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0e0adbcfdc
kernel_optimize_test/fs/btrfs
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Josef Bacik 0e0adbcfdc btrfs: track refs in a rb_tree instead of a list 
If we get a significant amount of delayed refs for a single block (think
modifying multiple snapshots) we can end up spending an ungodly amount
of time looping through all of the entries trying to see if they can be
merged.  This is because we only add them to a list, so we have O(2n)
for every ref head.  This doesn't make any sense as we likely have refs
for different roots, and so they cannot be merged.  Tracking in a tree
will allow us to break as soon as we hit an entry that doesn't match,
making our worst case O(n).

With this we can also merge entries more easily.  Before we had to hope
that matching refs were on the ends of our list, but with the tree we
can search down to exact matches and merge them at insert time.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2017-11-01 20:45:35 +01:00
..
tests Btrfs: rework outstanding_extents 2017-11-01 20:45:35 +01:00
acl.c btrfs: preserve i_mode if __btrfs_set_acl() fails 2017-08-21 17:47:42 +02:00
async-thread.c Btrfs: fix confusing worker helper info in stacktrace 2017-10-30 12:27:57 +01:00
async-thread.h btrfs: constify tracepoint arguments 2017-08-16 14:19:53 +02:00
backref.c btrfs: track refs in a rb_tree instead of a list 2017-11-01 20:45:35 +01:00
backref.h btrfs: add a flag to iterate_inodes_from_logical to find all extent refs for uncompressed extents 2017-11-01 20:45:34 +01:00
btrfs_inode.h btrfs: make the delalloc block rsv per inode 2017-11-01 20:45:35 +01:00
check-integrity.c btrfs: Use bd_dev to generate index when dev_state_hashtable add items. 2017-10-30 12:28:01 +01:00
check-integrity.h
compression.c btrfs: allow setting zlib compression level via :9 2017-11-01 20:45:34 +01:00
compression.h btrfs: allow to set compression level for zlib 2017-11-01 20:45:29 +01:00
ctree.c btrfs: pass root to various extent ref mod functions 2017-10-30 12:28:00 +01:00
ctree.h btrfs: make the delalloc block rsv per inode 2017-11-01 20:45:35 +01:00
dedupe.h
delayed-inode.c btrfs: make the delalloc block rsv per inode 2017-11-01 20:45:35 +01:00
delayed-inode.h btrfs: convert btrfs_delayed_item.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
delayed-ref.c btrfs: track refs in a rb_tree instead of a list 2017-11-01 20:45:35 +01:00
delayed-ref.h btrfs: track refs in a rb_tree instead of a list 2017-11-01 20:45:35 +01:00
dev-replace.c Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 18:54:01 -07:00
dev-replace.h
dir-item.c btrfs: fix validation of XATTR_ITEM dir items 2017-06-29 20:06:11 +02:00
disk-io.c btrfs: track refs in a rb_tree instead of a list 2017-11-01 20:45:35 +01:00
disk-io.h btrfs: use named constant for bdev blocksize 2017-08-16 16:12:04 +02:00
export.c btrfs: Check name_len before reading btrfs_get_name 2017-06-21 19:16:04 +02:00
export.h
extent_io.c btrfs: get rid of sector_t and use u64 offset in submit_extent_page 2017-10-30 12:28:00 +01:00
extent_io.h Btrfs: remove bio_flags which indicates a meta block of log-tree 2017-10-30 12:27:56 +01:00
extent_map.c btrfs: convert extent_map.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
extent_map.h btrfs: convert extent_map.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
extent-tree.c btrfs: track refs in a rb_tree instead of a list 2017-11-01 20:45:35 +01:00
file-item.c Merge branch 'for-4.13-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux 2017-07-05 16:41:23 -07:00
file.c Btrfs: rework outstanding_extents 2017-11-01 20:45:35 +01:00
free-space-cache.c btrfs: drop newlines from strings when using btrfs_* helpers 2017-08-16 16:12:02 +02:00
free-space-cache.h
free-space-tree.c btrfs: Clean up unused variables in free-space-tree.c 2017-10-30 12:27:59 +01:00
free-space-tree.h btrfs: expose internal free space tree routine only if sanity tests are enabled 2017-08-18 16:36:29 +02:00
hash.c crypto: Work around deallocated stack frame reference gcc bug on sparc. 2017-06-08 17:36:03 +08:00
hash.h
inode-item.c
inode-map.c Btrfs: rework outstanding_extents 2017-11-01 20:45:35 +01:00
inode-map.h
inode.c btrfs: make the delalloc block rsv per inode 2017-11-01 20:45:35 +01:00
ioctl.c Btrfs: rework outstanding_extents 2017-11-01 20:45:35 +01:00
Kconfig Btrfs: add a extent ref verify tool 2017-10-30 12:28:00 +01:00
locking.c
locking.h
lzo.c btrfs: allow to set compression level for zlib 2017-11-01 20:45:29 +01:00
Makefile Btrfs: add a extent ref verify tool 2017-10-30 12:28:00 +01:00
math.h
ordered-data.c Btrfs: rework outstanding_extents 2017-11-01 20:45:35 +01:00
ordered-data.h btrfs: fix integer overflow in calc_reclaim_items_nr 2017-06-29 20:17:02 +02:00
orphan.c
print-tree.c Btrfs: add one more sanity check for shared ref type 2017-08-21 17:47:43 +02:00
print-tree.h btrfs: get fs_info from eb in btrfs_print_tree, remove argument 2017-08-16 16:12:03 +02:00
props.c Merge branch 'zstd-minimal' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2017-09-14 17:30:49 -07:00
props.h
qgroup.c btrfs: add a flag to iterate_inodes_from_logical to find all extent refs for uncompressed extents 2017-11-01 20:45:34 +01:00
qgroup.h btrfs: qgroup: Fix qgroup reserved space underflow by only freeing reserved ranges 2017-06-29 20:17:02 +02:00
raid56.c Btrfs: fix memory leak in raid56 2017-10-30 12:27:57 +01:00
raid56.h
rcu-string.h
reada.c btrfs: remove unused member err from reada_extent 2017-06-19 18:25:59 +02:00
ref-verify.c Btrfs: add a extent ref verify tool 2017-10-30 12:28:00 +01:00
ref-verify.h Btrfs: add a extent ref verify tool 2017-10-30 12:28:00 +01:00
relocation.c Btrfs: rework outstanding_extents 2017-11-01 20:45:35 +01:00
root-tree.c btrfs: Clean up dead code in root-tree 2017-10-30 12:27:56 +01:00
scrub.c btrfs: add a flag to iterate_inodes_from_logical to find all extent refs for uncompressed extents 2017-11-01 20:45:34 +01:00
send.c btrfs: add a flag to iterate_inodes_from_logical to find all extent refs for uncompressed extents 2017-11-01 20:45:34 +01:00
send.h btrfs: fix send ioctl on 32bit with 64bit kernel 2017-10-30 12:27:59 +01:00
struct-funcs.c btrfs: struct-funcs, constify readers 2017-08-16 14:19:53 +02:00
super.c btrfs: allow setting zlib compression level via :9 2017-11-01 20:45:34 +01:00
sysfs.c btrfs: prefix sysfs attribute struct names 2017-10-30 12:27:58 +01:00
sysfs.h btrfs: prefix sysfs attribute struct names 2017-10-30 12:27:58 +01:00
transaction.c Btrfs: only check delayed ref usage in should_end_transaction 2017-10-30 12:28:00 +01:00
transaction.h btrfs: remove unused qgroup members from btrfs_trans_handle 2017-04-18 14:07:25 +02:00
tree-checker.c btrfs: tree-checker: use %zu format string for size_t 2017-10-30 12:27:59 +01:00
tree-checker.h btrfs: Move leaf and node validation checker to tree-checker.c 2017-10-30 12:27:58 +01:00
tree-defrag.c
tree-log.c btrfs: pass root to various extent ref mod functions 2017-10-30 12:28:00 +01:00
tree-log.h
ulist.c
ulist.h
uuid-tree.c
volumes.c btrfs: remove BUG_ON in btrfs_rm_dev_replace_free_srcdev() 2017-11-01 20:45:34 +01:00
volumes.h btrfs: declare btrfs_report_missing_device() static 2017-10-30 12:27:59 +01:00
xattr.c btrfs: Check name_len with boundary in verify dir_item 2017-06-21 19:16:04 +02:00
xattr.h
zlib.c btrfs: allow to set compression level for zlib 2017-11-01 20:45:29 +01:00
zstd.c btrfs: allow to set compression level for zlib 2017-11-01 20:45:29 +01:00