Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762404Ab0HQTCb (ORCPT ); Tue, 17 Aug 2010 15:02:31 -0400 Received: from smtp-out.google.com ([216.239.44.51]:7033 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762296Ab0HQTC2 (ORCPT ); Tue, 17 Aug 2010 15:02:28 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=date:from:x-x-sender:to:cc:subject:in-reply-to:message-id: references:user-agent:mime-version:content-type:x-system-of-record; b=S8Ok3UsgcoysgjitUz3xLM2dyMEBSpAgQYqFKnOWSr9PfrhPi2PenxxvPKeWXZxFW KEZUiMcKlGdWxaAROwVhA== Date: Tue, 17 Aug 2010 12:02:23 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Christoph Lameter 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 X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1612 Lines: 28 On Tue, 17 Aug 2010, Christoph Lameter wrote: > Well yes I guess that is the result of large scale corruption that is > reaching into the debug fields of the object. > > > [ 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. -- 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/