From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d03relay02.boulder.ibm.com (d03relay02.boulder.ibm.com [9.17.195.227]) by e32.co.us.ibm.com (8.13.1/8.13.1) with ESMTP id mA84xfln019831 for ; Fri, 7 Nov 2008 21:59:41 -0700 Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by d03relay02.boulder.ibm.com (8.13.8/8.13.8/NCO v9.1) with ESMTP id mA850kcg149946 for ; Fri, 7 Nov 2008 22:00:46 -0700 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id mA850GF4014294 for ; Fri, 7 Nov 2008 22:00:17 -0700 Message-ID: <49151CFF.8060503@us.ibm.com> Date: Fri, 07 Nov 2008 21:00:47 -0800 From: Badari Pulavarty MIME-Version: 1.0 Subject: Re: 2.6.28-rc3 mem_cgroup panic References: <1226096940.8805.4.camel@badari-desktop> <31630.10.75.179.62.1226111079.squirrel@webmail-b.css.fujitsu.com> <38971.10.75.179.62.1226112376.squirrel@webmail-b.css.fujitsu.com> In-Reply-To: <38971.10.75.179.62.1226112376.squirrel@webmail-b.css.fujitsu.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: KAMEZAWA Hiroyuki Cc: Balbir Singh , linux-mm , linux-kernel List-ID: KAMEZAWA Hiroyuki wrote: > KAMEZAWA Hiroyuki said: > >> Badari Pulavarty said: >> >>> Hi Balbir, >>> >>> I was running memory remove/add tests in a continuous loop. >>> I get following panic in mem_cgroup migration code. >>> >>> Is this a known issue ? >>> >>> >> No, this is new one. We don't see panic in cpuset based migration..so.. >> Maybe related to page_cgroup allocation/free code in memory hotplug >> notifier. >> >> Thank you for report. I'll try this. >> >> > Hmm...at quick look... > > online/offline page_cgroup's calculation for "start" is buggy.. > > -start = start_pfn & (PAGES_PER_SECTION - 1); > +start = start_pfn & ~(PAGES_PER_SECTION - 1); > > I'm sorry I can't write patch today. > > Regards, > -Kame > > Thanks for the fix. Tests are running fine now. Thanks, Badari -- 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