Commit 17b02695 authored Oct 28, 2006 by Oleg Nesterov Committed by Linus Torvalds Oct 28, 2006

[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>

parent 093a8e8a

include/linux/taskstats_kern.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;

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