Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752010Ab1E3A3I (ORCPT ); Sun, 29 May 2011 20:29:08 -0400 Received: from mail-pw0-f46.google.com ([209.85.160.46]:51591 "EHLO mail-pw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751330Ab1E3A3H (ORCPT ); Sun, 29 May 2011 20:29:07 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:cc:content-type; b=jPoTlarGgMGbPW+vX1mvrhuh+svRkmhGaBKHF4SBFx79cKCE4fteBOtuEj3iMp4kLe uddEmkQniPjhvn+3hZhR7dNSBEGFKmtYl9s6tlcEmXuRkxDLAY0VfvBCLwKzkmaLGbPR jgyKkQ6MvFFrj7N7OJmRj3cy8Ajgm0CQAVpew= MIME-Version: 1.0 In-Reply-To: References: From: Andrew Lutomirski Date: Sun, 29 May 2011 20:28:46 -0400 X-Google-Sender-Auth: 3kEtenRV7EhPU0uSv8u5XHy-0FI Message-ID: Subject: Re: Easy portable testcase! (Re: Kernel falls apart under light memory pressure (i.e. linking vmlinux)) To: Minchan Kim Cc: 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, hannes@cmpxchg.org, riel@redhat.com Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1283 Lines: 32 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. --Andy -- 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/