From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 21 Oct 2008 15:38:55 +0900 From: Daisuke Nishimura Subject: Re: [memcg BUG] unable to handle kernel NULL pointer derefence at 00000000 Message-Id: <20081021153855.cf347e84.nishimura@mxp.nes.nec.co.jp> In-Reply-To: <48FD7695.6090407@cn.fujitsu.com> References: <20081017194804.fce28258.nishimura@mxp.nes.nec.co.jp> <20081017195601.0b9abda1.nishimura@mxp.nes.nec.co.jp> <6599ad830810201253u3bca41d4rabe48eb1ec1d529f@mail.gmail.com> <20081021101430.d2629a81.kamezawa.hiroyu@jp.fujitsu.com> <48FD6901.6050301@linux.vnet.ibm.com> <20081021143955.eeb86d49.kamezawa.hiroyu@jp.fujitsu.com> <48FD74AB.9010307@cn.fujitsu.com> <20081021152557.1540b22e.kamezawa.hiroyu@jp.fujitsu.com> <48FD7695.6090407@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Li Zefan Cc: nishimura@mxp.nes.nec.co.jp, KAMEZAWA Hiroyuki , balbir@linux.vnet.ibm.com, Paul Menage , linux-mm@kvack.org List-ID: On Tue, 21 Oct 2008 14:28:37 +0800, Li Zefan wrote: > KAMEZAWA Hiroyuki wrote: > > On Tue, 21 Oct 2008 14:20:27 +0800 > > Li Zefan wrote: > > > >>> BTW, "allocate all page_cgroup at boot" patch goes to Linus' git. Wow. > >>> > >> But seems this patch causes kernel panic at system boot ... (or maybe one of other > >> memcg patches?) > >> > >> I wrote down the panic manually: > >> > >> BUG: unable to handle kernel NULL pointer dereference at 00000000 > >> IP: page_cgroup_zoneinfo + 0xa > >> > >> Call Trace: > >> ? mem_cgroup_charge_common + 0x17d > >> ? mem_cgroup_charge > >> ? add_to_page_cache_locked > >> ? add_to_page_cache_lru > >> ? find_or_create_page > >> ? __getblk > >> ? ext3_get_inode_loc > >> ? ext3_iget > >> ? ext3_lookup > >> > >> Tell me if you need extra information. > >> > > This shows how small testers in -mm ...this is on x86 ? > > Yes, x86_32 > > > Could you show me your config ? > > attached > Hmm... I tested mmotm-2008-10-16-18-58 + memcg update v7 on x86_32 yesterday, but it worked fine. I'll try by your config. Thanks, Daisuke Nishimura. > > and what happens if cgroup_disable=memory ? > > > > then booted up successfully > > -- 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