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 8E81C6B0044 for ; Fri, 16 Jan 2009 01:15:50 -0500 (EST) Message-ID: <497025E8.8050207@cn.fujitsu.com> Date: Fri, 16 Jan 2009 14:15:04 +0800 From: Li Zefan MIME-Version: 1.0 Subject: [BUG] memcg: panic when rmdir() Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: KAMEZAWA Hiroyuki , Balbir Singh Cc: Daisuke Nishimura , "linux-mm@kvack.org" List-ID: 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 ------------[ 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