From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with ESMTP id A5DCF6B01F0 for ; Tue, 17 Aug 2010 15:02:27 -0400 (EDT) Received: from wpaz33.hot.corp.google.com (wpaz33.hot.corp.google.com [172.24.198.97]) by smtp-out.google.com with ESMTP id o7HJ2Rjv020306 for ; Tue, 17 Aug 2010 12:02:27 -0700 Received: from pwi3 (pwi3.prod.google.com [10.241.219.3]) by wpaz33.hot.corp.google.com with ESMTP id o7HJ2PuF030575 for ; Tue, 17 Aug 2010 12:02:26 -0700 Received: by pwi3 with SMTP id 3so1966256pwi.14 for ; Tue, 17 Aug 2010 12:02:25 -0700 (PDT) Date: Tue, 17 Aug 2010 12:02:23 -0700 (PDT) From: David Rientjes 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> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Christoph Lameter Cc: Pekka Enberg , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Nick Piggin List-ID: 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, 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/ . Don't email: email@kvack.org