Commit Graph

244386 Commits

Author SHA1 Message Date
Steven Whitehouse 8f065d3650 GFS2: Improve bug trap code in ->releasepage()
If the buffer is dirty or pinned, then as well as printing a
warning, we should also refuse to release the page in
question.

Currently this can occur if there is a race between mmap()ed
writers and O_DIRECT on the same file. With the addition of
->launder_page() in the future, we should be able to close
this gap.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-05-03 11:49:19 +01:00
Steven Whitehouse 4f1de01821 GFS2: Fix ail list traversal
In the recent patches to update the AIL list code, I managed to
forget that the ail list lock got dropped, even though I
added a comment specifically to remind myself :(

Reported-by: Barry Marson <bmarson@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-05-03 11:48:07 +01:00
Benjamin Marzinski 6905d9e4dd GFS2: make sure fallocate bytes is a multiple of blksize
The GFS2 fallocate code chooses a target size to for allocating chunks of
space.  Whenever it can't find any resource groups with enough space free, it
halves its target. Since this target is in bytes, eventually it will no longer
be a multiple of blksize.  As long as there is more space available in the
resource group than the target, this isn't a problem, since gfs2 will use the
actual space available, which is always a multiple of blksize.  However,
when gfs couldn't fallocate a bigger chunk than the target, it was using the
non-blksize aligned number. This caused a BUG in later code that required
blksize aligned offsets.  GFS2 now ensures that bytes is always a multiple of
blksize

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-05-03 11:47:42 +01:00
Steven Whitehouse c83ae9cad8 GFS2: Add an AIL writeback tracepoint
Add a tracepoint for monitoring writeback of the AIL.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 09:01:58 +01:00
Steven Whitehouse 4667a0ec32 GFS2: Make writeback more responsive to system conditions
This patch adds writeback_control to writing back the AIL
list. This means that we can then take advantage of the
information we get in ->write_inode() in order to set off
some pre-emptive writeback.

In addition, the AIL code is cleaned up a bit to make it
a bit simpler to understand.

There is still more which can usefully be done in this area,
but this is a good start at least.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 09:01:37 +01:00
Steven Whitehouse f42ab08529 GFS2: Optimise glock lru and end of life inodes
The GLF_LRU flag introduced in the previous patch can be
used to check if a glock is on the lru list when a new
holder is queued and if so remove it, without having first
to get the lru_lock.

The main purpose of this patch however is to optimise the
glocks left over when an inode at end of life is being
evicted. Previously such glocks were left with the GLF_LFLUSH
flag set, so that when reclaimed, each one required a log flush.
This patch resets the GLF_LFLUSH flag when there is nothing
left to flush thus preventing later log flushes as glocks are
reused or demoted.

In order to do this, we need to keep track of the number of
revokes which are outstanding, and also to clear the GLF_LFLUSH
bit after a log commit when only revokes have been processed.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 09:01:17 +01:00
Steven Whitehouse 627c10b7e4 GFS2: Improve tracing support (adds two flags)
This adds support for two new flags. One keeps track of whether
the glock is on the LRU list or not. The other isn't really a
flag as such, but an indication of whether the glock has an
attached object or not. This indication is reported without
any locking, which is ok since we do not dereference the object
pointer but merely report whether it is NULL or not.

Also, this fixes one place where a tracepoint was missing, which
was at the point we remove deallocated blocks from the journal.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 09:00:59 +01:00
Steven Whitehouse dba898b02d GFS2: Clean up fsync()
This patch is designed to clean up GFS2's fsync
implementation and ensure that it really does get everything on
disk. Since ->write_inode() has been updated, we can call that
via the vfs library function sync_inode_metadata() and the only
remaining thing that has to be done is to ensure that we get
any revoke records in the log after the inode has been written back.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 09:00:41 +01:00
Steven Whitehouse efc1a9c2a7 GFS2: Remove unused macro
The buffer_in_io() macro has been unused for some time,
so remove it.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 09:00:24 +01:00
Steven Whitehouse 29687a2ac8 GFS2: Alter point of entry to glock lru list for glocks with an address_space
Rather than allowing the glocks to be scheduled for possible
reclaim as soon as they have exited the journal, this patch
delays their entry to the list until the glocks in question
are no longer in use.

This means that we will rely on the vm for writeback of all
dirty data and metadata from now on. When glocks are added
to the lru list they should be freeable much faster since all
the I/O required to free them should have already been completed.

This should lead to much better I/O patterns under low memory
conditions.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 08:59:48 +01:00
Steven Whitehouse 5ac048bb7e GFS2: Use filemap_fdatawrite() to write back the AIL
In order to ensure that the mapping stats (and thus the bdi) are correctly
updated, this patch changes the AIL writeback to use the filemap_datawrite
function. This helps prevent stalls in balance_dirty_pages() due to
large amounts of dirty metadata when there is little or no dirty data
around.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 08:59:25 +01:00
Steven Whitehouse 1027efaa23 GFS2: Make ->write_inode() really write
The GFS2 ->write_inode function should be more aggressive at writing
back to the filesystem. This adopts the XFS system of returning
-EAGAIN when the writeback has not been completely done. Also, we
now kick off in-place writeback when called with WB_SYNC_NONE,
but we only wait for it and flush the log when WB_SYNC_ALL is
requested.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 08:55:07 +01:00
Bob Peterson 556bb17998 GFS2: move function foreach_leaf to gfs2_dir_exhash_dealloc
The previous patches made function gfs2_dir_exhash_dealloc do nothing
but call function foreach_leaf.  This patch simplifies the code by
moving the entire function foreach_leaf into gfs2_dir_exhash_dealloc.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 08:54:44 +01:00
Bob Peterson ec038c826b GFS2: pass leaf_bh into leaf_dealloc
Function foreach_leaf used to look up the leaf block address and get
a buffer_head.  Then it would call leaf_dealloc which did the same
lookup.  This patch combines the two operations by making foreach_leaf
pass the leaf bh to leaf_dealloc.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 08:54:26 +01:00
Bob Peterson d24a7a439a GFS2: Combine transaction from gfs2_dir_exhash_dealloc
At the end of function gfs2_dir_exhash_dealloc, it was setting the dinode
type to "file" to prevent directory corruption in case of a crash.
It was doing so in its own journal transaction.  This patch makes the
change occur when the last call is make to leaf_dealloc, since it needs
to rewrite the directory dinode at that time anyway.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 08:53:56 +01:00
Bob Peterson 0d95326d9b GFS2: remove *leaf_call_t and simplify leaf_dealloc
Since foreach_leaf is only called with leaf_dealloc as its only possible
call function, we can simplify the code by making it call leaf_dealloc
directly.  This simplifies the code and eliminates the need for
leaf_call_t, the generic call method.  This is a first small step in
simplifying the directory leaf deallocation code.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 08:53:35 +01:00
Bob Peterson 95c8e17f2f GFS2: Dump better debug info if a bitmap inconsistency is detected
On rare occasions we encounter gfs2 problems where an
invalid bitmap state transition is attempted.  For example,
trying to "unlink" a free block.  In these cases, there
is really no useful information logged to debug the problem.
This patch adds more debug details that should allow us to
more closely examine the problem and possibly solve it.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-04-20 08:53:12 +01:00
Linus Torvalds 2f666bcf75 Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm/radeon/kms: pll tweaks for r7xx
  drm/nouveau: fix allocation of notifier object
  drm/nouveau: fix notifier memory corruption bug
  drm/nouveau: fix pinning of notifier block
  drm/nouveau: populate ttm_alloced with false, when it's not
  drm/nouveau: fix nv30 pcie boards
  drm/nouveau: split ramin_lock into two locks, one hardirq safe
  drm/radeon/kms: adjust evergreen display watermark setup
  drm/radeon/kms: add connectors even if i2c fails
  drm/radeon/kms: fix bad shift in atom iio table parser
2011-04-19 18:32:57 -07:00
Alex Deucher 5785e53ffa drm/radeon/kms: pll tweaks for r7xx
Prefer min m to max p only on pre-r7xx asics.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=36197

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-04-20 09:39:37 +10:00
Dave Airlie be761d5ebd Merge remote branch 'nouveau/drm-nouveau-fixes' of /ssd/git/drm-nouveau-next into drm-fixes
* 'nouveau/drm-nouveau-fixes' of /ssd/git/drm-nouveau-next:
  drm/nouveau: fix allocation of notifier object
  drm/nouveau: fix notifier memory corruption bug
  drm/nouveau: fix pinning of notifier block
  drm/nouveau: populate ttm_alloced with false, when it's not
  drm/nouveau: fix nv30 pcie boards
  drm/nouveau: split ramin_lock into two locks, one hardirq safe
2011-04-20 09:21:34 +10:00
Marcin Slusarz e4ac93bf3c drm/nouveau: fix allocation of notifier object
Commit 73412c3854 ("drm/nouveau: allocate
kernel's notifier object at end of block") intended to align end of
notifier block to page boundary, but start of block was miscalculated
to be off by -16 bytes. Fix it.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2011-04-20 08:51:34 +10:00
Marcin Slusarz a18d89ca02 drm/nouveau: fix notifier memory corruption bug
nouveau_bo_wr32 expects offset to be in words, but we pass value in bytes,
so after commit 73412c3854 ("drm/nouveau: allocate
kernel's notifier object at end of block") we started to overwrite some memory
after notifier buffer object (previously m2mf_ntfy was always 0, so it didn't
matter it was a value in bytes).

Reported-by: Dominik Brodowski <linux@dominikbrodowski.net>
Reported-by: Nigel Cunningham <lkml@nigelcunningham.com.au>
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Pekka Paalanen <pq@iki.fi>
Cc: stable@kernel.org    [2.6.38]
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2011-04-20 08:51:31 +10:00
Ben Skeggs 11dea1a214 drm/nouveau: fix pinning of notifier block
Problem introduced with commit 6ba9a68317

Reported-by: Bob Gleitsmann <rjgleits@bellsouth.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2011-04-20 08:51:23 +10:00
Ben Skeggs 8706398bf8 drm/nouveau: populate ttm_alloced with false, when it's not
Caught with kmemcheck on unrelated business.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2011-04-20 08:50:40 +10:00
Ben Skeggs 01d153326e drm/nouveau: fix nv30 pcie boards
Wasn't aware they even existed, apparently they do!  They're actually
AGP chips with a bridge as far as I can tell, which puts them in the
same boat as nv40/nv45.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2011-04-20 08:50:37 +10:00
Ben Skeggs 04eb34a43c drm/nouveau: split ramin_lock into two locks, one hardirq safe
Fixes a possible lock ordering reversal between context_switch_lock
and ramin_lock.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
2011-04-20 08:50:14 +10:00
Linus Torvalds 6cf544377f Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (51 commits)
  netfilter: ipset: Fix the order of listing of sets
  ip6_pol_route panic: Do not allow VLAN on loopback
  bnx2x: Fix port identification problem
  r8169: add Realtek as maintainer.
  ip: ip_options_compile() resilient to NULL skb route
  bna: fix memory leak during RX path cleanup
  bna: fix for clean fw re-initialization
  usbnet: Fix up 'FLAG_POINTTOPOINT' and 'FLAG_MULTI_PACKET' overlaps.
  iwlegacy: fix tx_power initialization
  Revert "tcp: disallow bind() to reuse addr/port"
  qlcnic: limit skb frags for non tso packet
  net: can: mscan: fix build breakage in mpc5xxx_can
  netfilter: ipset: set match and SET target fixes
  netfilter: ipset: bitmap:ip,mac type requires "src" for MAC
  sctp: fix oops while removed transport still using as retran path
  sctp: fix oops when updating retransmit path with DEBUG on
  net: Disable NETIF_F_TSO_ECN when TSO is disabled
  net: Disable all TSO features when SG is disabled
  sfc: Use rmb() to ensure reads occur in order
  ieee802154: Remove hacked CFLAGS in net/ieee802154/Makefile
  ...
2011-04-19 15:16:41 -07:00
Linus Torvalds 97ddec65ff Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI: pci-label: Fix build failure when CONFIG_NLS is set to 'm' by allmodconfig
2011-04-19 12:46:32 -07:00
David S. Miller 0b0dc0f17f Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6 2011-04-19 11:28:35 -07:00
Linus Torvalds 9d914b3ef3 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, gart: Make sure GART does not map physmem above 1TB
  x86, gart: Set DISTLBWALKPRB bit always
  x86, gart: Convert spaces to tabs in enable_gart_translation
2011-04-19 10:58:13 -07:00
Linus Torvalds 4ae0ff16ef Merge branch 'timer-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timer-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  RTC: rtc-omap: Fix a leak of the IRQ during init failure
  posix clocks: Replace mutex with reader/writer semaphore
2011-04-19 10:56:46 -07:00
Linus Torvalds 96ad999918 Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf, x86: Fix AMD family 15h FPU event constraints
  perf, x86: Fix pre-defined cache-misses event for AMD family 15h cpus
  perf evsel: Fix use of inherit
  perf hists browser: Fix seg fault when annotate null symbol
2011-04-19 10:56:02 -07:00
Linus Torvalds 71460af58f Revert "[media] V4L: videobuf, don't use dma addr as physical"
This reverts commit 35d9f510b6.

Quoth Jiri Slaby:
 "It fixes mmap when IOMMU is used on x86 only, but breaks architectures
  like ARM or PPC where virt_to_phys(dma_alloc_coherent) doesn't work.
  We need there dma_mmap_coherent or similar (the trickery what
  snd_pcm_default_mmap does but in some saner way).  But this cannot be
  done at this phase."

Requested-by: Jiri Slaby <jslaby@suse.cz>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-04-19 10:54:44 -07:00
Linus Torvalds f28c6179e5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes:
  GFS2: filesystem hang caused by incorrect lock order
  GFS2: Don't try to deallocate unlinked inodes when mounted ro
  GFS2: directly write blocks past i_size
  GFS2: write_end error path fails to unlock transaction lock
2011-04-19 10:52:51 -07:00
Jozsef Kadlecsik a8a8a0937e netfilter: ipset: Fix the order of listing of sets
A restoreable saving of sets requires that list:set type of sets
come last and the code part which should have taken into account
the ordering was broken. The patch fixes the listing order.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-04-19 15:59:15 +02:00
Robert Richter 855357a217 perf, x86: Fix AMD family 15h FPU event constraints
Depending on the unit mask settings some FPU events may be scheduled
only on cpu counter #3. This patch fixes this.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@googlemail.com>
Link: http://lkml.kernel.org/r/1302913676-14352-3-git-send-email-robert.richter@amd.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-04-19 10:07:55 +02:00
Andre Przywara 83112e688f perf, x86: Fix pre-defined cache-misses event for AMD family 15h cpus
With AMD cpu family 15h a unit mask was introduced for the Data Cache
Miss event (0x041/L1-dcache-load-misses). We need to enable bit 0
(first data cache miss or streaming store to a 64 B cache line) of
this mask to proper count data cache misses.

Now we set this bit for all families and models. In case a PMU does
not implement a unit mask for event 0x041 the bit is ignored.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1302913676-14352-2-git-send-email-robert.richter@amd.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-04-19 10:07:54 +02:00
Linus Torvalds f0e615c3cb Linux 2.6.39-rc4 2011-04-18 21:26:00 -07:00
Linus Torvalds e024f69de9 Merge branch 'for-39-rc4' of git://codeaurora.org/quic/kernel/davidb/linux-msm
* 'for-39-rc4' of git://codeaurora.org/quic/kernel/davidb/linux-msm:
  msm: timer: fix missing return value
  msm: Remove extraneous ffa device check
2011-04-18 15:44:29 -07:00
Linus Torvalds 96fd2d57b8 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: xen-kbdfront - fix mouse getting stuck after save/restore
  Input: estimate number of events per packet
  Input: evdev - indicate buffer overrun with SYN_DROPPED
  Input: document event types and codes and their intended use
  Input: add KEY_IMAGES specifically for AL Image Browser
  Input: twl4030_keypad - fix potential NULL dereference in twl4030_kp_probe()
  Input: h3600_ts - fix error handling at connect
  Input: twl4030_keypad - avoid potential NULL-pointer dereference
2011-04-18 13:29:03 -07:00
Linus Torvalds 8a83f33100 Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  block: add blk_run_queue_async
  block: blk_delay_queue() should use kblockd workqueue
  md: fix up raid1/raid10 unplugging.
  md: incorporate new plugging into raid5.
  md: provide generic support for handling unplug callbacks.
  md - remove old plugging code.
  md/dm - remove remains of plug_fn callback.
  md: use new plugging interface for RAID IO.
  block: drop queue lock before calling __blk_run_queue() for kblockd punt
  Revert "block: add callback function for unplug notification"
  block: Enhance new plugging support to support general callbacks
2011-04-18 13:21:18 -07:00
Linus Torvalds 5d5b1b9f79 Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/powermac: Build fix with SMP and CPU hotplug
  powerpc/perf_event: Skip updating kernel counters if register value shrinks
  powerpc: Don't write protect kernel text with CONFIG_DYNAMIC_FTRACE enabled
  powerpc: Fix oops if scan_dispatch_log is called too early
  powerpc/pseries: Use a kmem cache for DTL buffers
  powerpc/kexec: Fix regression causing compile failure on UP
  powerpc/85xx: disable Suspend support if SMP enabled
  powerpc/e500mc: Remove CPU_FTR_MAYBE_CAN_NAP/CPU_FTR_MAYBE_CAN_DOZE
  powerpc/book3e: Fix CPU feature handling on 64-bit e5500
  powerpc: Check device status before adding serial device
  powerpc/85xx: Don't add disabled PCIe devices
2011-04-18 12:24:24 -07:00
Linus Torvalds adff377bb1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (24 commits)
  Btrfs: fix free space cache leak
  Btrfs: avoid taking the chunk_mutex in do_chunk_alloc
  Btrfs end_bio_extent_readpage should look for locked bits
  Btrfs: don't force chunk allocation in find_free_extent
  Btrfs: Check validity before setting an acl
  Btrfs: Fix incorrect inode nlink in btrfs_link()
  Btrfs: Check if btrfs_next_leaf() returns error in btrfs_real_readdir()
  Btrfs: Check if btrfs_next_leaf() returns error in btrfs_listxattr()
  Btrfs: make uncache_state unconditional
  btrfs: using cached extent_state in set/unlock combinations
  Btrfs: avoid taking the trans_mutex in btrfs_end_transaction
  Btrfs: fix subvolume mount by name problem when default mount subvolume is set
  fix user annotation in ioctl.c
  Btrfs: check for duplicate iov_base's when doing dio reads
  btrfs: properly handle overlapping areas in memmove_extent_buffer
  Btrfs: fix memory leaks in btrfs_new_inode()
  Btrfs: check for duplicate iov_base's when doing dio reads
  Btrfs: reuse the extent_map we found when calling btrfs_get_extent
  Btrfs: do not use async submit for small DIO io's
  Btrfs: don't split dio bios if we don't have to
  ...
2011-04-18 12:24:05 -07:00
Linus Torvalds d8bdc59f21 proc: do proper range check on readdir offset
Rather than pass in some random truncated offset to the pid-related
functions, check that the offset is in range up-front.

This is just cleanup, the previous commit fixed the real problem.

Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-04-18 10:36:54 -07:00
Linus Torvalds c78193e9c7 next_pidmap: fix overflow condition
next_pidmap() just quietly accepted whatever 'last' pid that was passed
in, which is not all that safe when one of the users is /proc.

Admittedly the proc code should do some sanity checking on the range
(and that will be the next commit), but that doesn't mean that the
helper functions should just do that pidmap pointer arithmetic without
checking the range of its arguments.

So clamp 'last' to PID_MAX_LIMIT.  The fact that we then do "last+1"
doesn't really matter, the for-loop does check against the end of the
pidmap array properly (it's only the actual pointer arithmetic overflow
case we need to worry about, and going one bit beyond isn't going to
overflow).

[ Use PID_MAX_LIMIT rather than pid_max as per Eric Biederman ]

Reported-by: Tavis Ormandy <taviso@cmpxchg8b.com>
Analyzed-by: Robert Święcki <robert@swiecki.net>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-04-18 10:35:30 -07:00
Igor Mammedov c36b58e8a9 Input: xen-kbdfront - fix mouse getting stuck after save/restore
Mouse gets "stuck" after restore of PV guest but buttons are in working
condition.

If driver has been configured for ABS coordinates at start it will get
XENKBD_TYPE_POS events and then suddenly after restore it'll start getting
XENKBD_TYPE_MOTION events, that will be dropped later and they won't get
into user-space.

Regression was introduced by hunk 5 and 6 of
5ea5254aa0ad269cfbd2875c973ef25ab5b5e9db
("Input: xen-kbdfront - advertise either absolute or relative
coordinates").

Driver on restore should ask xen for request-abs-pointer again if it is
available. So restore parts that did it before 5ea5254.

Acked-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
[v1: Expanded the commit description]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2011-04-18 10:17:45 -07:00
Jeff Brown 80b4895aa4 Input: estimate number of events per packet
Calculate a default based on the number of ABS axes, REL axes,
and MT slots for the device during input device registration.

Signed-off-by: Jeff Brown <jeffbrown@android.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2011-04-18 10:15:43 -07:00
Joerg Roedel 665d3e2af8 x86, gart: Make sure GART does not map physmem above 1TB
The GART can only map physical memory below 1TB. Make sure
the gart driver in the kernel does not try to map memory
above 1TB.

Cc: <stable@kernel.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Link: http://lkml.kernel.org/r/1303134346-5805-5-git-send-email-joerg.roedel@amd.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2011-04-18 09:26:49 -07:00
Joerg Roedel c34151a742 x86, gart: Set DISTLBWALKPRB bit always
The DISTLBWALKPRB bit must be set for the GART because the
gatt table is mapped UC. But the current code does not set
the bit at boot when the BIOS setup the aperture correctly.
Fix that by setting this bit when enabling the GART instead
of the other places.

Cc: <stable@kernel.org>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Link: http://lkml.kernel.org/r/1303134346-5805-4-git-send-email-joerg.roedel@amd.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2011-04-18 09:26:48 -07:00
Joerg Roedel af289bfe15 x86, gart: Convert spaces to tabs in enable_gart_translation
Probably by copy&paste this function was indented by spaces.
Convert this to tabs.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Link: http://lkml.kernel.org/r/1303134346-5805-3-git-send-email-joerg.roedel@amd.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2011-04-18 09:26:48 -07:00