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Li Zefan 6c282eb40e Btrfs: fix defrag regression 
If a file has 3 small extents:

| ext1 | ext2 | ext3 |

Running "btrfs fi defrag" will only defrag the last two extents, if those
extent mappings hasn't been read into memory from disk.

This bug was introduced by commit 17ce6ef8d731af5edac8c39e806db4c7e1f6956f
("Btrfs: add a check to decide if we should defrag the range")

The cause is, that commit looked into previous and next extents using
lookup_extent_mapping() only.

While at it, remove the code that checks the previous extent, since
it's sufficient to check the next extent.

Signed-off-by: Li Zefan <lizefan@huawei.com>
2012-06-14 21:30:55 -04:00
..
acl.c
Btrfs: cache no acl on new inodes
2012-05-30 10:23:27 -04:00
async-thread.c
btrfs: return void in functions without error conditions
2012-03-22 01:45:34 +01:00
async-thread.h
btrfs: return void in functions without error conditions
2012-03-22 01:45:34 +01:00
backref.c
Btrfs: add inodes before dropping the extent lock in find_all_leafs
2012-05-31 19:53:08 +02:00
backref.h
Btrfs: use the tree modification log for backref resolving
2012-05-30 15:17:34 +02:00
btrfs_inode.h
Btrfs: call filemap_fdatawrite twice for compression
2012-06-14 21:30:54 -04:00
check-integrity.c
Btrfs: use rcu to protect device->name
2012-06-14 21:29:16 -04:00
check-integrity.h
Btrfs: add optional integrity check code
2011-12-21 19:14:09 +01:00
compat.h
Btrfs: drop remaining LINUX_KERNEL_VERSION checks and compat code
2009-01-06 09:38:55 -05:00
compression.c
Merge branch 'for-linus-min' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
2012-04-13 19:41:27 -07:00
compression.h
btrfs: return void in functions without error conditions
2012-03-22 01:45:34 +01:00
ctree.c
Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus
2012-05-31 16:49:53 -04:00
ctree.h
Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus
2012-05-31 16:49:53 -04:00
delayed-inode.c
Btrfs: convert the inode bit field to use the actual bit operations
2012-05-30 10:23:36 -04:00
delayed-inode.h
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
delayed-ref.c
Btrfs: use delayed ref sequence numbers for all fs-tree updates
2012-05-30 18:18:21 +02:00
delayed-ref.h
Btrfs: use delayed ref sequence numbers for all fs-tree updates
2012-05-30 18:18:21 +02:00
dir-item.c
btrfs: replace many BUG_ONs with proper error handling
2012-03-22 11:52:54 +01:00
disk-io.c
Btrfs: use rcu to protect device->name
2012-06-14 21:29:16 -04:00
disk-io.h
btrfs: Drop unused function btrfs_abort_devices()
2012-05-30 10:23:39 -04:00
export.c
btrfs: replace many BUG_ONs with proper error handling
2012-03-22 11:52:54 +01:00
export.h
NFS support for btrfs - v3
2008-09-25 11:04:06 -04:00
extent_io.c
Btrfs: use rcu to protect device->name
2012-06-14 21:29:16 -04:00
extent_io.h
Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus
2012-05-31 16:49:53 -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: fix structs where bitfields and spinlock/atomic share 8B word
2012-02-15 16:40:25 +01:00
extent-tree.c
Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus
2012-05-31 16:49:53 -04:00
file-item.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
2012-03-30 12:44:29 -07:00
file.c
Btrfs: check to see if the inode is in the log before fsyncing
2012-05-30 10:23:42 -04:00
free-space-cache.c
Btrfs: merge contigous regions when loading free space cache
2012-05-30 10:23:36 -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
Merge branch 'error-handling' into for-linus
2012-03-28 20:31:37 -04:00
inode-map.c
Btrfs: show useful info in space reservation tracepoint
2012-03-29 09:57:44 -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: call filemap_fdatawrite twice for compression
2012-06-14 21:30:54 -04:00
ioctl.c
Btrfs: fix defrag regression
2012-06-14 21:30:55 -04:00
ioctl.h
Btrfs: add ioctl to get and reset the device stats
2012-05-30 10:23:40 -04:00
Kconfig
Btrfs: add config option to enable btrfs integrity check
2011-12-21 19:14:16 +01:00
locking.c
btrfs: return void in functions without error conditions
2012-03-22 01:45:34 +01:00
locking.h
btrfs: return void in functions without error conditions
2012-03-22 01:45:34 +01:00
lzo.c
btrfs: remove the second argument of k[un]map_atomic()
2012-03-20 21:48:21 +08:00
Makefile
Merge branch 'integrity-check-patch-v2' of git://btrfs.giantdisaster.de/git/btrfs into integration
2012-01-16 15:27:58 -05:00
ordered-data.c
Btrfs: call filemap_fdatawrite twice for compression
2012-06-14 21:30:54 -04:00
ordered-data.h
Btrfs: finish ordered extents in their own thread
2012-05-30 10:23:33 -04:00
orphan.c
btrfs: replace many BUG_ONs with proper error handling
2012-03-22 11:52:54 +01:00
print-tree.c
Btrfs: read device stats on mount, write modified ones during commit
2012-05-30 10:23:41 -04:00
print-tree.h
Btrfs: Create extent_buffer interface for large blocksizes
2008-09-25 11:03:56 -04:00
rcu-string.h
Btrfs: use rcu to protect device->name
2012-06-14 21:29:16 -04:00
reada.c
Btrfs: set ioprio of scrub readahead to idle
2012-05-30 10:23:43 -04:00
relocation.c
Btrfs: Fix space checking during fs resize
2012-04-27 13:55:14 -04:00
root-tree.c
btrfs: replace many BUG_ONs with proper error handling
2012-03-22 11:52:54 +01:00
scrub.c
Btrfs: use rcu to protect device->name
2012-06-14 21:29:16 -04:00
struct-funcs.c
Btrfs: add the ability to cache a pointer into the eb
2012-03-26 17:04:23 -04:00
super.c
Btrfs: implement ->show_devname
2012-06-14 21:30:37 -04:00
sysfs.c
btrfs: Remove unused sysfs code
2011-06-17 14:54:18 -04:00
transaction.c
Btrfs: abort the transaction if the commit fails
2012-06-14 21:29:13 -04:00
transaction.h
btrfs: enhance transaction abort infrastructure
2012-03-22 01:45:40 +01:00
tree-defrag.c
btrfs: drop unused parameter from btrfs_release_path
2011-05-02 13:57:22 +02:00
tree-log.c
Btrfs: fix return code in drop_objectid_items
2012-05-30 10:23:42 -04:00
tree-log.h
btrfs: return void in functions without error conditions
2012-03-22 01:45:34 +01:00
ulist.c
Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus
2012-05-31 16:49:53 -04:00
ulist.h
Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus
2012-05-31 16:49:53 -04:00
version.h
Update Btrfs files for in-kernel usage
2008-09-25 15:41:59 -04:00
volumes.c
Btrfs: use rcu to protect device->name
2012-06-14 21:29:16 -04:00
volumes.h
Btrfs: use rcu to protect device->name
2012-06-14 21:29:16 -04:00
xattr.c
Btrfs: use i_version instead of our own sequence
2012-05-30 10:23:27 -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
btrfs: remove the second argument of k[un]map_atomic()
2012-03-20 21:48:21 +08:00