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[PATCH] taskstats_tgid_alloc: optimization

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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>
This commit is contained in:
Oleg Nesterov 2006-10-28 10:38:52 -07:00 committed by Linus Torvalds
parent 093a8e8aec
commit 17b02695b2
1 changed files with 3 additions and 0 deletions
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3
include/linux/taskstats_kern.h
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@ -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;