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SubjectRe: [3.4-rc1][Regression][network wireless] 'task xxxx blocked for more than 120 seconds' after resume
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On Thu, 2012-04-05 at 22:08 +0200, Maciej Rutecki wrote:

> Dmesg when CONFIG_LOCKDEP is set:
>
> http://mrutecki.pl/download/kernel/3.4-rc1/netdev_resume/dmesg-lockdep.txt

Looks like rtl8169's fault:

[ 240.541718] 2 locks held by ifconfig/4964:
[ 240.541722] #0: (rtnl_mutex){+.+.+.}, at: [<ffffffff8138c86c>]
rtnl_lock+0x12/0x14
[ 240.541737] #1: (&tp->wk.mutex){+.+...}, at: [<ffffffffa00c1556>]
rtl_lock_work+0x12/0x14 [r8169]
[ 360.350345] INFO: task nmbd:2378 blocked for more than 120 seconds.
[ 360.353186] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[ 360.356124] nmbd D ffffffff81a76ab8 0 2378 1
0x00000000
[ 360.359078] ffff88022f573ab8 0000000000000046 ffff880233aa8040
ffff88022f573fd8
[ 360.362098] ffff88022f573fd8 0000000000013a40 ffff8802351b8040
ffff880233aa8040
[ 360.365170] ffffffff814532aa 000000001e3e7680 ffffffff81a76ab0
ffff880233aa8040
[ 360.368208] Call Trace:
[ 360.371129] [<ffffffff814532aa>] ? __mutex_lock_common+0x230/0x36e
[ 360.374159] [<ffffffff814543ca>] schedule+0x5f/0x61
[ 360.377195] [<ffffffff8145458e>] schedule_preempt_disabled+0x9/0xb
[ 360.380240] [<ffffffff814532b7>] __mutex_lock_common+0x23d/0x36e
[ 360.383262] [<ffffffff8138c86c>] ? rtnl_lock+0x12/0x14
[ 360.386260] [<ffffffff8139fe60>] ? netlink_lookup+0x2b/0x7e
[ 360.389279] [<ffffffff8138c86c>] ? rtnl_lock+0x12/0x14
[ 360.392352] [<ffffffff814534a7>] mutex_lock_nested+0x2a/0x31
[ 360.395393] [<ffffffff8138c86c>] rtnl_lock+0x12/0x14
[ 360.398376] [<ffffffff8138c87f>] rtnetlink_rcv+0x11/0x28
[ 360.401292] [<ffffffff813a1d9a>] netlink_unicast+0xe7/0x151
[ 360.404192] [<ffffffff813a2002>] netlink_sendmsg+0x1fe/0x236
[ 360.407089] [<ffffffff8136cd79>] sock_sendmsg+0xea/0x10d
[ 360.409971] [<ffffffff81080679>] ? lock_acquire+0xef/0xfe
[ 360.412825] [<ffffffff810e6bf8>] ? might_fault+0x40/0x90
[ 360.415640] [<ffffffff81080679>] ? lock_acquire+0xef/0xfe
[ 360.418447] [<ffffffff810e6bf8>] ? might_fault+0x40/0x90
[ 360.421239] [<ffffffff8108057e>] ? lock_release+0x175/0x181
[ 360.424039] [<ffffffff810e6c41>] ? might_fault+0x89/0x90
[ 360.426896] [<ffffffff8136b5ec>] ? copy_from_user+0x2a/0x2c
[ 360.429661] [<ffffffff8136e9e5>] sys_sendto+0x12a/0x16c
[ 360.432430] [<ffffffff8107d74f>] ? trace_hardirqs_off_caller
+0x33/0x90
[ 360.435219] [<ffffffff81455515>] ? retint_swapgs+0x13/0x1b
[ 360.437978] [<ffffffff81080a85>] ? trace_hardirqs_on_caller
+0x121/0x158
[ 360.440795] [<ffffffff8121250e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[ 360.443868] [<ffffffff8145acb9>] system_call_fastpath+0x16/0x1b
johannes



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