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OpenCloudOS-Kernel/fs/btrfs
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Li Zefan 008873eafb Btrfs: honor extent thresh during defragmentation 
We won't defrag an extent, if it's bigger than the threshold we
specified and there's no small extent before it, but actually
the code doesn't work this way.

There are three bugs:

- When should_defrag_range() decides we should keep on defragmenting
  an extent, last_len is not incremented. (old bug)

- The length that passes to should_defrag_range() is not the length
  we're going to defrag. (new bug)

- We always defrag 256K bytes data, and a big extent can be part of
  this range. (new bug)

For a file with 4 extents:

        | 4K | 4K | 256K | 256K |

The result of defrag with (the default) 256K extent thresh should be:

        | 264K | 256K |

but with those bugs, we'll get:

        | 520K |

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
 		2011-10-20 18:10:39 +02:00
..
Kconfig btrfs: Add lzo compression support 2010-12-22 23:15:47 +08:00
Makefile Btrfs: make acl functions really no-op if acl is not enabled 2011-08-01 14:30:48 -04:00
acl.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable 2011-08-02 21:14:05 -10:00
async-thread.c Btrfs: don't walk around with task->state != TASK_RUNNING 2010-05-25 10:34:58 -04:00
async-thread.h Btrfs: fix deadlock on async thread startup 2009-10-05 09:44:45 -04:00
btrfs_inode.h Btrfs: calculate checksum space correctly 2011-10-19 15:12:31 -04:00
compat.h Btrfs: drop remaining LINUX_KERNEL_VERSION checks and compat code 2009-01-06 09:38:55 -05:00
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: seperate out btrfs_block_rsv_check out into 2 different functions 2011-10-19 15:12:59 -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 atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
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: allow us to overcommit our enospc reservations 2011-10-19 15:12:50 -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 NFS support for btrfs - v3 2008-09-25 11:04:06 -04:00
extent-tree.c Btrfs: if we have a lot of pinned space, commit the transaction 2011-10-19 15:13:00 -04:00
extent_io.c Btrfs: introduce convert_extent_bit 2011-10-19 15:12:47 -04:00
extent_io.h Btrfs: stop using write_one_page 2011-10-19 15:12:48 -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: use the inode's mapping mask for allocating pages 2011-10-19 15:12:45 -04:00
free-space-cache.c Btrfs: don't flush the cache inode before writing it 2011-10-19 15:13:01 -04:00
free-space-cache.h btrfs: remove all unused functions 2011-05-06 12:34:03 +02:00
hash.h Btrfs: remove crc32c.h and use libcrc32c directly. 2009-06-10 11:29:53 -04:00
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: handle enospc accounting for free space inodes 2011-10-19 15:12:42 -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: seperate out btrfs_block_rsv_check out into 2 different functions 2011-10-19 15:12:59 -04:00
ioctl.c Btrfs: honor extent thresh during defragmentation 2011-10-20 18:10:39 +02:00
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 btrfs: Allow to add new compression algorithm 2010-12-22 23:15:45 +08:00
orphan.c Btrfs: fixup return code for btrfs_del_orphan_item 2010-12-09 13:57:15 -05:00
print-tree.c btrfs: fix missing break in switch phrase 2011-01-28 16:40:37 -05:00
print-tree.h Btrfs: Create extent_buffer interface for large blocksizes 2008-09-25 11:03:56 -04:00
relocation.c btrfs: check file extent backref offset underflow 2011-10-20 18:10:31 +02:00
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 btrfs: trivial fix, a potential memory leak in btrfs_parse_early_options() 2011-10-20 18:10:38 +02:00
sysfs.c btrfs: Remove unused sysfs code 2011-06-17 14:54:18 -04:00
transaction.c Btrfs: seperate out btrfs_block_rsv_check out into 2 different functions 2011-10-19 15:12:59 -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 Update Btrfs files for in-kernel usage 2008-09-25 15:41:59 -04:00
volumes.c Btrfs: allow us to overcommit our enospc reservations 2011-10-19 15:12:50 -04:00
volumes.h Btrfs: detect wether a device supports discard 2011-08-16 21:09:15 -04:00
xattr.c Btrfs: fix regression in re-setting a large xattr 2011-10-19 15:12:56 -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