Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753732Ab0HRTcK (ORCPT ); Wed, 18 Aug 2010 15:32:10 -0400 Received: from smtp104.prem.mail.ac4.yahoo.com ([76.13.13.43]:29128 "HELO smtp104.prem.mail.ac4.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752570Ab0HRTcH (ORCPT ); Wed, 18 Aug 2010 15:32:07 -0400 X-Yahoo-SMTP: _Dag8S.swBC1p4FJKLCXbs8NQzyse1SYSgnAbY0- X-YMail-OSG: DnNc6OEVM1mTXOa5pZCoJ9sMWBtVHdRtskrcoEIwSW8nhw5 sXIBF_Vp7neetMU82VZ85p2S.RANMJ7C4jLGED4pCkaiWgdFaZGLLCLTZ_YX _5llL8w9NbBTAi1w1_pCa5pRvrtKmj4WxV2L2Hc9W1nFdXnOIW7NiTh8gOsq CIL5KOble7EjdrWoDqj8G424cYC91_RdJctnLlaGinLYjbTsOV7fnk50A9br OwzmIJLzgh7OgEVVqwYt19uFcMeGt X-Yahoo-Newman-Property: ymail-3 Date: Wed, 18 Aug 2010 14:32:01 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@router.home To: David Rientjes cc: Pekka Enberg , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Nick Piggin Subject: Re: [S+Q3 20/23] slub: Shared cache to exploit cross cpu caching abilities. In-Reply-To: Message-ID: References: <20100804024514.139976032@linux.com> <20100804024535.338543724@linux.com> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1804 Lines: 33 On Tue, 17 Aug 2010, Christoph Lameter wrote: > > > > > > > [ 15.752467] > > > > [ 15.752467] INFO: 0xffff880c7e5f3ec0-0xffff880c7e5f3ec7. First byte 0x30 instead of 0xbb > > > > [ 15.752467] INFO: Allocated in 0xffff88087e4f11e0 age=131909211166235 cpu=2119111312 pid=-30712 > > > > [ 15.752467] INFO: Freed in 0xffff88087e4f13f0 age=131909211165707 cpu=2119111840 pid=-30712 > > > > [ 15.752467] INFO: Slab 0xffffea002bba4d28 objects=51 new=3 fp=0x0007000000000000 flags=0xa00000000000080 > > > > [ 15.752467] INFO: Object 0xffff880c7e5f3eb0 @offset=3760 > > > > [ 15.752467] > > > > [ 15.752467] Bytes b4 0xffff880c7e5f3ea0: 18 00 00 00 7e 00 00 00 5a 5a 5a 5a 5a 5a 5a 5a ....~...ZZZZZZZZ > > > > [ 15.752467] Object 0xffff880c7e5f3eb0: d0 0f 4f 7e 08 88 ff ff 80 10 4f 7e 08 88 ff ff .O~....O~.. > > > > [ 15.752467] Redzone 0xffff880c7e5f3ec0: 30 11 4f 7e 08 88 ff ff 0.O~.. > > > > [ 15.752467] Padding 0xffff880c7e5f3ef8: 00 16 4f 7e 08 88 ff ff ..O~.. > > > > > > 16 bytes allocated and a pointer array much larger than that is used. > > > > > > > Since the problem persists with and without CONFIG_SLUB_DEBUG_ON, I'd > > speculate that this is a problem with node scalability on my 4-node system > > if this boots fine for you. > > Looking at it. I have a fakenuma setup here that does not trigger it. > Guess I need something more real. Cannot reproduce it on my real 2 node numa system either. Trouble is that results in only one alien cache per cpu caching domain. -- 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/