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Date: Tue, 20 Sep 2011 11:21:15 -0400
From: Rik van Riel <riel@redhat.com>
MIME-Version: 1.0
Subject: Re: [patch 1/4] mm: exclude reserved pages from dirtyable memory
References: <1316526315-16801-1-git-send-email-jweiner@redhat.com>
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To: Johannes Weiner <jweiner@redhat.com>
Cc: linux-ext4@vger.kernel.org, Jan Kara <jack@suse.cz>, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, xfs@oss.sgi.com, Christoph Hellwig <hch@infradead.org>, linux-mm@kvack.org, Andreas Dilger <adilger.kernel@dilger.ca>, Mel Gorman <mgorman@suse.de>, linux-fsdevel@vger.kernel.org, Theodore Ts'o <tytso@mit.edu>, Andrew Morton <akpm@linux-foundation.org>, Wu Fengguang <fengguang.wu@intel.com>, Chris Mason <chris.mason@oracle.com>, Minchan Kim <minchan.kim@gmail.com>

On 09/20/2011 09:45 AM, Johannes Weiner wrote:
> The amount of dirtyable pages should not include the total number of
> free pages: there is a number of reserved pages that the page
> allocator and kswapd always try to keep free.
>
> The closer (reclaimable pages - dirty pages) is to the number of
> reserved pages, the more likely it becomes for reclaim to run into
> dirty pages:

> Signed-off-by: Johannes Weiner<jweiner@redhat.com>

Reviewed-by: Rik van Riel <riel@redhat.com>

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