microsoft
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WSL2-Linux-Kernel
зеркало из https://github.com/microsoft/WSL2-Linux-Kernel.git
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WSL2-Linux-Kernel/fs/btrfs
История
Wang Shilong f7f82b81d2 Btrfs: add a rb_tree to improve performance of ulist search 
Walking backref tree and btrfs quota rely on ulist very much.
This patch tries to use rb_tree to speed up search time.

The original code always checks whether an element
exists before adding a new element, however it costs O(n).

I try to add a rb_tree in the ulist,this is only used to speed up
search. I also do some measurements with quota enabled.

fsstress -p 4 -n 10000

Without this path:
real    0m51.058s       2m4.745s        1m28.222s       1m5.137s
user    0m0.035s        0m0.041s        0m0.105s        0m0.100s
sys     0m12.009s       0m11.246s       0m10.901s       0m10.999s       0m11.287s

With this path:
real    0m55.295s       0m50.960s       1m2.214s        0m48.273s
user    0m0.053s        0m0.095s        0m0.135s        0m0.107s
sys     0m7.766s        0m6.013s        0m6.319s        0m6.030s        0m6.532s

After applying the patch,the execute time is down by ~42%.(11.287s->6.532s)

Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
 		2013-05-06 15:54:44 -04:00
..
Kconfig btrfs: update kconfig title 2013-05-06 15:54:22 -04:00
Makefile Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
acl.c Btrfs: skip adding an acl attribute if we don't have to 2012-12-16 20:46:15 -05:00
async-thread.c Btrfs: call the ordered free operation without any locks held 2012-07-25 16:15:07 -04:00
async-thread.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
backref.c Btrfs: make __merge_refs() return type be void 2013-05-06 15:54:43 -04:00
backref.h Btrfs: move fs/btrfs/ioctl.h to include/uapi/linux/btrfs.h 2013-02-20 09:37:28 -05:00
btrfs_inode.h Btrfs: serialize unlocked dio reads with truncate 2013-02-20 12:59:47 -05:00
check-integrity.c btrfs: define BTRFS_MAGIC as a u64 value 2013-02-20 13:00:01 -05:00
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 Btrfs: cleanup unused arguments of btrfs_csum_data 2013-05-06 15:54:14 -04:00
compression.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
ctree.c Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
ctree.h Btrfs: introduce a mutex lock for btrfs quota operations 2013-05-06 15:54:38 -04:00
delayed-inode.c Btrfs: improve the delayed inode throttling 2013-03-07 07:52:40 -05:00
delayed-inode.h Btrfs: improve the delayed inode throttling 2013-03-07 07:52:40 -05:00
delayed-ref.c Btrfs: compare relevant parts of delayed tree refs 2013-05-06 15:54:29 -04:00
delayed-ref.h Merge branch 'raid56-experimental' into for-linus-3.9 2013-02-20 14:06:05 -05:00
dev-replace.c Btrfs: check the return value of btrfs_start_delalloc_inodes() 2013-02-20 09:37:21 -05:00
dev-replace.h Btrfs: add new sources for device replace code 2012-12-12 17:15:41 -05:00
dir-item.c Btrfs: fix hash overflow handling 2012-12-17 14:48:21 -05:00
disk-io.c Btrfs: introduce a mutex lock for btrfs quota operations 2013-05-06 15:54:38 -04:00
disk-io.h Btrfs: cleanup unused arguments of btrfs_csum_data 2013-05-06 15:54:14 -04:00
export.c fs: encode_fh: return FILEID_INVALID if invalid fid_type 2013-02-26 02:46:10 -05:00
export.h
…
extent-tree.c Btrfs: don't wait on ordered extents if we have a trans open 2013-05-06 15:54:32 -04:00
extent_io.c Btrfs: improve the performance of the csums lookup 2013-05-06 15:54:35 -04:00
extent_io.h Btrfs: improve the performance of the csums lookup 2013-05-06 15:54:35 -04:00
extent_map.c Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
extent_map.h Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
file-item.c Btrfs: improve the performance of the csums lookup 2013-05-06 15:54:35 -04:00
file.c Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
free-space-cache.c Btrfs: Include the device in most error printk()s 2013-05-06 15:54:23 -04:00
free-space-cache.h Btrfs: add some free space cache tests 2013-05-06 15:52:54 -04:00
hash.h btrfs: extended inode refs 2012-10-09 09:14:45 -04:00
inode-item.c btrfs: extended inode refs 2012-10-09 09:14:45 -04:00
inode-map.c Btrfs: improve the noflush reservation 2012-12-11 13:31:31 -05:00
inode-map.h Btrfs: Support reading/writing on disk free ino cache 2011-04-25 16:46:11 +08:00
inode.c btrfs: abort unlink trans in missed error case 2013-05-06 15:54:36 -04:00
ioctl.c Btrfs: use tree_root to avoid edquot when disabling quota 2013-05-06 15:54:41 -04:00
locking.c Btrfs: save us a read_lock 2013-02-20 09:37:17 -05:00
locking.h Btrfs: remove btrfs_try_spin_lock 2013-03-14 14:57:10 -04:00
lzo.c btrfs: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:21 +08:00
math.h Btrfs: cleanup duplicated division functions 2012-12-11 13:31:30 -05:00
ordered-data.c Btrfs: improve the performance of the csums lookup 2013-05-06 15:54:35 -04:00
ordered-data.h Btrfs: improve the performance of the csums lookup 2013-05-06 15:54:35 -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: Include the device in most error printk()s 2013-05-06 15:54:23 -04:00
print-tree.h
…
qgroup.c Btrfs: fix a warning when updating qgroup limit 2013-05-06 15:54:41 -04:00
raid56.c btrfs/raid56: Add missing #include <linux/vmalloc.h> 2013-03-03 06:53:41 -05:00
raid56.h Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
rcu-string.h Btrfs: use rcu to protect device->name 2012-06-14 21:29:16 -04:00
reada.c Btrfs: introduce GET_READ_MIRRORS functionality for btrfs_map_block() 2012-12-12 17:15:43 -05:00
relocation.c Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
root-tree.c Btrfs: rename root_times_lock to root_item_lock 2012-12-16 20:46:21 -05:00
scrub.c Btrfs: add a incompatible format change for smaller metadata extent refs 2013-05-06 15:54:18 -04:00
send.c Btrfs: allow omitting stream header and end-cmd for btrfs send 2013-05-06 15:54:44 -04:00
send.h btrfs: add "no file data" flag to btrfs send ioctl 2013-02-20 12:59:39 -05:00
struct-funcs.c Btrfs: rewrite BTRFS_SETGET_FUNCS 2012-07-23 16:28:06 -04:00
super.c Btrfs: fix infinite loop when we abort on mount 2013-05-06 15:54:29 -04:00
sysfs.c btrfs: fixup/remove module.h usage as required 2013-03-01 15:01:01 -05:00
transaction.c Btrfs: fix infinite loop when we abort on mount 2013-05-06 15:54:29 -04:00
transaction.h btrfs: clean snapshots one by one 2013-05-06 15:54:21 -04:00
tree-defrag.c btrfs: remove cache only arguments from defrag path 2013-02-20 12:59:36 -05:00
tree-log.c Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
tree-log.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
ulist.c Btrfs: add a rb_tree to improve performance of ulist search 2013-05-06 15:54:44 -04:00
ulist.h Btrfs: add a rb_tree to improve performance of ulist search 2013-05-06 15:54:44 -04:00
version.h
…
volumes.c btrfs: ignore device open failures in __btrfs_open_devices 2013-05-06 15:54:36 -04:00
volumes.h Merge branch 'raid56-experimental' into for-linus-3.9 2013-02-20 14:06:05 -05:00
xattr.c Btrfs: only log the inode item if we can get away with it 2012-12-16 20:46:21 -05:00
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: fix message printing 2012-10-09 09:19:57 -04:00