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Message-ID: <20100719142051.GC12510@infradead.org> Date: Mon, 19 Jul 2010 10:20:51 -0400 From: Christoph Hellwig <hch@...radead.org> To: Mel Gorman <mel@....ul.ie> Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, Dave Chinner <david@...morbit.com>, Chris Mason <chris.mason@...cle.com>, Nick Piggin <npiggin@...e.de>, Rik van Riel <riel@...hat.com>, Johannes Weiner <hannes@...xchg.org>, Christoph Hellwig <hch@...radead.org>, Wu Fengguang <fengguang.wu@...el.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Andrew Morton <akpm@...ux-foundation.org>, Andrea Arcangeli <aarcange@...hat.com> Subject: Re: [PATCH 6/8] fs,xfs: Allow kswapd to writeback pages On Mon, Jul 19, 2010 at 02:11:28PM +0100, Mel Gorman wrote: > As only kswapd and memcg are writing back pages, there should be no > danger of overflowing the stack. Allow the writing back of dirty pages > in xfs from the VM. As pointed out during the discussion on one of your previous post memcg does pose a huge risk of stack overflows. In the XFS tree we've already relaxed the check to allow writeback from kswapd, and until the memcg situation we'll need to keep that check. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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