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Chris Mason f7f43cc841 Btrfs: make sure not to defrag extents past i_size 
The btrfs file defrag code will loop through the extents and
force COW on them.  But there is a concurrent truncate in the middle of
the defrag, it might end up defragging the same range over and over
again.

The problem is that writepage won't go through and do anything on pages
past i_size, so the cow won't happen, so the file will appear to still
be fragmented.  defrag will end up hitting the same extents again and
again.

In the worst case, the truncate can actually live lock with the defrag
because the defrag keeps creating new ordered extents which the truncate
code keeps waiting on.

The fix here is to make defrag check for i_size inside the main loop,
instead of just once before the looping starts.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 		2011-10-11 11:45:55 -04:00
..
Kconfig
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Makefile Btrfs: make acl functions really no-op if acl is not enabled 2011-08-01 14:30:48 -04:00
acl.c Btrfs: make acl functions really no-op if acl is not enabled 2011-08-01 14:30:48 -04:00
async-thread.c
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async-thread.h
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btrfs_inode.h Btrfs: fix an oops when deleting snapshots 2011-09-11 10:52:24 -04:00
compat.h
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compression.c Btrfs: check the nodatasum flag when writing compressed files 2011-08-01 14:30:46 -04:00
compression.h btrfs: rename variables clashing with global function names 2011-05-02 13:57:19 +02:00
ctree.c Btrfs: remove lockdep magic from btrfs_next_leaf 2011-07-27 12:46:47 -04:00
ctree.h Btrfs: use plain page_address() in header fields setget functions 2011-08-16 21:09:15 -04:00
delayed-inode.c Btrfs: switch the btrfs tree locks to reader/writer 2011-07-27 12:46:46 -04:00
delayed-inode.h btrfs: fix inconsonant inode information 2011-06-27 11:34:27 -04:00
delayed-ref.c btrfs: remove old unused commented out code 2011-05-06 12:34:10 +02:00
delayed-ref.h btrfs: remove all unused functions 2011-05-06 12:34:03 +02:00
dir-item.c Btrfs: remove redundant code for dir item lookup 2011-08-01 14:30:48 -04:00
disk-io.c Btrfs: make a lockdep class for each root 2011-07-27 12:46:46 -04:00
disk-io.h Btrfs: make a lockdep class for each root 2011-07-27 12:46:46 -04:00
export.c Merge branch 'ino-alloc' of git://repo.or.cz/linux-btrfs-devel into inode_numbers 2011-05-21 09:27:38 -04:00
export.h
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extent-tree.c Btrfs: forced readonly when btrfs_drop_snapshot() fails 2011-08-16 21:09:15 -04:00
extent_io.c Btrfs: don't call writepages from within write_full_page 2011-08-01 14:37:36 -04:00
extent_io.h Btrfs: remove unused members from struct extent_state 2011-08-01 14:30:50 -04:00
extent_map.c Btrfs: clean up code for merging extent maps 2011-08-01 14:30:50 -04:00
extent_map.h btrfs: drop gfp parameter from alloc_extent_map 2011-05-02 13:57:21 +02:00
file-item.c Btrfs: skip locking if searching the commit root in csum lookup 2011-09-11 10:52:24 -04:00
file.c Btrfs: force a page fault if we have a shorty copy on a page boundary 2011-09-30 15:23:54 -04:00
free-space-cache.c Btrfs: reset to appropriate block rsv after orphan operations 2011-09-11 10:52:24 -04:00
free-space-cache.h btrfs: remove all unused functions 2011-05-06 12:34:03 +02:00
hash.h
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inode-item.c Btrfs: BUG_ON is deleted from the caller of btrfs_truncate_item & btrfs_extend_item 2011-05-23 13:24:39 -04:00
inode-map.c btrfs: add helper for fs_info->closing 2011-06-04 08:11:22 -04:00
inode-map.h Btrfs: Support reading/writing on disk free ino cache 2011-04-25 16:46:11 +08:00
inode.c btrfs: fix d_off in the first dirent 2011-09-18 10:20:46 -04:00
ioctl.c Btrfs: make sure not to defrag extents past i_size 2011-10-11 11:45:55 -04:00
ioctl.h Btrfs: add mount -o auto_defrag 2011-05-26 17:52:15 -04:00
locking.c Btrfs: switch the btrfs tree locks to reader/writer 2011-07-27 12:46:46 -04:00
locking.h Btrfs: switch the btrfs tree locks to reader/writer 2011-07-27 12:46:46 -04:00
lzo.c Btrfs: Avoid accessing unmapped kernel address 2011-02-16 15:37:58 -05:00
ordered-data.c Btrfs: add initial tracepoint support for btrfs 2011-03-28 05:37:33 -04:00
ordered-data.h
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orphan.c
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print-tree.c btrfs: fix missing break in switch phrase 2011-01-28 16:40:37 -05:00
print-tree.h
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relocation.c Merge branch 'integration' into for-linus 2011-07-27 16:18:13 -04:00
root-tree.c btrfs: make btrfs_set_root_node void 2011-08-01 14:30:44 -04:00
scrub.c btrfs: remove unneeded includes from scrub.c 2011-06-10 14:59:52 +02:00
struct-funcs.c Btrfs: stop using highmem for extent_buffers 2011-07-27 12:46:45 -04:00
super.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable 2011-07-08 23:25:45 -07:00
sysfs.c btrfs: Remove unused sysfs code 2011-06-17 14:54:18 -04:00
transaction.c Btrfs: fix misuse of trans block rsv 2011-09-11 10:52:24 -04:00
transaction.h Merge branch 'for-chris' of 2011-05-28 07:00:39 -04:00
tree-defrag.c btrfs: drop unused parameter from btrfs_release_path 2011-05-02 13:57:22 +02:00
tree-log.c Btrfs: fix an oops of log replay 2011-08-16 21:09:15 -04:00
tree-log.h btrfs: remove unused function prototypes 2011-05-04 14:01:26 +02:00
version.h
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volumes.c Btrfs: fix uninitialized sync_pending 2011-08-16 21:09:31 -04:00
volumes.h Btrfs: detect wether a device supports discard 2011-08-16 21:09:15 -04:00
xattr.c btrfs: xattr: fix attribute removal 2011-09-11 10:52:25 -04:00
xattr.h fs/vfs/security: pass last path component to LSM on inode creation 2011-02-01 11:12:29 -05:00
zlib.c zlib: slim down zlib_deflate() workspace when possible 2011-03-22 17:44:17 -07:00