Return-Path: <linux-kernel-owner+w=401wt.eu-S1755833AbZGJNSV@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1755833AbZGJNSV (ORCPT <rfc822;w@1wt.eu>);
	Fri, 10 Jul 2009 09:18:21 -0400
Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754899AbZGJNSJ
	(ORCPT <rfc822;linux-kernel-outgoing>);
	Fri, 10 Jul 2009 09:18:09 -0400
Received: from rv-out-0506.google.com ([209.85.198.233]:54218 "EHLO
	rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1751846AbZGJNSI (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Fri, 10 Jul 2009 09:18:08 -0400
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=date:from:to:cc:subject:message-id:references:mime-version
         :content-type:content-disposition:in-reply-to:user-agent;
        b=KXj0Ivn7Z1zXESf5IK95e/sg/b/Ahpoq1HYFGxhEQhHukwOcJ22THaV3HWGbqciFBH
         6KpepiYNtETDJ7Da+l1Kv6wyNG66nMTMWANwC8clOpmaJwnwyS5OapEa21u6GUyQoMx6
         xKs5g7sMJKWWsGr6EZOpoNWehvfEsMCLQfvwY=
Date: Fri, 10 Jul 2009 21:18:01 +0800
From: Wu Fengguang <fengguang.wu@gmail.com>
To: John Stoffel <john@stoffel.org>
Cc: Gene Heskett <gene.heskett@verizon.net>,
       Linux Kernel list <linux-kernel@vger.kernel.org>,
       "linux-mm@kvack.org" <linux-mm@kvack.org>,
       Minchan Kim <minchan.kim@gmail.com>, "Rafael J. Wysocki" <rjw@sisk.pl>,
       Kernel Testers List <kernel-testers@vger.kernel.org>,
       David Howells <dhowells@redhat.com>,
       KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: OOM killer in 2.6.31-rc2
Message-ID: <20090710131801.GA17773@localhost>
References: <200907061056.00229.gene.heskett@verizon.net> <200907091042.38022.gene.heskett@verizon.net> <19030.22024.132029.196682@stoffel.org> <200907091703.06691.gene.heskett@verizon.net> <19031.15772.404288.544946@stoffel.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <19031.15772.404288.544946@stoffel.org>
User-Agent: Mutt/1.5.18 (2008-05-17)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 2957
Lines: 70

On Fri, Jul 10, 2009 at 09:09:48AM -0400, John Stoffel wrote:
> >>>>> "Gene" == Gene Heskett <gene.heskett@verizon.net> writes:
> 
> Gene> On Thursday 09 July 2009, John Stoffel wrote:
> >>>>>>> "Gene" == Gene Heskett <gene.heskett@verizon.net> writes:
> >> 
> Gene> On Wednesday 08 July 2009, Wu Fengguang wrote:
> >>>> On Wed, Jul 08, 2009 at 01:15:15PM +0800, Wu Fengguang wrote:
> >>>>> On Tue, Jul 07, 2009 at 11:42:07PM -0400, Gene Heskett wrote:
> >> 
> Gene> [...]
> >> 
> >>>>> I guess your near 800MB slab cache is somehow under scanned.
> >>>> 
> >>>> Gene, can you run .31 with this patch? When OOM happens, it will tell
> >>>> us whether the majority slab pages are reclaimable. Another way to
> >>>> find things out is to run `slabtop` when your system is moderately
> >>>> loaded.
> >> 
> Gene> Its been running continuously, and after 24 hours is now showing:
> >> 
> >> Just wondering, is this your M2N-SLI Deluxe board?
> Gene> Yes.
> >> I've got the same
> >> board, with 4Gb of RAM and I haven't noticed any loss of RAM from my
> >> looking (quickly) at top output.
> 
> Gene> I am short approximately 500 megs according to top:
> Gene> Mem:   3634228k total,  3522984k used,   111244k free,   308096k buffers
> Gene> Swap:  8385912k total,      568k used,  8385344k free,  2544716k cached
> 
> Gene> From dmesg:
> Gene> [    0.000000] TOM2: 0000000120000000 aka 4608M  <what is this?
> Gene> [...]
> Gene> [    0.000000] 2694MB HIGHMEM available.
> Gene> [    0.000000] 887MB LOWMEM available.
> 
> Gene> The bios signon does say 4092M IIRC.
> 
> >> But I also haven't bothered to upgrade the BIOS on this board at all
> >> since I got it back in March of 2008.  No need in my book so far.
> 
> Gene> I had been running the original bios, #1502, because 1604 and
> Gene> 1701 had very poor uptimes.  1502 caused an oops about 15 lines
> Gene> into the boot but that triggered a remap and it was bulletproof
> Gene> after that running a 32 bit 64G+PAE kernel.  (I haven't quite
> Gene> made the jump to a 64 bit install, yet...)
> 
> Why haven't you made the laep to 64bit yet?  To me, that seems to be
> the real solution here, not hacks like the HIGHMEM4G and HIGHMEM64G,
> esp when your hardware is 64Bit by default.  

Sure 64bit kernel would be the best option for Gene :)

> I've made the leap and I've never looked back.  Haven't missed any
> 32bit only apps, and if I really needed them, I'd just load the 32bit
> libraries if need be.

But for now I'd appreciate a lot if Gene can run a HIGHMEM64G kernel
with the provided patch, so as to collect one full OOM message for us
to analyze :) The previous OOM message missed the most important data
from zone Normal..

Thanks,
Fengguang
--
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/