From: Seth, Rohit Date: Sun, 30 Oct 2005 01:15:48 +0000 (-0700) Subject: [PATCH] mm: set per-cpu-pages lower threshold to zero X-Git-Tag: v2.6.15-rc1~730^2^2~80 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e46a5e28c201f703c18b47b108bfddec44f897c4;p=linux-2.6 [PATCH] mm: set per-cpu-pages lower threshold to zero Set the low water mark for hot pages in pcp to zero. (akpm: for the life of me I cannot remember why we created pcp->low. Neither can Martin and the changelog is silent. Maybe it was just a brainfart, but I have this feeling that there was a reason. If not, we should remove the fields completely. We'll see.) Signed-off-by: Rohit Seth Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/page_alloc.c b/mm/page_alloc.c index f799217dc2..60663232fb 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1755,7 +1755,7 @@ inline void setup_pageset(struct per_cpu_pageset *p, unsigned long batch) pcp = &p->pcp[0]; /* hot */ pcp->count = 0; - pcp->low = 2 * batch; + pcp->low = 0; pcp->high = 6 * batch; pcp->batch = max(1UL, 1 * batch); INIT_LIST_HEAD(&pcp->list); @@ -1764,7 +1764,7 @@ inline void setup_pageset(struct per_cpu_pageset *p, unsigned long batch) pcp->count = 0; pcp->low = 0; pcp->high = 2 * batch; - pcp->batch = max(1UL, 1 * batch); + pcp->batch = max(1UL, batch/2); INIT_LIST_HEAD(&pcp->list); }