From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mt1.gw.fujitsu.co.jp ([10.0.50.74]) by fgwmail5.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id mA82kHwJ012253 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Sat, 8 Nov 2008 11:46:17 +0900 Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id AE84E45DD7A for ; Sat, 8 Nov 2008 11:46:17 +0900 (JST) Received: from s8.gw.fujitsu.co.jp (s8.gw.fujitsu.co.jp [10.0.50.98]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 8D85045DD78 for ; Sat, 8 Nov 2008 11:46:17 +0900 (JST) Received: from s8.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s8.gw.fujitsu.co.jp (Postfix) with ESMTP id 6FE0F1DB8038 for ; Sat, 8 Nov 2008 11:46:17 +0900 (JST) Received: from ml13.s.css.fujitsu.com (ml13.s.css.fujitsu.com [10.249.87.103]) by s8.gw.fujitsu.co.jp (Postfix) with ESMTP id 2CCBB1DB8037 for ; Sat, 8 Nov 2008 11:46:17 +0900 (JST) Message-ID: <38971.10.75.179.62.1226112376.squirrel@webmail-b.css.fujitsu.com> In-Reply-To: <31630.10.75.179.62.1226111079.squirrel@webmail-b.css.fujitsu.com> References: <1226096940.8805.4.camel@badari-desktop> <31630.10.75.179.62.1226111079.squirrel@webmail-b.css.fujitsu.com> Date: Sat, 8 Nov 2008 11:46:16 +0900 (JST) Subject: Re: 2.6.28-rc3 mem_cgroup panic From: "KAMEZAWA Hiroyuki" MIME-Version: 1.0 Content-Type: text/plain;charset=us-ascii Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org Return-Path: To: KAMEZAWA Hiroyuki Cc: Badari Pulavarty , Balbir Singh , linux-mm , linux-kernel List-ID: 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 -- 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