Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757864Ab0FOOLa (ORCPT ); Tue, 15 Jun 2010 10:11:30 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:57336 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757829Ab0FOOL3 (ORCPT ); Tue, 15 Jun 2010 10:11:29 -0400 Date: Tue, 15 Jun 2010 10:11:22 -0400 From: Christoph Hellwig To: Andrea Arcangeli Cc: Mel Gorman , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Dave Chinner , Chris Mason , Nick Piggin , Rik van Riel Subject: Re: [RFC PATCH 0/6] Do not call ->writepage[s] from direct reclaim and use a_ops->writepages() where possible Message-ID: <20100615141122.GA27893@infradead.org> References: <1275987745-21708-1-git-send-email-mel@csn.ul.ie> <20100615140011.GD28052@random.random> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100615140011.GD28052@random.random> User-Agent: Mutt/1.5.20 (2009-08-17) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 703 Lines: 14 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? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/