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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2006-10-28 19:38:52 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-28 20:30:54 +0200 |
| commit | 17b02695b254aa2ef0e53df9c8e6548f86e66a9d (patch) | |
| tree | 6d39c830549641e3b73ad8881f0aecbd1d680ee6 | |
| parent | [PATCH] taskstats_tgid_free: fix usage (diff) | |
| download | linux-17b02695b254aa2ef0e53df9c8e6548f86e66a9d.tar.xz linux-17b02695b254aa2ef0e53df9c8e6548f86e66a9d.zip | |
[PATCH] taskstats_tgid_alloc: optimization
Every subthread (except first) does unneeded kmem_cache_alloc/kmem_cache_free.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Jay Lan <jlan@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/linux/taskstats_kern.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/taskstats_kern.h b/include/linux/taskstats_kern.h index a437ca0d226b..664224008fb2 100644 --- a/include/linux/taskstats_kern.h +++ b/include/linux/taskstats_kern.h @@ -32,6 +32,9 @@ static inline void taskstats_tgid_alloc(struct signal_struct *sig) struct taskstats *stats; unsigned long flags; + if (sig->stats != NULL) + return; + stats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL); if (!stats) return; |