{"action":"created","issue":{"url":"https://api.github.com/repos/docker/docker/issues/5618","repository_url":"https://api.github.com/repos/docker/docker","labels_url":"https://api.github.com/repos/docker/docker/issues/5618/labels{/name}","comments_url":"https://api.github.com/repos/docker/docker/issues/5618/comments","events_url":"https://api.github.com/repos/docker/docker/issues/5618/events","html_url":"https://github.com/docker/docker/issues/5618","id":32864464,"number":5618,"title":"unregister_netdevice: waiting for lo to become free. Usage count = 3","user":{"login":"tankywoo","id":1169499,"avatar_url":"https://avatars.githubusercontent.com/u/1169499?v=3","gravatar_id":"","url":"https://api.github.com/users/tankywoo","html_url":"https://github.com/tankywoo","followers_url":"https://api.github.com/users/tankywoo/followers","following_url":"https://api.github.com/users/tankywoo/following{/other_user}","gists_url":"https://api.github.com/users/tankywoo/gists{/gist_id}","starred_url":"https://api.github.com/users/tankywoo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tankywoo/subscriptions","organizations_url":"https://api.github.com/users/tankywoo/orgs","repos_url":"https://api.github.com/users/tankywoo/repos","events_url":"https://api.github.com/users/tankywoo/events{/privacy}","received_events_url":"https://api.github.com/users/tankywoo/received_events","type":"User","site_admin":false},"labels":[{"id":102727640,"url":"https://api.github.com/repos/docker/docker/labels/area/kernel","name":"area/kernel","color":"fbca04","default":false},{"id":237472034,"url":"https://api.github.com/repos/docker/docker/labels/area/networking","name":"area/networking","color":"fbca04","default":false}],"state":"open","locked":false,"assignee":{"login":"aboch","id":10080882,"avatar_url":"https://avatars.githubusercontent.com/u/10080882?v=3","gravatar_id":"","url":"https://api.github.com/users/aboch","html_url":"https://github.com/aboch","followers_url":"https://api.github.com/users/aboch/followers","following_url":"https://api.github.com/users/aboch/following{/other_user}","gists_url":"https://api.github.com/users/aboch/gists{/gist_id}","starred_url":"https://api.github.com/users/aboch/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/aboch/subscriptions","organizations_url":"https://api.github.com/users/aboch/orgs","repos_url":"https://api.github.com/users/aboch/repos","events_url":"https://api.github.com/users/aboch/events{/privacy}","received_events_url":"https://api.github.com/users/aboch/received_events","type":"User","site_admin":false},"assignees":[{"login":"aboch","id":10080882,"avatar_url":"https://avatars.githubusercontent.com/u/10080882?v=3","gravatar_id":"","url":"https://api.github.com/users/aboch","html_url":"https://github.com/aboch","followers_url":"https://api.github.com/users/aboch/followers","following_url":"https://api.github.com/users/aboch/following{/other_user}","gists_url":"https://api.github.com/users/aboch/gists{/gist_id}","starred_url":"https://api.github.com/users/aboch/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/aboch/subscriptions","organizations_url":"https://api.github.com/users/aboch/orgs","repos_url":"https://api.github.com/users/aboch/repos","events_url":"https://api.github.com/users/aboch/events{/privacy}","received_events_url":"https://api.github.com/users/aboch/received_events","type":"User","site_admin":false}],"milestone":null,"comments":245,"created_at":"2014-05-06T03:48:01Z","updated_at":"2016-12-01T16:28:10Z","closed_at":null,"body":"This happens when I login the container, and can't quit by Ctrl-c.\n\nMy system is `Ubuntu 12.04`, kernel is `3.8.0-25-generic`.\n\ndocker version:\n\n```\nroot@wutq-docker:~# docker version\nClient version: 0.10.0\nClient API version: 1.10\nGo version (client): go1.2.1\nGit commit (client): dc9c28f\nServer version: 0.10.0\nServer API version: 1.10\nGit commit (server): dc9c28f\nGo version (server): go1.2.1\nLast stable version: 0.10.0\n```\n\nI have used the script https://raw.githubusercontent.com/dotcloud/docker/master/contrib/check-config.sh to check, and all right.\n\nI watch the syslog and found this message:\n\n```\nMay  6 11:30:33 wutq-docker kernel: [62365.889369] unregister_netdevice: waiting for lo to become free. Usage count = 3\nMay  6 11:30:44 wutq-docker kernel: [62376.108277] unregister_netdevice: waiting for lo to become free. Usage count = 3\nMay  6 11:30:54 wutq-docker kernel: [62386.327156] unregister_netdevice: waiting for lo to become free. Usage count = 3\nMay  6 11:31:02 wutq-docker kernel: [62394.423920] INFO: task docker:1024 blocked for more than 120 seconds.\nMay  6 11:31:02 wutq-docker kernel: [62394.424175] \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\nMay  6 11:31:02 wutq-docker kernel: [62394.424505] docker          D 0000000000000001     0  1024      1 0x00000004\nMay  6 11:31:02 wutq-docker kernel: [62394.424511]  ffff880077793cb0 0000000000000082 ffffffffffffff04 ffffffff816df509\nMay  6 11:31:02 wutq-docker kernel: [62394.424517]  ffff880077793fd8 ffff880077793fd8 ffff880077793fd8 0000000000013f40\nMay  6 11:31:02 wutq-docker kernel: [62394.424521]  ffff88007c461740 ffff880076b1dd00 000080d081f06880 ffffffff81cbbda0\nMay  6 11:31:02 wutq-docker kernel: [62394.424526] Call Trace:                                                         \nMay  6 11:31:02 wutq-docker kernel: [62394.424668]  [<ffffffff816df509>] ? __slab_alloc+0x28a/0x2b2\nMay  6 11:31:02 wutq-docker kernel: [62394.424700]  [<ffffffff816f1849>] schedule+0x29/0x70\nMay  6 11:31:02 wutq-docker kernel: [62394.424705]  [<ffffffff816f1afe>] schedule_preempt_disabled+0xe/0x10\nMay  6 11:31:02 wutq-docker kernel: [62394.424710]  [<ffffffff816f0777>] __mutex_lock_slowpath+0xd7/0x150\nMay  6 11:31:02 wutq-docker kernel: [62394.424715]  [<ffffffff815dc809>] ? copy_net_ns+0x69/0x130\nMay  6 11:31:02 wutq-docker kernel: [62394.424719]  [<ffffffff815dc0b1>] ? net_alloc_generic+0x21/0x30\nMay  6 11:31:02 wutq-docker kernel: [62394.424724]  [<ffffffff816f038a>] mutex_lock+0x2a/0x50\nMay  6 11:31:02 wutq-docker kernel: [62394.424727]  [<ffffffff815dc82c>] copy_net_ns+0x8c/0x130\nMay  6 11:31:02 wutq-docker kernel: [62394.424733]  [<ffffffff81084851>] create_new_namespaces+0x101/0x1b0\nMay  6 11:31:02 wutq-docker kernel: [62394.424737]  [<ffffffff81084a33>] copy_namespaces+0xa3/0xe0\nMay  6 11:31:02 wutq-docker kernel: [62394.424742]  [<ffffffff81057a60>] ? dup_mm+0x140/0x240\nMay  6 11:31:02 wutq-docker kernel: [62394.424746]  [<ffffffff81058294>] copy_process.part.22+0x6f4/0xe60\nMay  6 11:31:02 wutq-docker kernel: [62394.424752]  [<ffffffff812da406>] ? security_file_alloc+0x16/0x20\nMay  6 11:31:02 wutq-docker kernel: [62394.424758]  [<ffffffff8119d118>] ? get_empty_filp+0x88/0x180\nMay  6 11:31:02 wutq-docker kernel: [62394.424762]  [<ffffffff81058a80>] copy_process+0x80/0x90\nMay  6 11:31:02 wutq-docker kernel: [62394.424766]  [<ffffffff81058b7c>] do_fork+0x9c/0x230\nMay  6 11:31:02 wutq-docker kernel: [62394.424769]  [<ffffffff816f277e>] ? _raw_spin_lock+0xe/0x20\nMay  6 11:31:02 wutq-docker kernel: [62394.424774]  [<ffffffff811b9185>] ? __fd_install+0x55/0x70\nMay  6 11:31:02 wutq-docker kernel: [62394.424777]  [<ffffffff81058d96>] sys_clone+0x16/0x20\nMay  6 11:31:02 wutq-docker kernel: [62394.424782]  [<ffffffff816fb939>] stub_clone+0x69/0x90\nMay  6 11:31:02 wutq-docker kernel: [62394.424786]  [<ffffffff816fb5dd>] ? system_call_fastpath+0x1a/0x1f\nMay  6 11:31:04 wutq-docker kernel: [62396.466223] unregister_netdevice: waiting for lo to become free. Usage count = 3\nMay  6 11:31:14 wutq-docker kernel: [62406.689132] unregister_netdevice: waiting for lo to become free. Usage count = 3\nMay  6 11:31:25 wutq-docker kernel: [62416.908036] unregister_netdevice: waiting for lo to become free. Usage count = 3\nMay  6 11:31:35 wutq-docker kernel: [62427.126927] unregister_netdevice: waiting for lo to become free. Usage count = 3\nMay  6 11:31:45 wutq-docker kernel: [62437.345860] unregister_netdevice: waiting for lo to become free. Usage count = 3\n```\n\nAfter happend this, I open another terminal and kill this process, and then restart docker, but this will be hanged.\n\nI reboot the host, and it still display that messages for some minutes when shutdown:\n![screen shot 2014-05-06 at 11 49 27](https://cloud.githubusercontent.com/assets/1169499/2885827/78dcd126-d4d0-11e3-8b0b-e1ccca449589.png)\n"},"comment":{"url":"https://api.github.com/repos/docker/docker/issues/comments/264220432","html_url":"https://github.com/docker/docker/issues/5618#issuecomment-264220432","issue_url":"https://api.github.com/repos/docker/docker/issues/5618","id":264220432,"user":{"login":"ernestm","id":1273721,"avatar_url":"https://avatars.githubusercontent.com/u/1273721?v=3","gravatar_id":"","url":"https://api.github.com/users/ernestm","html_url":"https://github.com/ernestm","followers_url":"https://api.github.com/users/ernestm/followers","following_url":"https://api.github.com/users/ernestm/following{/other_user}","gists_url":"https://api.github.com/users/ernestm/gists{/gist_id}","starred_url":"https://api.github.com/users/ernestm/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ernestm/subscriptions","organizations_url":"https://api.github.com/users/ernestm/orgs","repos_url":"https://api.github.com/users/ernestm/repos","events_url":"https://api.github.com/users/ernestm/events{/privacy}","received_events_url":"https://api.github.com/users/ernestm/received_events","type":"User","site_admin":false},"created_at":"2016-12-01T16:28:10Z","updated_at":"2016-12-01T16:28:10Z","body":"I am actually seeing this on Amazon Linux in an ECS cluster - the message occasionally throws but it doesn't lock up, like reshen's seeing now.  Docker 1.11.2.  Uname reports \"4.4.14-24.50.amzn1.x86_64\" as the version. "}}
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