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  1. 16 Dec, 2011 20 commits
  3. 15 Dec, 2011 20 commits
    • Linus Torvalds's avatar
      Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft · 6f12d2ee
      Linus Torvalds authored 
      * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft:
  ibft: Fix finding IBFT ACPI table on UEFI
      6f12d2ee
    • Linus Torvalds's avatar
      Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · 88703f27
      Linus Torvalds authored 
      * 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: r8712u: Add new USB ID
  staging: tidspbridge: request dmtimer clocks on init
  staging: tidspbridge: include module.h by default
      88703f27
    • Linus Torvalds's avatar
      Merge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · f242bbc5
      Linus Torvalds authored 
      * 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: option: Removing one bogus and adding some new Huawei combinations
  USB: cdc-acm: add IDs for Motorola H24 HSPA USB module.
  usb: option: Add Huawei E398 controlling interfaces
  usb: renesas_usbhs: add hcd->has_tt for low/full speed
  usb: renesas_usbhs: typofix: irq_dtch control DTCHE
  usb: gadget: storage: release superspeed descriptors.
      f242bbc5
    • Uwe Kleine-König's avatar
      ARM: unwinder: fix bisection to find origin in .idx section · ddf5a25c
      Uwe Kleine-König authored 
      The bisection implemented in unwind_find_origin() stopped to early.  If
there is only a single entry left to check the original code just took
the end point as origin which might be wrong.

This was introduced in commit de66a979 ("ARM: 7187/1: fix unwinding
for XIP kernels").
Reported-and-tested-by: default avatarNick Bowler <nbowler@elliptictech.com>
Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ddf5a25c
    • Chris Mason's avatar
      Btrfs: unplug every once and a while · d85c8a6f
      Chris Mason authored 
      The btrfs io submission threads can build up massive plug lists.  This
keeps things more reasonable so we don't hand over huge dumps of IO at
once.
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      d85c8a6f
    • Tejun Heo's avatar
      block: don't kick empty queue in blk_drain_queue() · 4eabc941
      Tejun Heo authored 
      While probing, fd sets up queue, probes hardware and tears down the
queue if probing fails.  In the process, blk_drain_queue() kicks the
queue which failed to finish initialization and fd is unhappy about
that.

  floppy0: no floppy controllers found
  ------------[ cut here ]------------
  WARNING: at drivers/block/floppy.c:2929 do_fd_request+0xbf/0xd0()
  Hardware name: To Be Filled By O.E.M.
  VFS: do_fd_request called on non-open device
  Modules linked in:
  Pid: 1, comm: swapper Not tainted 3.2.0-rc4-00077-g5983fe2b #2
  Call Trace:
   [<ffffffff81039a6a>] warn_slowpath_common+0x7a/0xb0
   [<ffffffff81039b41>] warn_slowpath_fmt+0x41/0x50
   [<ffffffff813d657f>] do_fd_request+0xbf/0xd0
   [<ffffffff81322b95>] blk_drain_queue+0x65/0x80
   [<ffffffff81322c93>] blk_cleanup_queue+0xe3/0x1a0
   [<ffffffff818a809d>] floppy_init+0xdeb/0xe28
   [<ffffffff818a72b2>] ? daring+0x6b/0x6b
   [<ffffffff810002af>] do_one_initcall+0x3f/0x170
   [<ffffffff81884b34>] kernel_init+0x9d/0x11e
   [<ffffffff810317c2>] ? schedule_tail+0x22/0xa0
   [<ffffffff815dbb14>] kernel_thread_helper+0x4/0x10
   [<ffffffff81884a97>] ? start_kernel+0x2be/0x2be
   [<ffffffff815dbb10>] ? gs_change+0xb/0xb

Avoid it by making blk_drain_queue() kick queue iff dispatch queue has
something on it.
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Reported-by: default avatarRalf Hildebrandt <Ralf.Hildebrandt@charite.de>
Reported-by: default avatarWu Fengguang <fengguang.wu@intel.com>
Tested-by: default avatarSergei Trofimovich <slyich@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      4eabc941
    • Linus Torvalds's avatar
      Merge branch 'stable/for-linus-fixes-3.2' of... · 42ebfc61
      Linus Torvalds authored 
      Merge branch 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

* 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/swiotlb: Use page alignment for early buffer allocation.
  xen: only limit memory map to maximum reservation for domain 0.
      42ebfc61
    • Chris Mason's avatar
      Merge branch 'for-chris' of... · 567a45e9
      Chris Mason authored 
      Merge branch 'for-chris' of http://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-work into integration

Conflicts:
	fs/btrfs/inode.c
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      567a45e9
    • Chris Mason's avatar
      Btrfs: deal with NULL srv_rsv in the delalloc inode reservation code · e755d9ab
      Chris Mason authored 
      btrfs_update_inode is sometimes called with a null reservation.
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      e755d9ab
    • Ashish Jangam's avatar
      gpio: Fix DA9052 GPIO build errors. · 87b9b0e0
      Ashish Jangam authored 
      This patch is functionally tested on Samsung SMDKV6410.
Reported-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: default avatarDavid Dajun Chen <dchen@diasemi.com>
Signed-off-by: default avatarAshish Jangam <ashish.jangam@kpitcummins.com>
[grant.likely: don't create an unnecessary header file]
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      87b9b0e0
    • Konrad Rzeszutek Wilk's avatar
      xen/swiotlb: Use page alignment for early buffer allocation. · 63a74175
      Konrad Rzeszutek Wilk authored 
      This fixes an odd bug found on a Dell PowerEdge 1850/0RC130
(BIOS A05 01/09/2006) where all of the modules doing pci_set_dma_mask
would fail with:

ata_piix 0000:00:1f.1: enabling device (0005 -> 0007)
ata_piix 0000:00:1f.1: can't derive routing for PCI INT A
ata_piix 0000:00:1f.1: BMDMA: failed to set dma mask, falling back to PIO

The issue was the Xen-SWIOTLB was allocated such as that the end of
buffer was stradling a page (and also above 4GB). The fix was
spotted by Kalev Leonid  which was to piggyback on git commit
e79f86b2 "swiotlb: Use page alignment
for early buffer allocation" which:

	We could call free_bootmem_late() if swiotlb is not used, and
	it will shrink to page alignment.

	So alloc them with page alignment at first, to avoid lose two pages

And doing that fixes the outstanding issue.

CC: stable@kernel.org
Suggested-by: default avatar"Kalev, Leonid" <Leonid.Kalev@ca.com>
Reported-and-Tested-by: default avatar"Taylor, Neal E" <Neal.Taylor@ca.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      63a74175
    • Ian Campbell's avatar
      xen: only limit memory map to maximum reservation for domain 0. · d3db7281
      Ian Campbell authored 
      d312ae87 "xen: use maximum reservation to limit amount of usable RAM"
clamped the total amount of RAM to the current maximum reservation. This is
correct for dom0 but is not correct for guest domains. In order to boot a guest
"pre-ballooned" (e.g. with memory=1G but maxmem=2G) in order to allow for
future memory expansion the guest must derive max_pfn from the e820 provided by
the toolstack and not the current maximum reservation (which can reflect only
the current maximum, not the guest lifetime max). The existing algorithm
already behaves this correctly if we do not artificially limit the maximum
number of pages for the guest case.

For a guest booted with maxmem=512, memory=128 this results in:
 [    0.000000] BIOS-provided physical RAM map:
 [    0.000000]  Xen: 0000000000000000 - 00000000000a0000 (usable)
 [    0.000000]  Xen: 00000000000a0000 - 0000000000100000 (reserved)
-[    0.000000]  Xen: 0000000000100000 - 0000000008100000 (usable)
-[    0.000000]  Xen: 0000000008100000 - 0000000020800000 (unusable)
+[    0.000000]  Xen: 0000000000100000 - 0000000020800000 (usable)
...
 [    0.000000] NX (Execute Disable) protection: active
 [    0.000000] DMI not present or invalid.
 [    0.000000] e820 update range: 0000000000000000 - 0000000000010000 (usable) ==> (reserved)
 [    0.000000] e820 remove range: 00000000000a0000 - 0000000000100000 (usable)
-[    0.000000] last_pfn = 0x8100 max_arch_pfn = 0x1000000
+[    0.000000] last_pfn = 0x20800 max_arch_pfn = 0x1000000
 [    0.000000] initial memory mapped : 0 - 027ff000
 [    0.000000] Base memory trampoline at [c009f000] 9f000 size 4096
-[    0.000000] init_memory_mapping: 0000000000000000-0000000008100000
-[    0.000000]  0000000000 - 0008100000 page 4k
-[    0.000000] kernel direct mapping tables up to 8100000 @ 27bb000-27ff000
+[    0.000000] init_memory_mapping: 0000000000000000-0000000020800000
+[    0.000000]  0000000000 - 0020800000 page 4k
+[    0.000000] kernel direct mapping tables up to 20800000 @ 26f8000-27ff000
 [    0.000000] xen: setting RW the range 27e8000 - 27ff000
 [    0.000000] 0MB HIGHMEM available.
-[    0.000000] 129MB LOWMEM available.
-[    0.000000]   mapped low ram: 0 - 08100000
-[    0.000000]   low ram: 0 - 08100000
+[    0.000000] 520MB LOWMEM available.
+[    0.000000]   mapped low ram: 0 - 20800000
+[    0.000000]   low ram: 0 - 20800000

With this change "xl mem-set <domain> 512M" will successfully increase the
guest RAM (by reducing the balloon).

There is no change for dom0.
Reported-and-Tested-by: default avatarGeorge Shuklin <george.shuklin@gmail.com>
Signed-off-by: default avatarIan Campbell <ian.campbell@citrix.com>
Cc: stable@kernel.org
Reviewed-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      d3db7281
    • Josef Bacik's avatar
      Btrfs: only set cache_generation if we setup the block group · e65cbb94
      Josef Bacik authored 
      A user reported a problem booting into a new kernel with the old format inodes.
He was panicing in cow_file_range while writing out the inode cache.  This is
because if the block group is not cached we'll just skip writing out the cache,
however if it gets dirtied again in the same transaction and it finished caching
we'd go ahead and write it out, but since we set cache_generation to the transid
we think we've already truncated it and will just carry on, running into
cow_file_range and blowing up.  We need to make sure we only set
cache_generation if we've done the truncate.  The user tested this patch and
verified that the panic no longer occured.  Thanks,
Reported-and-Tested-by: default avatarKlaus Bitto <klaus.bitto@gmail.com>
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      e65cbb94
    • Josef Bacik's avatar
      Btrfs: don't panic if orphan item already exists · ee4d89f0
      Josef Bacik authored 
      I've been hitting this BUG_ON() in btrfs_orphan_add when running xfstest 269 in
a loop.  This is because we will add an orphan item, do the truncate, the
truncate will fail for whatever reason (*cough*ENOSPC*cough*) and then we're
left with an orphan item still in the fs.  Then we come back later to do another
truncate and it blows up because we already have an orphan item.  This is ok so
just fix the BUG_ON() to only BUG() if ret is not EEXIST.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      ee4d89f0
    • Josef Bacik's avatar
      Btrfs: fix leaked space in truncate · 7041ee97
      Josef Bacik authored 
      We were occasionaly leaking space when running xfstest 269.  This is because if
we failed to start the transaction in the truncate loop we'd just goto out, but
we need to break so that the inode is removed from the orphan list and the space
is properly freed.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      7041ee97
    • Josef Bacik's avatar
      Btrfs: fix how we do delalloc reservations and how we free reservations on error · 660d3f6c
      Josef Bacik authored 
      Running xfstests 269 with some tracing my scripts kept spitting out errors about
releasing bytes that we didn't actually have reserved.  This took me down a huge
rabbit hole and it turns out the way we deal with reserved_extents is wrong,
we need to only be setting it if the reservation succeeds, otherwise the free()
method will come in and unreserve space that isn't actually reserved yet, which
can lead to other warnings and such.  The math was all working out right in the
end, but it caused all sorts of other issues in addition to making my scripts
yell and scream and generally make it impossible for me to track down the
original issue I was looking for.  The other problem is with our error handling
in the reservation code.  There are two cases that we need to deal with

1) We raced with free.  In this case free won't free anything because csum_bytes
is modified before we dro the lock in our reservation path, so free rightly
doesn't release any space because the reservation code may be depending on that
reservation.  However if we fail, we need the reservation side to do the free at
that point since that space is no longer in use.  So as it stands the code was
doing this fine and it worked out, except in case #2

2) We don't race with free.  Nobody comes in and changes anything, and our
reservation fails.  In this case we didn't reserve anything anyway and we just
need to clean up csum_bytes but not free anything.  So we keep track of
csum_bytes before we drop the lock and if it hasn't changed we know we can just
decrement csum_bytes and carry on.

Because of the case where we can race with free()'s since we have to drop our
spin_lock to do the reservation, I'm going to serialize all reservations with
the i_mutex.  We already get this for free in the heavy use paths, truncate and
file write all hold the i_mutex, just needed to add it to page_mkwrite and
various ioctl/balance things.  With this patch my space leak scripts no longer
scream bloody murder.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      660d3f6c
    • Josef Bacik's avatar
      Btrfs: deal with enospc from dirtying inodes properly · 22c44fe6
      Josef Bacik authored 
      Now that we're properly keeping track of delayed inode space we've been getting
a lot of warnings out of btrfs_dirty_inode() when running xfstest 83.  This is
because a bunch of people call mark_inode_dirty, which is void so we can't
return ENOSPC.  This needs to be fixed in a few areas

1) file_update_time - this updates the mtime and such when writing to a file,
which will call mark_inode_dirty.  So copy file_update_time into btrfs so we can
call btrfs_dirty_inode directly and return an error if we get one appropriately.

2) fix symlinks to use btrfs_setattr for ->setattr.  For some reason we weren't
setting ->setattr for symlinks, even though we should have been.  This catches
one of the cases where we were getting errors in mark_inode_dirty.

3) Fix btrfs_setattr and btrfs_setsize to call btrfs_dirty_inode directly
instead of mark_inode_dirty.  This lets us return errors properly for truncate
and chown/anything related to setattr.

4) Add a new btrfs_fs_dirty_inode which will just call btrfs_dirty_inode and
print an error if we have one.  The only remaining user we can't control for
this is touch_atime(), but we don't really want to keep people from walking
down the tree if we don't have space to save the atime update, so just complain
but don't worry about it.

With this patch xfstests 83 complains a handful of times instead of hundreds of
times.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      22c44fe6
    • Josef Bacik's avatar
      Btrfs: fix num_workers_starting bug and other bugs in async thread · 0dc3b84a
      Josef Bacik authored 
      Al pointed out we have some random problems with the way we account for
num_workers_starting in the async thread stuff.  First of all we need to make
sure to decrement num_workers_starting if we fail to start the worker, so make
__btrfs_start_workers do this.  Also fix __btrfs_start_workers so that it
doesn't call btrfs_stop_workers(), there is no point in stopping everybody if we
failed to create a worker.  Also check_pending_worker_creates needs to call
__btrfs_start_work in it's work function since it already increments
num_workers_starting.

People only start one worker at a time, so get rid of the num_workers argument
everywhere, and make btrfs_queue_worker a void since it will always succeed.
Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      0dc3b84a
    • Casey Schaufler's avatar
      BTRFS: Establish i_ops before calling d_instantiate · ad19db71
      Casey Schaufler authored 
      The Smack LSM hook for security_d_instantiate checks
the inode's i_op->getxattr value to determine if the
containing filesystem supports extended attributes.
The BTRFS filesystem sets the inode's i_op value only
after it has instantiated the inode. This results in
Smack incorrectly giving new BTRFS inodes attributes
from the filesystem defaults on the assumption that
values can't be stored on the filesystem. This patch
moves the assignment of inode operation vectors ahead
of the calls to d_instantiate, letting Smack know that
the filesystem supports extended attributes. There
should be no impact on the performance or behavior of
BTRFS.
Signed-off-by: default avatarCasey Schaufler <casey@schaufler-ca.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      ad19db71
    • Chris Mason's avatar
      Btrfs: add a cond_resched() into the worker loop · 8f3b65a3
      Chris Mason authored 
      If we have a constant stream of end_io completions or crc work,
we can hit softlockup messages from the async helper threads.  This
adds a cond_resched() into the loop to avoid them.
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      8f3b65a3
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