Messages in this thread Patch in this message | | | From | Magnus Damm <> | Subject | [PATCH] NUMA: broken per cpu pageset counters | Date | Tue, 25 Oct 2005 20:17:42 +0900 (JST) |
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The NUMA counters in struct per_cpu_pageset (linux/mmzone.h) are never cleared today. This works ok for CPU 0 on NUMA machines because boot_pageset[] is already zero, but for other CPU:s this results in uninitialized counters.
Signed-off-by: Magnus Damm <magnus@valinux.co.jp> ---
Tested on dual x86_64 hardware with 2.6.14-rc5-git5.
/proc/zoneinfo: .... numa_hit: 15064664480448666958 numa_miss: 15061573751478353360 numa_foreign: 15082960697523852788 interleave_hit: 15083101074612482007 local_node: 15084090651888212814 other_node: 5860683432910092144 ....
--- linux-2.6.14-rc5-git5/mm/page_alloc.c 2005-10-24 15:37:48.000000000 +0900 +++ linux-2.6.14-rc5-git5-setup_pageset_zero_fix/mm/page_alloc.c 2005-10-25 19:48:06.000000000 +0900 @@ -1750,6 +1750,8 @@ inline void setup_pageset(struct per_cpu { struct per_cpu_pages *pcp; + memset(p, 0, sizeof(*p)); + pcp = &p->pcp[0]; /* hot */ pcp->count = 0; pcp->low = 2 * batch; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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