diff options
| author | Hua Zhong <hzhong@gmail.com> | 2006-06-23 02:05:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-23 07:43:06 -0700 |
| commit | 368a5fa1f28589e6b54588a139ea872d5b4b1914 (patch) | |
| tree | 346923893f4814dffb51049f92f81c327374e60c /include/linux/kernel.h | |
| parent | 0216bfcffe424a5473daa4da47440881b36c1f41 (diff) | |
| download | lwn-368a5fa1f28589e6b54588a139ea872d5b4b1914.tar.gz lwn-368a5fa1f28589e6b54588a139ea872d5b4b1914.zip | |
[PATCH] remove unlikely() in might_sleep_if()
The likely() profiling tools show that __alloc_page() causes a lot of misses:
! 132 119193 __alloc_pages():mm/page_alloc.c@937
Because most __alloc_page() calls are not atomic.
Signed-off-by: Hua Zhong <hzhong@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 25fccd859fbf..8c21aaa248b4 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -78,7 +78,7 @@ extern int cond_resched(void); # define might_sleep() do { might_resched(); } while (0) #endif -#define might_sleep_if(cond) do { if (unlikely(cond)) might_sleep(); } while (0) +#define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0) #define abs(x) ({ \ int __x = (x); \ |