linux-toradex.git/fs/btrfs/extent_map.c, branch v2.6.34-rc1

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

2010-01-29T18:27:37+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: check total number of devices when removing missing
  Btrfs: check return value of open_bdev_exclusive properly
  Btrfs: do not mark the chunk as readonly if in degraded mode
  Btrfs: run orphan cleanup on default fs root
  Btrfs: fix a memory leak in btrfs_init_acl
  Btrfs: Use correct values when updating inode i_size on fallocate
  Btrfs: remove tree_search() in extent_map.c
  Btrfs: Add mount -o compress-force

Btrfs: remove tree_search() in extent_map.c

2010-01-28T21:20:38+00:00

This patch removes tree_search() in extent_map.c because it is not called by
anything.

Signed-off-by: Miao Xie 
Signed-off-by: Chris Mason

Merge branch 'for-next' into for-linus

2009-12-07T17:36:35+00:00

Conflicts:

	kernel/irq/chip.c

tree-wide: fix assorted typos all over the place

2009-12-04T14:39:55+00:00

That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa 
Signed-off-by: Jiri Kosina

Btrfs: avoid null deref in unpin_extent_cache()

2009-11-11T19:20:18+00:00

I re-orderred the checks to avoid dereferencing "em" if it was null.

Found by smatch static checker.

Signed-off-by: Dan Carpenter 
Signed-off-by: Chris Mason

Btrfs: search for an allocation hint while filling file COW

2009-09-18T20:08:52+00:00

The allocator has some nice knobs for sending hints about where
to try and allocate new blocks, but when we're doing file allocations
we're not sending any hint at all.

This commit adds a simple extent map search to see if we can
quickly and easily find a hint for the allocator.

Signed-off-by: Chris Mason

Btrfs: Fix extent replacment race

2009-09-11T17:31:07+00:00

Data COW means that whenever we write to a file, we replace any old
extent pointers with new ones.  There was a window where a readpage
might find the old extent pointers on disk and cache them in the
extent_map tree in ram in the middle of a given write replacing them.

Even though both the readpage and the write had their respective bytes
in the file locked, the extent readpage inserts may cover more bytes than
it had locked down.

This commit closes the race by keeping the new extent pinned in the extent
map tree until after the on-disk btree is properly setup with the new
extent pointers.

Signed-off-by: Chris Mason

Btrfs: switch extent_map to a rw lock

2009-09-11T17:31:05+00:00

There are two main users of the extent_map tree.  The
first is regular file inodes, where it is evenly spread
between readers and writers.

The second is the chunk allocation tree, which maps blocks from
logical addresses to phyiscal ones, and it is 99.99% reads.

The mapping tree is a point of lock contention during heavy IO
workloads, so this commit switches things to a rw lock.

Signed-off-by: Chris Mason

Btrfs: kill btrfs_cache_create

2009-04-24T19:46:04+00:00

Just use kmem_cache_create directly.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Chris Mason

Btrfs: don't export symbols

2009-04-24T19:46:04+00:00

Currently the extent_map code is only for btrfs so don't export it's
symbols.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Chris Mason