On Wed 01-06-11 16:39:08, Igor Mammedov wrote: > On 06/01/2011 03:41 PM, Michal Hocko wrote: > >[Let's CC some cgroup people] > > > >On Wed 01-06-11 15:07:40, Igor Mammedov wrote: > >>Yes I've seen it (RHBZ#700565). > >I am not subscribed so I will not get there. > > > Sorry, I've not realized that BZ wasn't public, just fixed it. > It is public now. > > OOPS backtrace looks like this: > > Stopping cgconfig service: BUG: unable to handle kernel paging request at fffffffc Looks like one pointer underflow from NULL. > IP: [<c05235b3>] mem_cgroup_force_empty+0x123/0x4a0 > *pdpt = 00000000016a0001 *pde = 000000000000a067 *pte = 0000000000000000 > Oops: 0000 [#1] SMP > last sysfs file: /sys/module/nf_conntrack/refcnt > Modules linked in: xt_CHECKSUM tun bridge stp llc autofs4 sunrpc ipt_REJECT ip6t_REJECT ipv6 dm_mirror dm_region_hash dm_log uinput microcode xen_netfront sg i2c_piix4 i2c_core ext4 mbcache jbd2 sr_mod cdrom xen_blkfront ata_generic pata_acpi ata_piix dm_mod [last unloaded: nf_conntrack] > > Pid: 2300, comm: cgclear Not tainted (2.6.32-131.0.10.el6.i686 #1) HVM domU I realize that the issue is hard to reproduce but have you tried it with the .39 vanilla? Or at least try it with fce66477 (just a blind shot). > EIP: 0060:[<c05235b3>] EFLAGS: 00010206 CPU: 0 > EIP is at mem_cgroup_force_empty+0x123/0x4a0 > EAX: 00000206 EBX: fffffff4 ECX: c0a3f1e0 EDX: 00000206 > ESI: 00000206 EDI: 00000000 EBP: f343ca00 ESP: f34e7e84 > DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 > Process cgclear (pid: 2300, ti=f34e6000 task=f35baab0 task.ti=f34e6000) > Stack: > ffffffff 00000001 00000000 f34e7eb8 00000100 00000000 c0a3f1e0 c05a5af5 > <0> f343ca00 f343cc00 00000000 00000000 00000000 00000000 00000000 00000000 > <0> c0a3e7c0 f35172c0 00000005 00000000 f35172d0 f35baab0 00000000 f35172c0 > Call Trace: > [<c05a5af5>] ? may_link+0xc5/0x130 > [<c049b246>] ? cgroup_rmdir+0x96/0x3f0 > [<c0473f20>] ? autoremove_wake_function+0x0/0x40 > [<c05339ce>] ? vfs_rmdir+0x9e/0xd0 > [<c0536806>] ? do_rmdir+0xc6/0xe0 > [<c0506702>] ? do_munmap+0x1f2/0x2c0 > [<c04adecc>] ? audit_syscall_entry+0x21c/0x240 > [<c04adbe6>] ? audit_syscall_exit+0x216/0x240 > [<c0409adf>] ? sysenter_do_call+0x12/0x28 > Code: 89 7c 24 20 8b 54 95 08 31 ff 89 44 24 14 81 c2 00 01 00 00 89 54 24 10 e9 83 00 00 00 8d 76 00 8b 44 24 18 89 f2 e8 7d 12 30 00<8b> 73 08 8b 7c 24 24 8b 07 8b 40 18 85 c0 89 44 24 08 0f 84 c5 > EIP: [<c05235b3>] mem_cgroup_force_empty+0x123/0x4a0 SS:ESP 0068:f34e7e84 > CR2: 00000000fffffffc Code: 89 7c 24 20 8b 54 95 08 31 ff 89 44 24 14 81 c2 00 01 00 00 89 54 24 10 e9 83 00 00 00 8d 76 00 8b 44 24 18 89 f2 e8 7d 12 30 00 <8b> 73 08 8b 7c 24 24 8b 07 8b 40 18 85 c0 89 44 24 08 0f 84 c5 All code ======== 0: 89 7c 24 20 mov %edi,0x20(%esp) 4: 8b 54 95 08 mov 0x8(%ebp,%edx,4),%edx 8: 31 ff xor %edi,%edi a: 89 44 24 14 mov %eax,0x14(%esp) e: 81 c2 00 01 00 00 add $0x100,%edx 14: 89 54 24 10 mov %edx,0x10(%esp) 18: e9 83 00 00 00 jmp 0xa0 1d: 8d 76 00 lea 0x0(%esi),%esi 20: 8b 44 24 18 mov 0x18(%esp),%eax 24: 89 f2 mov %esi,%edx 26: e8 7d 12 30 00 call 0x3012a8 2b:* 8b 73 08 mov 0x8(%ebx),%esi <-- trapping instruction 2e: 8b 7c 24 24 mov 0x24(%esp),%edi 32: 8b 07 mov (%edi),%eax 34: 8b 40 18 mov 0x18(%eax),%eax 37: 85 c0 test %eax,%eax 39: 89 44 24 08 mov %eax,0x8(%esp) 3d: 0f .byte 0xf 3e: 84 c5 test %al,%ch Could you send your config file. I cannot find out much from this. -- Michal Hocko SUSE Labs SUSE LINUX s.r.o. Lihovarska 1060/12 190 00 Praha 9 Czech Republic -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>