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alistair23-linux/fs/btrfs
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Liu Bo df57dbe6bf Btrfs: make btrfs's allocation smoothly with preallocation 
For backref walking, we've introduce delayed ref's sequence.  However,
it changes our preallocation behavior.

The story is that when we preallocate an extent and then mark it written
piece by piece, the ideal case should be that we don't need to COW the
extent, which is why we use 'preallocate'.

But we may not make use of preallocation, since when we check for cross refs on
the extent, we may have two ref entries which have the same content except
the sequence value, and we recognize them as cross refs and do COW to allocate
another extent.

So we end up with several pieces of space instead of an whole extent.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2012-07-23 16:28:10 -04:00
..
acl.c Btrfs: cache no acl on new inodes 2012-05-30 10:23:27 -04:00
async-thread.c
async-thread.h
backref.c Btrfs: leave critical region in btrfs_find_all_roots as soon as possible 2012-06-27 16:34:39 +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: kill free_space pointer from inode structure 2012-07-23 16:28:05 -04:00
check-integrity.c Btrfs: use rcu to protect device->name 2012-06-14 21:29:16 -04:00
check-integrity.h
compat.h
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
ctree.c Btrfs: fix buffer leak in btrfs_next_old_leaf 2012-07-23 16:28:03 -04:00
ctree.h Btrfs: rewrite BTRFS_SETGET_FUNCS 2012-07-23 16:28:06 -04:00
delayed-inode.c Btrfs: zero unused bytes in inode item 2012-07-23 16:28:05 -04:00
delayed-inode.h Btrfs: flush delayed inodes if we're short on space 2012-07-23 15:41:40 -04:00
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
disk-io.c Btrfs: avoid I/O repair BUG() from btree_read_extent_buffer_pages() 2012-07-23 16:27:59 -04:00
disk-io.h btrfs: Drop unused function btrfs_abort_devices() 2012-05-30 10:23:39 -04:00
export.c ->encode_fh() API change 2012-05-29 23:28:33 -04:00
export.h
extent-tree.c Btrfs: make btrfs's allocation smoothly with preallocation 2012-07-23 16:28:10 -04:00
extent_io.c Btrfs: lock the transition from dirty to writeback for an eb 2012-07-23 16:28:09 -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
extent_map.h
file-item.c Btrfs: kill root from btrfs_is_free_space_inode 2012-07-23 16:28:00 -04:00
file.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2012-07-05 13:06:25 -07:00
free-space-cache.c Btrfs: do not count in readonly bytes 2012-07-23 16:28:03 -04:00
free-space-cache.h
hash.h
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
inode.c Btrfs: zero unused bytes in inode item 2012-07-23 16:28:05 -04:00
ioctl.c Btrfs: do not set subvolume flags in readonly mode 2012-07-23 16:27:58 -04:00
ioctl.h Btrfs: add DEVICE_READY ioctl 2012-07-23 16:27:42 -04:00
Kconfig
locking.c Btrfs: reduce calls to wake_up on uncontended locks 2012-07-23 15:36:18 -04:00
locking.h
lzo.c
Makefile
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
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
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 error handling in __add_reloc_root() 2012-07-23 16:27:53 -04:00
root-tree.c
scrub.c Btrfs: use rcu to protect device->name 2012-06-14 21:29:16 -04:00
struct-funcs.c Btrfs: rewrite BTRFS_SETGET_FUNCS 2012-07-23 16:28:06 -04:00
super.c Btrfs: add DEVICE_READY ioctl 2012-07-23 16:27:42 -04:00
sysfs.c
transaction.c Btrfs: change how we indicate we're adding csums 2012-07-23 16:27:55 -04:00
transaction.h Btrfs: change how we indicate we're adding csums 2012-07-23 16:27:55 -04:00
tree-defrag.c
tree-log.c Btrfs: return error of btrfs_update_inode() to caller 2012-07-23 16:27:54 -04:00
tree-log.h
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
volumes.c Btrfs: suppress printk() if all device I/O stats are zero 2012-07-23 16:28:07 -04:00
volumes.h Btrfs: add DEVICE_READY ioctl 2012-07-23 16:27:42 -04:00
xattr.c Btrfs: use i_version instead of our own sequence 2012-05-30 10:23:27 -04:00
xattr.h
zlib.c