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[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 <rohit.seth@intel.com>
Cc: <linux-mm@kvack.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Seth, Rohit 2005-10-29 18:15:48 -07:00 committed by Linus Torvalds
parent ba56e91c94
commit e46a5e28c2
1 changed files with 2 additions and 2 deletions
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4
mm/page_alloc.c
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@ -1755,7 +1755,7 @@ inline void setup_pageset(struct per_cpu_pageset *p, unsigned long batch)
pcp = &p->pcp[0]; /* hot */ pcp = &p->pcp[0]; /* hot */
pcp->count = 0; pcp->count = 0;
pcp->low = 2 * batch; pcp->low = 0;
pcp->high = 6 * batch; pcp->high = 6 * batch;
pcp->batch = max(1UL, 1 * batch); pcp->batch = max(1UL, 1 * batch);
INIT_LIST_HEAD(&pcp->list); 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->count = 0;
pcp->low = 0; pcp->low = 0;
pcp->high = 2 * batch; pcp->high = 2 * batch;
pcp->batch = max(1UL, 1 * batch); pcp->batch = max(1UL, batch/2);
INIT_LIST_HEAD(&pcp->list); INIT_LIST_HEAD(&pcp->list);
} }