linux.git/fs/btrfs, branch v2.6.29-rc2

Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

2009-01-16T17:32:33+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: fix ioctl arg size (userland incompatible change!)
  Btrfs: Clear the device->running_pending flag before bailing on congestion

Btrfs: fix ioctl arg size (userland incompatible change!)

2009-01-16T16:59:08+00:00

The structure used to send device in btrfs ioctl calls was not
properly aligned, and so 32 bit ioctls would not work properly on
64 bit kernels.

We could fix this with compat ioctls, but we're just one byte away
and it doesn't make sense at this stage to carry about the compat ioctls
forever at this stage in the project.

This patch brings the ioctl arg up to an evenly aligned 4k.

Signed-off-by: Chris Mason

Btrfs: Clear the device->running_pending flag before bailing on congestion

2009-01-16T16:58:19+00:00

Btrfs maintains a queue of async bio submissions so the checksumming
threads don't have to wait on get_request_wait.  In order to avoid
extra wakeups, this code has a running_pending flag that is used
to tell new submissions they don't need to wake the thread.

When the threads notice congestion on a single device, they
may decide to requeue the job and move on to other devices.  This
makes sure the running_pending flag is cleared before the
job is requeued.

It should help avoid IO stalls by making sure the task is woken up
when new submissions come in.

Signed-off-by: Chris Mason

btrfs & squashfs: Move btrfs and squashfsto's magic number to

2009-01-16T00:39:38+00:00

Use the standard magic.h for btrfs and squashfs.

Signed-off-by: Qinghuang Feng 
Cc: Phillip Lougher 
Cc: Chris Mason 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

btrfs: fix for write_super_lockfs/unlockfs error handling

2009-01-10T14:09:52+00:00

Commit c4be0c1dc4cdc37b175579be1460f15ac6495e9a added the ability for
write_super_lockfs to return errors, and renamed them to match.  But
btrfs didn't get converted.

Do the minimal conversion to make it compile again.

Signed-off-by: Linus Torvalds

Btrfs: explicitly mark the tree log root for writeback

2009-01-09T18:14:17+00:00

Each subvolume has an extent_state_tree used to mark metadata
that needs to be sent to disk while syncing the tree.  This is
used in addition to the dirty bits on the pages themselves so that
a single subvolume can be sent to disk efficiently in disk order.

Normally this marking happens in btrfs_alloc_free_block, which also does
special recording of dirty tree blocks for the tree log roots.

Yan Zheng noticed that when the root of the log tree is allocated, it is added
to the wrong writeback list.  The fix used here is to explicitly set
it dirty as part of tree log creation.

Signed-off-by: Chris Mason

Btrfs: Drop the hardware crc32c asm code

2009-01-08T00:56:59+00:00

This is already in the arch specific directories in mainline and
shouldn't be copied into btrfs.

Signed-off-by: Chris Mason

Btrfs: Add Documentation/filesystem/btrfs.txt, remove old COPYING

2009-01-07T14:54:24+00:00

Signed-off-by: Chris Mason

Btrfs: kmap_atomic(KM_USER0) is safe for btrfs_readpage_end_io_hook

2009-01-07T14:48:51+00:00

None of the checksum verification code schedules, so we can use the faster
kmap_atomic

Signed-off-by: Chris Mason

Btrfs: Don't use kmap_atomic(..., KM_IRQ0) during checksum verifies

2009-01-06T18:26:40+00:00

Checksum verification happens in a helper thread, and there is no
need to mess with interrupts.  This switches to kmap() instead.

Signed-off-by: Chris Mason