I'm not sure if this information is helpful, but i am seeing the process (mnexec) hanging in a kernel-call.
# uname -a Linux fgcn-of-3 3.2.0-4-amd64 #1 SMP Debian 3.2.46-1 x86_64 GNU/Linux this is a snippet from my syslog: Jul 9 15:43:25 fgcn-of-3 kernel: [11261.060357] unregister_netdevice: waiting for lo to become free. Usage count = 3 Jul 9 15:43:35 fgcn-of-3 kernel: [11271.291483] unregister_netdevice: waiting for lo to become free. Usage count = 3 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619216] INFO: task mnexec:16236 blocked for more than 120 seconds. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619220] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619223] mnexec D ffff88063fc93780 0 16236 1 0x00000000 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619228] ffff88060e28d810 0000000000000082 0000000000000000 ffff880626a6e8b0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619235] 0000000000013780 ffff88060b4b7fd8 ffff88060b4b7fd8 ffff88060e28d810 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619240] 0000000000000000 00000001810ce209 ffff880609c3a0d0 ffffffff81659710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619245] Call Trace: Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619255] [<ffffffff8134e11c>] ? __mutex_lock_common.isra.5+0xff/0x164 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619259] [<ffffffff8134e00a>] ? mutex_lock+0x1a/0x2d Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619265] [<ffffffff8128a9f5>] ? copy_net_ns+0x5c/0xcb Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619271] [<ffffffff81063065>] ? create_new_namespaces+0xd2/0x156 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619275] [<ffffffff81063255>] ? unshare_nsproxy_namespaces+0x57/0x6f Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619281] [<ffffffff810463ff>] ? sys_unshare+0xa7/0x1ff Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619285] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619289] INFO: task mnexec:16237 blocked for more than 120 seconds. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619292] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619294] mnexec D ffff88063fcf3780 0 16237 1 0x00000000 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619299] ffff88060d7287b0 0000000000000086 ffff880600000000 ffff880626aef0a0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619305] 0000000000013780 ffff88060b68dfd8 ffff88060b68dfd8 ffff88060d7287b0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619310] ffff880626adcd80 00000001000412d0 ffff880609ea0300 ffffffff81659710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619315] Call Trace: Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619319] [<ffffffff8134e11c>] ? __mutex_lock_common.isra.5+0xff/0x164 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619323] [<ffffffff8134e00a>] ? mutex_lock+0x1a/0x2d Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619327] [<ffffffff8128a9f5>] ? copy_net_ns+0x5c/0xcb Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619332] [<ffffffff81063065>] ? create_new_namespaces+0xd2/0x156 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619336] [<ffffffff81063255>] ? unshare_nsproxy_namespaces+0x57/0x6f Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619340] [<ffffffff810463ff>] ? sys_unshare+0xa7/0x1ff Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619344] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619348] INFO: task mnexec:16238 blocked for more than 120 seconds. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619350] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619353] mnexec D ffff88063fc93780 0 16238 1 0x00000000 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619357] ffff88060b4ef1a0 0000000000000082 0000000000000001 ffff88060eca1020 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619362] 0000000000013780 ffff880609fa3fd8 ffff880609fa3fd8 ffff88060b4ef1a0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619368] 0000000000000000 00000001810ce209 ffff88060d643fc0 ffffffff81659710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619373] Call Trace: Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619377] [<ffffffff8134e11c>] ? __mutex_lock_common.isra.5+0xff/0x164 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619381] [<ffffffff8134e00a>] ? mutex_lock+0x1a/0x2d Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619385] [<ffffffff8128a9f5>] ? copy_net_ns+0x5c/0xcb Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619389] [<ffffffff81063065>] ? create_new_namespaces+0xd2/0x156 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619394] [<ffffffff81063255>] ? unshare_nsproxy_namespaces+0x57/0x6f Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619398] [<ffffffff810463ff>] ? sys_unshare+0xa7/0x1ff Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619402] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619405] INFO: task mnexec:16239 blocked for more than 120 seconds. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619408] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619410] mnexec D ffff88063fcf3780 0 16239 1 0x00000000 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619415] ffff88060e0349f0 0000000000000082 0000000000000000 ffff880626aef0a0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619420] 0000000000013780 ffff88060b7bbfd8 ffff88060b7bbfd8 ffff88060e0349f0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619425] 0000000000000000 00000001810ce209 ffff88060b626dd0 ffffffff81659710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619430] Call Trace: Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619434] [<ffffffff8134e11c>] ? __mutex_lock_common.isra.5+0xff/0x164 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619439] [<ffffffff8134e00a>] ? mutex_lock+0x1a/0x2d Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619443] [<ffffffff8128a9f5>] ? copy_net_ns+0x5c/0xcb Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619447] [<ffffffff81063065>] ? create_new_namespaces+0xd2/0x156 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619451] [<ffffffff81063255>] ? unshare_nsproxy_namespaces+0x57/0x6f Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619455] [<ffffffff810463ff>] ? sys_unshare+0xa7/0x1ff Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619459] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619463] INFO: task mnexec:16240 blocked for more than 120 seconds. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619465] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619468] mnexec D ffff88063fc93780 0 16240 1 0x00000000 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619472] ffff8806237f8870 0000000000000086 ffffffff8161b100 ffff880626a60180 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619477] 0000000000013780 ffff88060b643fd8 ffff88060b643fd8 ffff8806237f8870 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619482] ffffffff81659710 ffffffffffffff02 ffffffff8104031c ffffffff81659710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619488] Call Trace: Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619491] [<ffffffff8104031c>] ? mutex_spin_on_owner+0x26/0x39 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619496] [<ffffffff8134e11c>] ? __mutex_lock_common.isra.5+0xff/0x164 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619500] [<ffffffff8134e00a>] ? mutex_lock+0x1a/0x2d Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619504] [<ffffffff8128a9f5>] ? copy_net_ns+0x5c/0xcb Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619508] [<ffffffff81063065>] ? create_new_namespaces+0xd2/0x156 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619512] [<ffffffff81063255>] ? unshare_nsproxy_namespaces+0x57/0x6f Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619516] [<ffffffff810463ff>] ? sys_unshare+0xa7/0x1ff Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619520] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619524] INFO: task mnexec:16241 blocked for more than 120 seconds. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619526] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619529] mnexec D ffff88063fcf3780 0 16241 1 0x00000000 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619533] ffff88060c946040 0000000000000086 0000000000000000 ffff880626aef0a0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619538] 0000000000013780 ffff8806117bbfd8 ffff8806117bbfd8 ffff88060c946040 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619543] 0000000000000000 00000001810ce209 ffff88060dcb4cc0 ffffffff81659710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619549] Call Trace: Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619553] [<ffffffff8134e11c>] ? __mutex_lock_common.isra.5+0xff/0x164 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619557] [<ffffffff8134e00a>] ? mutex_lock+0x1a/0x2d Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619561] [<ffffffff8128a9f5>] ? copy_net_ns+0x5c/0xcb Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619565] [<ffffffff81063065>] ? create_new_namespaces+0xd2/0x156 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619569] [<ffffffff81063255>] ? unshare_nsproxy_namespaces+0x57/0x6f Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619574] [<ffffffff810463ff>] ? sys_unshare+0xa7/0x1ff Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619577] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619581] INFO: task mnexec:16242 blocked for more than 120 seconds. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619583] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619586] mnexec D ffff88063fc93780 0 16242 1 0x00000000 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619591] ffff88060c8d6fa0 0000000000000086 0000000000000000 ffff880626a6e8b0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619596] 0000000000013780 ffff88060bd7ffd8 ffff88060bd7ffd8 ffff88060c8d6fa0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619601] 0000000000000000 00000001810ce209 ffff88060d8f8ac0 ffffffff81659710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619606] Call Trace: Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619610] [<ffffffff8134e11c>] ? __mutex_lock_common.isra.5+0xff/0x164 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619614] [<ffffffff8134e00a>] ? mutex_lock+0x1a/0x2d Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619618] [<ffffffff8128a9f5>] ? copy_net_ns+0x5c/0xcb Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619622] [<ffffffff81063065>] ? create_new_namespaces+0xd2/0x156 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619627] [<ffffffff81063255>] ? unshare_nsproxy_namespaces+0x57/0x6f Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619631] [<ffffffff810463ff>] ? sys_unshare+0xa7/0x1ff Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619634] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619638] INFO: task mnexec:16243 blocked for more than 120 seconds. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619641] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619643] mnexec D ffff88063fcf3780 0 16243 1 0x00000000 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619648] ffff88060a527710 0000000000000086 ffff880600000000 ffff880626aef0a0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619653] 0000000000013780 ffff88060e19ffd8 ffff88060e19ffd8 ffff88060a527710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619658] ffff880626adcd80 00000001000412d0 ffff88060dfb1970 ffffffff81659710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619663] Call Trace: Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619667] [<ffffffff8134e11c>] ? __mutex_lock_common.isra.5+0xff/0x164 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619672] [<ffffffff8134e00a>] ? mutex_lock+0x1a/0x2d Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619676] [<ffffffff8128a9f5>] ? copy_net_ns+0x5c/0xcb Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619680] [<ffffffff81063065>] ? create_new_namespaces+0xd2/0x156 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619684] [<ffffffff81063255>] ? unshare_nsproxy_namespaces+0x57/0x6f Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619688] [<ffffffff810463ff>] ? sys_unshare+0xa7/0x1ff Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619692] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619696] INFO: task mnexec:16244 blocked for more than 120 seconds. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619698] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619701] mnexec D ffff88063fc93780 0 16244 1 0x00000000 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619705] ffff880624d77550 0000000000000082 0000000000000000 ffff880626a6e8b0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619710] 0000000000013780 ffff88060bfc7fd8 ffff88060bfc7fd8 ffff880624d77550 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619715] 0000000000000000 00000001810ce209 ffff88060e2f2be8 ffffffff81659710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619720] Call Trace: Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619724] [<ffffffff8134e11c>] ? __mutex_lock_common.isra.5+0xff/0x164 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619729] [<ffffffff8134e00a>] ? mutex_lock+0x1a/0x2d Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619733] [<ffffffff8128a9f5>] ? copy_net_ns+0x5c/0xcb Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619737] [<ffffffff81063065>] ? create_new_namespaces+0xd2/0x156 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619741] [<ffffffff81063255>] ? unshare_nsproxy_namespaces+0x57/0x6f Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619745] [<ffffffff810463ff>] ? sys_unshare+0xa7/0x1ff Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619749] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619753] INFO: task mnexec:16245 blocked for more than 120 seconds. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619755] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619758] mnexec D ffff88063fcf3780 0 16245 1 0x00000000 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619762] ffff88062667e040 0000000000000086 0000000000000000 ffff880626aef0a0 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619767] 0000000000013780 ffff88060b79bfd8 ffff88060b79bfd8 ffff88062667e040 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619773] 0000000000000000 00000001810ce209 ffff88060c8faed8 ffffffff81659710 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619778] Call Trace: Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619782] [<ffffffff8134e11c>] ? __mutex_lock_common.isra.5+0xff/0x164 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619786] [<ffffffff8134e00a>] ? mutex_lock+0x1a/0x2d Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619790] [<ffffffff8128a9f5>] ? copy_net_ns+0x5c/0xcb Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619794] [<ffffffff81063065>] ? create_new_namespaces+0xd2/0x156 Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619798] [<ffffffff81063255>] ? unshare_nsproxy_namespaces+0x57/0x6f Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619803] [<ffffffff810463ff>] ? sys_unshare+0xa7/0x1ff Jul 9 15:43:36 fgcn-of-3 kernel: [11271.619806] [<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b Jul 9 15:43:45 fgcn-of-3 lldpd[2789]: lldpd_decode: unable to guess frame type Jul 9 15:43:46 fgcn-of-3 kernel: [11281.522690] unregister_netdevice: waiting for lo to become free. Usage count = 3 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1197078 Title: mininet created devices are not deleted correctly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1197078/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
