From: Christoph Lameter <cl@linux-foundation.org>
To: Mel Gorman <mel@csn.ul.ie>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kosaki.motohiro@jp.fujitsu.com" <kosaki.motohiro@jp.fujitsu.com>,
"balbir@linux.vnet.ibm.com" <balbir@linux.vnet.ibm.com>,
riel@redhat.com,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>
Subject: Re: [PATCH] fix vmscan to take care of nodemask
Date: Mon, 23 Mar 2009 09:38:38 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.1.10.0903230936130.4095@qirst.com> (raw)
In-Reply-To: <20090323114814.GB6484@csn.ul.ie>
On Mon, 23 Mar 2009, Mel Gorman wrote:
> try_to_free_pages() is used for the direct reclaim of up to
> SWAP_CLUSTER_MAX pages when watermarks are low. The caller to
> alloc_pages_nodemask() can specify a nodemask of nodes that are allowed
> to be used but this is not passed to try_to_free_pages(). This can lead
> to the unnecessary reclaim of pages that are unusable by the caller and
> in the worst case lead to allocation failure as progress was not been
> made where it is needed.
>
> This patch passes the nodemask used for alloc_pages_nodemask() to
> try_to_free_pages().
This is only useful for MPOL_BIND. Direct reclaim within a cpuset already
honors the boundaries of the cpuset.
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next prev parent reply other threads:[~2009-03-23 12:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-23 1:03 KAMEZAWA Hiroyuki
2009-03-23 1:13 ` KAMEZAWA Hiroyuki
2009-03-23 1:20 ` KOSAKI Motohiro
2009-03-23 11:48 ` Mel Gorman
2009-03-23 13:38 ` Christoph Lameter [this message]
2009-03-23 15:31 ` KOSAKI Motohiro
2009-03-23 15:39 ` Christoph Lameter
2009-03-24 1:31 ` KAMEZAWA Hiroyuki
2009-03-24 2:26 ` [PATCH] fix vmscan to take care of nodemask v3 KAMEZAWA Hiroyuki
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