From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f180.google.com (mail-ig0-f180.google.com [209.85.213.180]) by kanga.kvack.org (Postfix) with ESMTP id D6AB46B006E for ; Mon, 15 Dec 2014 09:14:07 -0500 (EST) Received: by mail-ig0-f180.google.com with SMTP id h15so5109233igd.13 for ; Mon, 15 Dec 2014 06:14:07 -0800 (PST) Received: from resqmta-po-04v.sys.comcast.net (resqmta-po-04v.sys.comcast.net. [2001:558:fe16:19:96:114:154:163]) by mx.google.com with ESMTPS id dw9si6682268igb.58.2014.12.15.06.14.06 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Mon, 15 Dec 2014 06:14:06 -0800 (PST) Date: Mon, 15 Dec 2014 08:14:04 -0600 (CST) From: Christoph Lameter Subject: Re: [Question] Crash of kmem_cache_cpu->freelist access In-Reply-To: Message-ID: References: Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Gavin Guo Cc: linux-mm@kvack.org, penberg@kernel.org, mpm@selenic.com On Sun, 14 Dec 2014, Gavin Guo wrote: > I tried to disassembly and found that the object is from c->freelist > and it has an abnormal value which caused the fault. My first thought > is to try to add slub_debug in the kernel command line. But, the > kernel is a production kernel and may not have the chance to add > kernel parameters. The other way is to "echo 1 > the slub_debug option is there so that production kernels *can* run with debugging and that we can locate these issues. If you cannot get to a boot prompt then please change the grub configuration and add the slub_debug parameter. -- 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