From: "Seth, Rohit" <rohit.seth@intel.com>
To: akpm@osdl.org
Cc: "Seth, Rohit" <rohit.seth@intel.com>,
linux-mm@kvack.org, Mattia Dongili <malattia@linux.it>,
linux-kernel@vger.kernel.org
Subject: [patch] Reset the high water marks in CPUs pcp list
Date: Wed, 28 Sep 2005 10:50:09 -0700 [thread overview]
Message-ID: <20050928105009.B29282@unix-os.sc.intel.com> (raw)
Recent changes in page allocations for pcps has increased the high watermark for these lists. This has resulted in scenarios where pcp lists could be having bigger number of free pages even under low memory conditions.
[PATCH]: Reduce the high mark in cpu's pcp lists.
Signed-off-by: Rohit Seth <rohit.seth@intel.com>
--- linux-2.6.14-rc2-mm1.org/mm/page_alloc.c 2005-09-27 10:03:51.000000000 -0700
+++ linux-2.6.14-rc2-mm1/mm/page_alloc.c 2005-09-27 18:01:21.000000000 -0700
@@ -1859,15 +1859,15 @@
pcp = &p->pcp[0]; /* hot */
pcp->count = 0;
pcp->low = 0;
- pcp->high = 6 * batch;
+ pcp->high = 4 * batch;
pcp->batch = max(1UL, 1 * batch);
INIT_LIST_HEAD(&pcp->list);
pcp = &p->pcp[1]; /* cold*/
pcp->count = 0;
pcp->low = 0;
- pcp->high = 2 * batch;
pcp->batch = max(1UL, batch/2);
+ pcp->high = pcp->batch + 1;
INIT_LIST_HEAD(&pcp->list);
}
next reply other threads:[~2005-09-28 17:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-28 17:50 Seth, Rohit [this message]
2005-09-28 20:01 ` [patch] Reset the high water marks in CPUs pcp list Christoph Lameter
2005-09-28 20:26 ` Rohit Seth
2005-09-28 21:09 ` Christoph Lameter
2005-09-28 21:32 ` Rohit Seth
2005-09-28 21:56 ` Christoph Lameter
2005-09-29 1:12 ` Rohit Seth
2005-09-29 6:49 ` Nick Piggin
2005-09-29 16:34 ` Rohit Seth
2005-09-28 21:18 ` Martin J. Bligh
2005-09-28 21:55 ` Christoph Lameter
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