From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: kosaki.motohiro@jp.fujitsu.com,
Andrew Morton <akpm@linux-foundation.org>,
Rik van Riel <riel@redhat.com>,
Christoph Lameter <cl@linux-foundation.org>,
Wu Fengguang <fengguang.wu@intel.com>,
linuxram@us.ibm.com, linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] mm: Fix documentation of min_unmapped_ratio
Date: Tue, 16 Jun 2009 18:41:16 +0900 (JST) [thread overview]
Message-ID: <20090616184100.99AC.A69D9226@jp.fujitsu.com> (raw)
In-Reply-To: <1245064482-19245-3-git-send-email-mel@csn.ul.ie>
> -A percentage of the total pages in each zone. Zone reclaim will only
> -occur if more than this percentage of pages are file backed and unmapped.
> -This is to insure that a minimal amount of local pages is still available for
> -file I/O even if the node is overallocated.
> +This is a percentage of the total pages in each zone. Zone reclaim will
> +only occur if more than this percentage of pages are in a state that
> +zone_reclaim_mode allows to be reclaimed.
> +
> +If zone_reclaim_mode has the value 4 OR'd, then the percentage is compared
> +against all file-backed unmapped pages including swapcache pages and tmpfs
> +files. Otherwise, only unmapped pages backed by normal files but not tmpfs
> +files and similar are considered.
>
> The default is 1 percent.
looks good.
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prev parent reply other threads:[~2009-06-16 9:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-15 11:14 [PATCH 0/2] Two fixes for patch vmscan-properly-account-for-the-number-of-page-cache-pages-zone_reclaim-can-reclaim.patch Mel Gorman
2009-06-15 11:14 ` [PATCH 1/2] vmscan: Fix use of delta in zone_pagecache_reclaimable() Mel Gorman
2009-06-16 9:41 ` KOSAKI Motohiro
2009-06-15 11:14 ` [PATCH 2/2] mm: Fix documentation of min_unmapped_ratio Mel Gorman
2009-06-16 9:41 ` KOSAKI Motohiro [this message]
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