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6219872dc6
linux/fs/btrfs
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Filipe Manana 6219872dc6 Btrfs: lookup for block group only if needed when freeing a tree block 
Very often our extent buffer's header generation doesn't match the current
transaction's id or it is also referenced by other trees (snapshots), so
we don't need the corresponding block group cache object. Therefore only
search for it if we are going to use it, so we avoid an unnecessary search
in the block groups rbtree (and acquiring and releasing its spinlock).

Freeing a tree block is performed when COWing or deleting a node/leaf,
which implies we are holding the node/leaf's parent node lock, therefore
reducing the amount of time spent when freeing a tree block helps reducing
the amount of time we are holding the parent node's lock.

For example, for a run of xfstests/generic/083, the block group cache
object was needed only 682 times for a total of 226691 calls to free
a tree block.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
2015-01-21 18:02:04 -08:00
..
tests btrfs: switch extent_state state to unsigned 2015-01-21 18:02:04 -08:00
acl.c btrfs: remove useless ACL check 2014-06-09 17:20:42 -07:00
async-thread.c btrfs: remove unlikely from NULL checks 2014-10-02 16:06:19 +02:00
async-thread.h Btrfs: implement repair function when direct read fails 2014-09-17 13:39:01 -07:00
backref.c btrfs: cleanup, remove inode_ref_info helper 2015-01-14 19:23:47 +01:00
backref.h btrfs: cleanup, remove inode_item_info helper 2015-01-14 19:23:47 +01:00
btrfs_inode.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2014-10-11 08:03:52 -04:00
check-integrity.c Btrfs: include vmalloc.h in check-integrity.c 2014-11-25 06:01:11 -08:00
check-integrity.h
compression.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2014-12-12 11:15:23 -08:00
compression.h btrfs: zero out left over bytes after processing compression streams 2014-11-30 09:33:51 -08:00
ctree.c Btrfs: fix setup_leaf_for_split() to avoid leaf corruption 2015-01-21 18:02:03 -08:00
ctree.h Btrfs: track dirty block groups on their own list 2015-01-21 17:36:52 -08:00
delayed-inode.c Btrfs: don't delay inode ref updates during log replay 2015-01-02 14:47:56 -05:00
delayed-inode.h
delayed-ref.c Btrfs: rework qgroup accounting 2014-06-09 17:20:48 -07:00
delayed-ref.h Btrfs: rework qgroup accounting 2014-06-09 17:20:48 -07:00
dev-replace.c Merge branch 'raid56-scrub-replace' of git://github.com/miaoxie/linux-btrfs into for-linus 2014-12-02 18:42:03 -08:00
dev-replace.h
dir-item.c Btrfs: make xattr replace operations atomic 2014-11-20 17:20:07 -08:00
disk-io.c btrfs: set proper message level for skinny metadata 2015-01-21 18:02:03 -08:00
disk-io.h btrfs: sink blocksize parameter to btrfs_find_create_tree_block 2014-12-12 18:07:21 +01:00
export.c btrfs: kill the key type accessor helpers 2014-09-17 13:37:12 -07:00
export.h
extent_io.c btrfs: switch extent_state state to unsigned 2015-01-21 18:02:04 -08:00
extent_io.h btrfs: switch extent_state state to unsigned 2015-01-21 18:02:04 -08:00
extent_map.c Btrfs: do not move em to modified list when unpinning 2014-11-21 11:59:54 -08:00
extent_map.h Btrfs: fix NULL pointer crash when running balance and scrub concurrently 2014-06-19 14:20:55 -07:00
extent-tree.c Btrfs: lookup for block group only if needed when freeing a tree block 2015-01-21 18:02:04 -08:00
file-item.c Btrfs: fix kfree on list_head in btrfs_lookup_csums_range error cleanup 2014-11-04 06:59:04 -08:00
file.c Btrfs: fix snapshot inconsistency after a file write followed by truncate 2014-11-25 07:41:23 -08:00
free-space-cache.c Btrfs: track dirty block groups on their own list 2015-01-21 17:36:52 -08:00
free-space-cache.h Btrfs: fix race between writing free space cache and trimming 2014-12-02 18:35:09 -08:00
hash.c btrfs: LLVMLinux: Remove VLAIS 2014-10-14 10:51:22 +02:00
hash.h
inode-item.c btrfs: kill the key type accessor helpers 2014-09-17 13:37:12 -07:00
inode-map.c Btrfs: fix race between writing free space cache and trimming 2014-12-02 18:35:09 -08:00
inode-map.h
inode.c btrfs: switch extent_state state to unsigned 2015-01-21 18:02:04 -08:00
ioctl.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2014-12-12 11:15:23 -08:00
Kconfig
locking.c btrfs: fix lockups from btrfs_clear_path_blocking 2014-11-19 10:34:35 -08:00
locking.h btrfs: fix lockups from btrfs_clear_path_blocking 2014-11-19 10:34:35 -08:00
lzo.c btrfs: zero out left over bytes after processing compression streams 2014-11-30 09:33:51 -08:00
Makefile Btrfs: add sanity tests for new qgroup accounting code 2014-06-09 17:20:49 -07:00
math.h
ordered-data.c Btrfs: collect only the necessary ordered extents on ranged fsync 2014-11-21 11:59:56 -08:00
ordered-data.h Btrfs: collect only the necessary ordered extents on ranged fsync 2014-11-21 11:59:56 -08:00
orphan.c btrfs: kill the key type accessor helpers 2014-09-17 13:37:12 -07:00
print-tree.c btrfs: remove parameter blocksize from read_tree_block 2014-10-02 17:14:50 +02:00
print-tree.h
props.c
props.h
qgroup.c btrfs: move checks for DUMMY_ROOT into a helper 2014-10-02 17:30:33 +02:00
qgroup.h btrfs: qgroup: account shared subtrees during snapshot delete 2014-08-15 07:43:14 -07:00
raid56.c Btrfs, raid56: fix use-after-free problem in the final device replace procedure on raid56 2014-12-03 10:18:47 +08:00
raid56.h Btrfs, raid56: fix use-after-free problem in the final device replace procedure on raid56 2014-12-03 10:18:47 +08:00
rcu-string.h
reada.c btrfs: sink blocksize parameter to reada_tree_block_flagged 2014-12-12 18:07:20 +01:00
relocation.c btrfs: sink blocksize parameter to tree_block_processed 2014-12-12 18:07:22 +01:00
root-tree.c Btrfs: use bitfield instead of integer data type for the some variants in btrfs_root 2014-06-09 17:20:40 -07:00
scrub.c btrfs: expand btrfs_find_item if found_key is NULL 2015-01-14 19:23:48 +01:00
send.c Btrfs: ensure send always works on roots without orphans 2014-11-25 07:41:23 -08:00
send.h
struct-funcs.c
super.c btrfs: remove a no-op unfreeze superbock callback 2015-01-21 18:02:04 -08:00
sysfs.c btrfs: move commit out of sysfs when changing label 2014-11-12 16:53:15 +01:00
sysfs.h btrfs: code optimize: BTRFS_ATTR_RW could set the mode 2014-09-17 13:37:59 -07:00
transaction.c Btrfs: track dirty block groups on their own list 2015-01-21 17:36:52 -08:00
transaction.h Btrfs: track dirty block groups on their own list 2015-01-21 17:36:52 -08:00
tree-defrag.c Btrfs: use bitfield instead of integer data type for the some variants in btrfs_root 2014-06-09 17:20:40 -07:00
tree-log.c Merge branch 'cleanup/blocksize-diet-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus 2015-01-21 17:49:35 -08:00
tree-log.h Btrfs: fix data corruption after fast fsync and writeback error 2014-09-19 06:57:51 -07:00
ulist.c Btrfs: do not export ulist functions 2014-01-29 07:06:27 -08:00
ulist.h Btrfs: Fix memory corruption by ulist_add_merge() on 32bit arch 2014-08-15 07:43:19 -07:00
uuid-tree.c Btrfs: make btrfs_search_forward return with nodes unlocked 2014-09-17 13:38:02 -07:00
volumes.c Merge branch 'cleanup/blocksize-diet-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus 2015-01-21 17:49:35 -08:00
volumes.h Merge branch 'raid56-scrub-replace' of git://github.com/miaoxie/linux-btrfs into for-linus 2014-12-02 18:42:03 -08:00
xattr.c Btrfs: make xattr replace operations atomic 2014-11-20 17:20:07 -08:00
xattr.h
zlib.c btrfs: zero out left over bytes after processing compression streams 2014-11-30 09:33:51 -08:00