From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [RFC PATCH 0/6] Do not call ->writepage[s] from direct reclaim
 and use a_ops->writepages() where possible
Date: Tue, 15 Jun 2010 10:11:22 -0400
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Cc: Mel Gorman <mel@csn.ul.ie>, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
	Dave Chinner <david@fromorbit.com>,
	Chris Mason <chris.mason@oracle.com>,
	Nick Piggin <npiggin@suse.de>, Rik van Riel <riel@redhat.com>
To: Andrea Arcangeli <aarcange@redhat.com>
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On Tue, Jun 15, 2010 at 04:00:11PM +0200, Andrea Arcangeli wrote:
> collecting clean cache doesn't still satisfy the allocation), during
> allocations in direct reclaim and increase the THREAD_SIZE than doing
> this purely for stack reasons as the VM will lose reliability if we

This basically means doubling the stack size, as you can splice together
two extremtly stack hungry codepathes in the worst case.  Do you really
want order 2 stack allocations?