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Message-Id: <1176540125.5462.13.camel@dix> Date: Sat, 14 Apr 2007 10:42:05 +0200 From: Martin Peschke <mp3@...ibm.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org Subject: [Patch] statistics: fix sorted list The list of statistics entries maintained by type 'sparse' might have shown unsorted entries with regard to the number of reported hits. The reason was that new entries were always added at the tail of the list regardless of the number of hits they came with. Unsorted lists might suffer a performance loss. Fix is to sort the list by hits after entry insertion, i.e. moving entries added at the tail up the chain, which should not be required very often (usually just when merging per-cpu lists). Patch is against 2.6.21-rc6-mm1. Signed-off-by: Martin Peschke <mp3@...ibm.com> --- statistic.c | 1 + 1 file changed, 1 insertion(+) Index: linux/lib/statistic.c =================================================================== --- linux.orig/lib/statistic.c +++ linux/lib/statistic.c @@ -1113,6 +1113,7 @@ static int statistic_add_sparse_new(stru entry->hits = incr; slist->entries++; list_add_tail(&entry->list, &slist->entry_lh); + statistic_sort_sparse(&slist->entry_lh, entry); return 0; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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