Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2024-12-28 16:53:49 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

lockref: Relax in cmpxchg loop

Browse Source 
While we are likley to succeed and break out of this loop, it isn't
guaranteed.  We should be power and thread friendly if we do have to
go around for a second (or third, or more) attempt.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Luck, Tony 2013-09-03 14:49:49 -07:00 committed by Linus Torvalds
parent 2f01ea908b
commit d472d9d98b
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
lib/lockref.c
View File

@ -19,6 +19,7 @@
if (likely(old.lock_count == prev.lock_count)) { \
SUCCESS; \
} \
cpu_relax(); \
} \
} while (0)