From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with SMTP id 3A8206B0047 for ; Fri, 16 Jan 2009 01:20:08 -0500 (EST) Received: from m2.gw.fujitsu.co.jp ([10.0.50.72]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id n0G6K5Mn004680 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Fri, 16 Jan 2009 15:20:05 +0900 Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id D34C945DE51 for ; Fri, 16 Jan 2009 15:20:04 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (s2.gw.fujitsu.co.jp [10.0.50.92]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id 9845D45DE5D for ; Fri, 16 Jan 2009 15:20:04 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 7B501E38001 for ; Fri, 16 Jan 2009 15:20:04 +0900 (JST) Received: from ml13.s.css.fujitsu.com (ml13.s.css.fujitsu.com [10.249.87.103]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 280361DB803C for ; Fri, 16 Jan 2009 15:20:04 +0900 (JST) Date: Fri, 16 Jan 2009 15:19:00 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [BUG] memcg: panic when rmdir() Message-Id: <20090116151900.f86cc1a3.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <497025E8.8050207@cn.fujitsu.com> References: <497025E8.8050207@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Li Zefan Cc: Balbir Singh , Daisuke Nishimura , "linux-mm@kvack.org" List-ID: On Fri, 16 Jan 2009 14:15:04 +0800 Li Zefan wrote: > Found this when testing memory resource controller, can be triggered > with: > - CONFIG_CGROUP_MEM_RES_CTLR_SWAP=n > - or CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y > - or CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y && boot with noswapaccount > > # mount -t cgroup -o memory xxx /mnt > # mkdir /mnt/0 > # for pid in `cat /mnt/tasks`; do echo $pid > /mnt/0/tasks; done > # echo "low limit" > /mnt/0/tasks > # do whatever to allocate some memory > # swapoff -a > killed (by OOM) > # for pid in `cat /mnt/0/tasks`; do echo $pid > /mnt/tasks; done > # rmdir /mnt/0 > Isn't this a problem Nishimura fixed today ? could you try memcg-get-put-parents-at-create-free.patch in mm-commits ? Sorry for inconvinience, I'll send you the patch in private mail if necessary. Thanks, -Kame > ------------[ cut here ]------------ > WARNING: at kernel/res_counter.c:71 res_counter_uncharge_locked+0x25/0x36() > Hardware name: Aspire SA85 > Modules linked in: bridge stp llc autofs4 dm_mirror dm_region_hash dm_log dm_mod parport_pc button sg r8169 mii parport sata_sis pata_sis ata_generic libata sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last unloaded: scsi_wait_scan] > Pid: 2548, comm: rmdir Tainted: G W 2.6.29-rc1-mm1 #4 > Call Trace: > [] warn_slowpath+0x79/0x8f > [] ? clockevents_program_event+0xe0/0xef > [] ? res_counter_charge+0x35/0xb0 > [] ? res_counter_uncharge+0x29/0x5f > [] res_counter_uncharge_locked+0x25/0x36 > [] res_counter_uncharge+0x33/0x5f > [] mem_cgroup_force_empty+0x21b/0x498 > [] mem_cgroup_pre_destroy+0x12/0x14 > [] cgroup_rmdir+0x5e/0x27e > [] ? _spin_unlock+0x2c/0x41 > [] vfs_rmdir+0x5b/0x9c > [] do_rmdir+0x89/0xc8 > [] ? up_read+0x1b/0x2e > [] ? do_page_fault+0x356/0x5ed > [] sys_rmdir+0x15/0x17 > [] sysenter_do_call+0x12/0x35 > ---[ end trace 4eaa2a86a8e2da24 ]--- > ------------[ cut here ]------------ > kernel BUG at kernel/cgroup.c:2517! > invalid opcode: 0000 [#1] PREEMPT SMP > last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/irq > Modules linked in: bridge stp llc autofs4 dm_mirror dm_region_hash dm_log dm_mod parport_pc button sg r8169 mii parport sata_sis pata_sis ata_generic libata sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last unloaded: scsi_wait_scan] > > Pid: 2548, comm: rmdir Tainted: G W (2.6.29-rc1-mm1 #4) Aspire SA85 > EIP: 0060:[] EFLAGS: 00210046 CPU: 1 > EIP is at cgroup_rmdir+0xda/0x27e > EAX: f442b800 EBX: ed00b3c0 ECX: c04607ca EDX: 00000000 > ESI: c0778dc0 EDI: 00200246 EBP: ed252f30 ESP: ed252f14 > DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > Process rmdir (pid: 2548, ti=ed252000 task=e19aa8c0 task.ti=ed252000) > Stack: > 00000000 f442b800 c0621d08 e18a8014 e2d96a00 fffffff0 e2ccadf0 ed252f44 > c04a67fe e2d96a00 00000000 0804ca00 ed252fa8 c04a7b8c ed269080 e2d745a0 > 00002121 00000001 f46a3000 00000000 00000000 00000000 ed0a6d34 00000004 > Call Trace: > [] ? _spin_unlock+0x2c/0x41 > [] ? vfs_rmdir+0x5b/0x9c > [] ? do_rmdir+0x89/0xc8 > [] ? up_read+0x1b/0x2e > [] ? do_page_fault+0x356/0x5ed > [] ? sys_rmdir+0x15/0x17 > [] ? sysenter_do_call+0x12/0x35 > Code: c8 fe ff 8b 43 40 8b 70 0c eb 3e 8b 46 28 8b 44 83 20 89 45 e8 8b 55 e8 8b 52 04 83 fa 01 89 55 e4 0f 8f 5f ff ff ff 85 d2 75 04 <0f> 0b eb fe 8b 45 e4 31 c9 8b 55 e8 f0 0f b1 4a 04 8b 55 e4 39 > EIP: [] cgroup_rmdir+0xda/0x27e SS:ESP 0068:ed252f14 > ---[ end trace 4eaa2a86a8e2da25 ]--- > > > > > -- 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