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linux/fs/btrfs
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Josef Bacik 37d3cdddf5 Btrfs: make tree_search_offset more flexible in its searching 
Sometimes we end up freeing a reserved extent because we don't need it, however
this means that its possible for transaction->last_alloc to point to the middle
of a free area.

When we search for free space in find_free_space we do a tree_search_offset
with contains set to 0, because we want it to find the next best free area if
we do not have an offset starting on the given offset.

Unfortunately that currently means that if the offset we were given as a hint
points to the middle of a free area, we won't find anything.  This is especially
bad if we happened to last allocate from the big huge chunk of a newly formed
block group, since we won't find anything and have to go back and search the
long way around.

This fixes this problem by making it so that we return the free space area
regardless of the contains variable.  This made cache missing happen _alot_
less, and speeds things up considerably.

Signed-off-by: Josef Bacik <jbacik@redhat.com>
 		2008-10-10 10:24:32 -04:00
..
COPYING Btrfs: add GPLv2 2007-06-12 09:07:21 -04:00
INSTALL Btrfs: Documentation update 2007-06-22 14:49:31 -04:00
Makefile Btrfs: Fix makefile for builing btrfs static 2008-10-09 11:52:35 -04:00
acl.c Btrfs: optimize btrget/set/removexattr 2008-09-25 11:04:07 -04:00
async-thread.c Btrfs: fix multi-device code to use raid policies set by mkfs 2008-09-30 19:36:34 -04:00
async-thread.h Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
btrfs_inode.h Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
compat.h Remove Btrfs compat code for older kernels 2008-09-25 15:41:59 -04:00
crc32c.h Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
ctree.c Btrfs: Remove offset field from struct btrfs_extent_ref 2008-10-09 11:46:24 -04:00
ctree.h Btrfs: Fix subvolume creation locking rules 2008-10-09 13:39:39 -04:00
dir-item.c Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
disk-io.c Btrfs: disk-io.c (open_ctree): avoid leaks upon allocation failure 2008-10-01 19:09:51 -04:00
disk-io.h Btrfs: Tree logging fixes 2008-09-25 11:04:07 -04:00
export.c Remove Btrfs compat code for older kernels 2008-09-25 15:41:59 -04:00
export.h NFS support for btrfs - v3 2008-09-25 11:04:06 -04:00
extent-tree.c Btrfs: Remove offset field from struct btrfs_extent_ref 2008-10-09 11:46:24 -04:00
extent_io.c Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
extent_io.h Btrfs: extent_map and data=ordered fixes for space balancing 2008-09-26 10:05:38 -04:00
extent_map.c Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
extent_map.h Btrfs: Fix some data=ordered related data corruptions 2008-09-25 11:04:05 -04:00
file-item.c Btrfs: Fix variable init during csum creation 2008-09-25 11:04:07 -04:00
file.c Btrfs: Remove offset field from struct btrfs_extent_ref 2008-10-09 11:46:24 -04:00
free-space-cache.c Btrfs: make tree_search_offset more flexible in its searching 2008-10-10 10:24:32 -04:00
hash.h Switch btrfs_name_hash() to crc32c 2008-09-25 11:04:06 -04:00
inode-item.c Btrfs: Implement new dir index format 2008-09-25 11:04:05 -04:00
inode-map.c Btrfs: extent_map and data=ordered fixes for space balancing 2008-09-26 10:05:38 -04:00
inode.c Btrfs: Fix subvolume creation locking rules 2008-10-09 13:39:39 -04:00
ioctl.c Btrfs: Don't call security_inode_mkdir during subvol creation 2008-10-10 10:23:22 -04:00
ioctl.h Btrfs: transaction ioctls 2008-09-25 11:04:03 -04:00
locking.c Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
locking.h btrfs_search_slot: reduce lock contention by cowing in two stages 2008-09-25 11:04:06 -04:00
ordered-data.c Btrfs: O_DIRECT writes via buffered writes + invaldiate 2008-10-03 12:30:02 -04:00
ordered-data.h Btrfs: O_DIRECT writes via buffered writes + invaldiate 2008-10-03 12:30:02 -04:00
orphan.c Btrfs: Create orphan inode records to prevent lost files after a crash 2008-09-25 11:04:05 -04:00
print-tree.c Btrfs: Remove offset field from struct btrfs_extent_ref 2008-10-09 11:46:24 -04:00
print-tree.h Btrfs: Create extent_buffer interface for large blocksizes 2008-09-25 11:03:56 -04:00
ref-cache.c Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
ref-cache.h Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
root-tree.c Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
struct-funcs.c Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
super.c Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
sysfs.c Remove Btrfs compat code for older kernels 2008-09-25 15:41:59 -04:00
transaction.c Btrfs: remove last_log_alloc allocator optimization 2008-10-03 12:24:01 -04:00
transaction.h Btrfs: Record dirty pages tree-log pages in an extent_io tree 2008-09-25 11:04:07 -04:00
tree-defrag.c Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
tree-log.c Btrfs: Remove offset field from struct btrfs_extent_ref 2008-10-09 11:46:24 -04:00
tree-log.h Btrfs: Add a write ahead tree log to optimize synchronous operations 2008-09-25 11:04:07 -04:00
version.h Update Btrfs files for in-kernel usage 2008-09-25 15:41:59 -04:00
version.sh Btrfs: Update version.sh to v0.16 2008-09-25 11:04:06 -04:00
volumes.c Btrfs: cast bio->bi_sector to a u64 before shifting 2008-10-03 16:31:08 -04:00
volumes.h Btrfs: Fix the multi-bio code to save the original bio for completion 2008-09-25 11:04:06 -04:00
xattr.c Btrfs: optimize btrget/set/removexattr 2008-09-25 11:04:07 -04:00
xattr.h Btrfs: optimize btrget/set/removexattr 2008-09-25 11:04:07 -04:00