Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933657AbXHFTPe (ORCPT ); Mon, 6 Aug 2007 15:15:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760508AbXHFTP0 (ORCPT ); Mon, 6 Aug 2007 15:15:26 -0400 Received: from dsl081-085-152.lax1.dsl.speakeasy.net ([64.81.85.152]:60466 "EHLO moonbase.phunq.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1758100AbXHFTPZ (ORCPT ); Mon, 6 Aug 2007 15:15:25 -0400 From: Daniel Phillips To: Christoph Lameter Subject: Re: [PATCH 02/10] mm: system wide ALLOC_NO_WATERMARK Date: Mon, 6 Aug 2007 12:15:16 -0700 User-Agent: KMail/1.9.5 Cc: Peter Zijlstra , linux-kernel@vger.kernel.org, linux-mm@kvack.org, David Miller , Andrew Morton , Daniel Phillips , Pekka Enberg , Matt Mackall , Lee Schermerhorn , Steve Dickson References: <20070806102922.907530000@chello.nl> <200708061148.43870.phillips@phunq.net> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200708061215.16427.phillips@phunq.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1112 Lines: 28 On Monday 06 August 2007 11:51, Christoph Lameter wrote: > On Mon, 6 Aug 2007, Daniel Phillips wrote: > > On Monday 06 August 2007 11:42, Christoph Lameter wrote: > > > On Mon, 6 Aug 2007, Daniel Phillips wrote: > > > > Currently your system likely would have died here, so ending up > > > > with a reserve page temporarily on the wrong node is already an > > > > improvement. > > > > > > The system would have died? Why? > > > > Because a block device may have deadlocked here, leaving the system > > unable to clean dirty memory, or unable to load executables over > > the network for example. > > So this is a locking problem that has not been taken care of? A deadlock problem that we used to call memory recursion deadlock, aka: somebody in the vm writeout path needs to allocate memory, but there is no memory, so vm writeout stops forever. Regards, Daniel - 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/