From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id 645456B004A for ; Tue, 14 Jun 2011 06:11:08 -0400 (EDT) Date: Tue, 14 Jun 2011 12:10:47 +0200 From: Johannes Weiner 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: owner-linux-mm@kvack.org List-ID: 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 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org