Re: [Lxc-users] 6mn to launch a VM (lxc hung_task_timeout_secs)
On 08/20/2010 09:16 AM, Sebastien Douche wrote: On Thu, Aug 19, 2010 at 23:23, Daniel Lezcanodaniel.lezc...@free.fr wrote: Hmm, it is very probable the problem is located in the kernel. This kind of warnings appears when a task is in a uninterruptible state and the kernel compilation option CONFIG_DETECT_HUNG_TASK is set. What is the kernel version ? # uname -a Linux srv3 2.6.32-trunk-amd64 #1 SMP Sun Jan 10 22:40:40 UTC 2010 x86_64 GNU/Linux It's a Debian Squeeze (up to date). After some tests, it seems related with some device nodes creation (/dev/pts, /dev/shm...) but i'm not sure. I think you hit a kernel bug. May be this one : https://bugzilla.kernel.org/show_bug.cgi?id=14430 Normally, a system container spawns instantaneously. When the containers starts it does pivot_root and unmount all previous mount points belonging to the old rootfs. Is it possible you have a particular mount on your system which triggers this problem ? Thanks -- Daniel -- This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev ___ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users
Re: [Lxc-users] 6mn to launch a VM (lxc hung_task_timeout_secs)
On 08/19/2010 11:18 AM, Sebastien Douche wrote: Hi folks, I have the problem each time I launch a VM (no more result with the sysctl setting). Any ideas to resolve this issue? The dmesg: [ 7560.404075] INFO: task mount:27788 blocked for more than 120 seconds. [ 7560.404123] echo 0 /proc/sys/kernel/hung_task_timeout_secs disables this message. [ 7560.404169] mount D 0002 0 27788 27701 0x0004 [ 7560.404175] 88012bc58710 0082 0286 88000540fa68 [ 7560.404181] 0286 f8a0 8800b80abfd8 [ 7560.404186] 000155c0 000155c0 88012db062e0 88012db065d8 [ 7560.404191] Call Trace: [ 7560.404201] [811052ab] ? bdi_sched_wait+0x0/0xe [ 7560.404206] [811052b4] ? bdi_sched_wait+0x9/0xe [ 7560.404217] [812e5dc6] ? __wait_on_bit+0x41/0x70 [ 7560.404220] [811052ab] ? bdi_sched_wait+0x0/0xe [ 7560.404224] [812e5e60] ? out_of_line_wait_on_bit+0x6b/0x77 [ 7560.404228] [81064adc] ? wake_bit_function+0x0/0x23 [ 7560.404232] [8110532c] ? sync_inodes_sb+0x73/0x129 [ 7560.404235] [81108e81] ? __sync_filesystem+0x4b/0x70 [ 7560.404240] [810ed562] ? do_remount_sb+0x60/0x122 [ 7560.404243] [81101a96] ? do_mount+0x27a/0x792 [ 7560.404246] [8110202e] ? sys_mount+0x80/0xba [ 7560.404252] [81010b02] ? system_call_fastpath+0x16/0x1b [ 7594.577136] br1: port 3(vethvaLKCB) entering disabled state [ 7594.592611] br1: port 3(vethvaLKCB) entering disabled state [ 7594.657095] br0: port 3(vethLxLiar) entering disabled state [ 7594.672608] br0: port 3(vethLxLiar) entering disabled state [ 7753.540023] device vethvh8sS7 entered promiscuous mode [ 7753.540839] ADDRCONF(NETDEV_UP): vethvh8sS7: link is not ready [ 7753.543136] device vethhNdkjz entered promiscuous mode [ 7753.543778] ADDRCONF(NETDEV_UP): vethhNdkjz: link is not ready [ 7753.546074] lo: Disabled Privacy Extensions [ 7753.602317] ADDRCONF(NETDEV_CHANGE): vethvh8sS7: link becomes ready [ 7753.602343] br1: port 3(vethvh8sS7) entering forwarding state [ 7753.605034] ADDRCONF(NETDEV_CHANGE): vethhNdkjz: link becomes ready [ 7753.605058] br0: port 3(vethhNdkjz) entering forwarding state [ 7763.612089] eth0: no IPv6 routers present [ 7763.912148] vethhNdkjz: no IPv6 routers present [ 7764.504028] eth1: no IPv6 routers present [ 7764.584042] vethvh8sS7: no IPv6 routers present [ 7920.404063] INFO: task mount:27993 blocked for more than 120 seconds. [ 7920.404096] echo 0 /proc/sys/kernel/hung_task_timeout_secs disables this message. [ 7920.404142] mount D 0002 0 27993 27986 0x [ 7920.404148] 88012bc58710 0086 0286 88000540fa68 [ 7920.404154] 0286 f8a0 8800379e7fd8 [ 7920.404159] 000155c0 000155c0 88012db062e0 88012db065d8 [ 7920.404164] Call Trace: [ 7920.404175] [811052ab] ? bdi_sched_wait+0x0/0xe [ 7920.404179] [811052b4] ? bdi_sched_wait+0x9/0xe [ 7920.404186] [812e5dc6] ? __wait_on_bit+0x41/0x70 [ 7920.404190] [811052ab] ? bdi_sched_wait+0x0/0xe [ 7920.404199] [812e5e60] ? out_of_line_wait_on_bit+0x6b/0x77 [ 7920.404203] [81064adc] ? wake_bit_function+0x0/0x23 [ 7920.404207] [8110532c] ? sync_inodes_sb+0x73/0x129 [ 7920.404210] [81108e81] ? __sync_filesystem+0x4b/0x70 [ 7920.404214] [810ed562] ? do_remount_sb+0x60/0x122 [ 7920.404217] [81101a96] ? do_mount+0x27a/0x792 [ 7920.404221] [8110202e] ? sys_mount+0x80/0xba [ 7920.404226] [81010b02] ? system_call_fastpath+0x16/0x1b [ 8040.404062] INFO: task mount:27993 blocked for more than 120 seconds. [ 8040.404095] echo 0 /proc/sys/kernel/hung_task_timeout_secs disables this message. [ 8040.404141] mount D 0002 0 27993 27986 0x [ 8040.404147] 88012bc58710 0086 0286 88000540fa68 [ 8040.404152] 0286 f8a0 8800379e7fd8 [ 8040.404157] 000155c0 000155c0 88012db062e0 88012db065d8 [ 8040.404162] Call Trace: [ 8040.404173] [811052ab] ? bdi_sched_wait+0x0/0xe [ 8040.404178] [811052b4] ? bdi_sched_wait+0x9/0xe [ 8040.404184] [812e5dc6] ? __wait_on_bit+0x41/0x70 [ 8040.404188] [811052ab] ? bdi_sched_wait+0x0/0xe [ 8040.404198] [812e5e60] ? out_of_line_wait_on_bit+0x6b/0x77 [ 8040.404202] [81064adc] ? wake_bit_function+0x0/0x23 [ 8040.404206] [8110532c] ? sync_inodes_sb+0x73/0x129 [ 8040.404209] [81108e81] ? __sync_filesystem+0x4b/0x70 [ 8040.404213] [810ed562] ? do_remount_sb+0x60/0x122 [ 8040.404216] [81101a96] ? do_mount+0x27a/0x792 [ 8040.404219] [8110202e] ?
