Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-24 05:02:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

Btrfs: stop spinning on mutex_trylock and let the adaptive code spin for us

Browse Source 
Mutexes now spin internally and the btrfs spin is no longer required for
performance.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Chris Mason 2009-01-14 13:40:46 -05:00 committed by Ingo Molnar
parent ac6e60ee40
commit cf47b8f3d9
1 changed files with 0 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
fs/btrfs/locking.c
View File

@ -37,16 +37,6 @@
int btrfs_tree_lock(struct extent_buffer *eb)
{
int i;
if (mutex_trylock(&eb->mutex))
return 0;
for (i = 0; i < 512; i++) {
cpu_relax();
if (mutex_trylock(&eb->mutex))
return 0;
}
cpu_relax();
mutex_lock_nested(&eb->mutex, BTRFS_MAX_LEVEL - btrfs_header_level(eb));
return 0;
}