states and temperature etc,
are printed with the --debug option.

Signed-off-by: Len Brown <len.brown@intel.com>
2015-04-13 15:52:54 -04:00