Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755990Ab1FNKLM (ORCPT ); Tue, 14 Jun 2011 06:11:12 -0400 Received: from zene.cmpxchg.org ([85.214.230.12]:50576 "EHLO zene.cmpxchg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755916Ab1FNKLJ (ORCPT ); Tue, 14 Jun 2011 06:11:09 -0400 Date: Tue, 14 Jun 2011 12:10:47 +0200 From: Johannes Weiner To: Andrew Lutomirski Cc: Minchan Kim , mgorman@suse.de, KOSAKI Motohiro , aarcange@redhat.com, kamezawa.hiroyu@jp.fujitsu.com, fengguang.wu@intel.com, andi@firstfloor.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, riel@redhat.com Subject: Re: Easy portable testcase! (Re: Kernel falls apart under light memory pressure (i.e. linking vmlinux)) Message-ID: <20110614101047.GG6371@cmpxchg.org> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1414 Lines: 33 On Sun, May 29, 2011 at 08:28:46PM -0400, Andrew Lutomirski wrote: > On Sun, May 29, 2011 at 2:28 PM, Minchan Kim wrote: > >> > >> It works only if the zone meets high watermark. If allocation is > >> faster than reclaim(ie, it's true for slow swap device), the zone > >> would remain congested. > >> It means swapout would block. > >> As we see the OOM log, we can know that DMA32 zone can't meet high watermark. > >> > >> Does my guessing make sense? > > > > Hi Andrew. > > I got failed your scenario in my machine so could you be willing to > > test this patch for proving my above scenario? > > The patch is just revert patch of 0e093d99[do not sleep on the > > congestion queue...] for 2.6.38.6. > > I would like to test it for proving my above zone congestion scenario. > > > > I did it based on 2.6.38.6 for your easy apply so you must apply it > > cleanly on vanilla v2.6.38.6. > > And you have to add !pgdat_balanced and shrink_slab patch. > > No, because my laptop just decided that it doesn't like to turn on. :( > > I'll test it on my VM on Tuesday and (fingers crossed) on my repaired > laptop next weekend. Any updates on this? -- 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/