linux-kernel - Re: INFO: task khubd:271 blocked for more than 120 seconds.

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Message-Id: <201006161022.32398.oneukum@suse.de>
Date:	Wed, 16 Jun 2010 10:22:32 +0200
From:	Oliver Neukum <oneukum@...e.de>
To:	roma1390 <roma1390@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: INFO: task khubd:271 blocked for more than 120 seconds.

Am Mittwoch, 16. Juni 2010 10:03:42 schrieb roma1390:
> Hello,
> 
> 
> We got this on our production system. Kernel: 2.6.26-2-amd64.
> This seems to be related with http://bugzilla.kernel.org/show_bug.cgi?id=13316 and still is open. Sadly to have such long standing bugs in common used subsystems like USB.
> 
> Jun 15 06:25:01 accelerator57 kernel: imklog 3.18.6, log source = /proc/kmsg started.
> Jun 16 00:36:55 accelerator57 kernel: [600606.885265] usb 6-1: USB disconnect, address 3
> Jun 16 00:39:02 accelerator57 kernel: [600738.152638] INFO: task khubd:271 blocked for more than 120 seconds.
> Jun 16 00:39:02 accelerator57 kernel: [600738.152682] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> Jun 16 00:39:02 accelerator57 kernel: [600738.155993] khubd         D ffff810916ca1400     0   271      2
> Jun 16 00:39:02 accelerator57 kernel: [600738.156038]  ffff810919523d50 0000000000000046 363030365b3e363c 36323538382e3630
> Jun 16 00:39:02 accelerator57 kernel: [600738.156118]  ffff810919521470 ffff810916dad220 ffff8109195216f8 00000000a00745a2
> Jun 16 00:39:02 accelerator57 kernel: [600738.156197]  ffff810919523da4 ffff810916ca1600 0000000000000286 ffff8109148851c0
> Jun 16 00:39:02 accelerator57 kernel: [600738.156245] Call Trace:
> Jun 16 00:39:02 accelerator57 kernel: [600738.156308]  [<ffffffff8039035a>] usb_kill_urb+0xa8/0xdb
> Jun 16 00:39:02 accelerator57 kernel: [600738.156612]  [<ffffffff80246111>] autoremove_wake_function+0x0/0x2e
> Jun 16 00:39:02 accelerator57 kernel: [600738.156660]  [<ffffffff8038fa32>] usb_hcd_flush_endpoint+0xd4/0xeb
> Jun 16 00:39:02 accelerator57 kernel: [600738.156707]  [<ffffffff80390a8e>] usb_disable_endpoint+0x5b/0x6d
> Jun 16 00:39:02 accelerator57 kernel: [600738.156752]  [<ffffffff80390ac5>] usb_disable_device+0x25/0xe8
> Jun 16 00:39:02 accelerator57 kernel: [600738.156792]  [<ffffffff8038c9cd>] usb_disconnect+0x92/0x142
> Jun 16 00:39:02 accelerator57 kernel: [600738.156830]  [<ffffffff8038dc07>] hub_thread+0x3f9/0xcfd
> Jun 16 00:39:02 accelerator57 kernel: [600738.156868]  [<ffffffff80246111>] autoremove_wake_function+0x0/0x2e
> Jun 16 00:39:02 accelerator57 kernel: [600738.156910]  [<ffffffff8038d80e>] hub_thread+0x0/0xcfd
> Jun 16 00:39:02 accelerator57 kernel: [600738.156952]  [<ffffffff80245feb>] kthread+0x47/0x74
> Jun 16 00:39:02 accelerator57 kernel: [600738.156993]  [<ffffffff8023008d>] schedule_tail+0x27/0x5c
> Jun 16 00:39:02 accelerator57 kernel: [600738.157036]  [<ffffffff8020cf38>] child_rip+0xa/0x12
> Jun 16 00:39:02 accelerator57 kernel: [600738.157077]  [<ffffffff80245fa4>] kthread+0x0/0x74
> Jun 16 00:39:02 accelerator57 kernel: [600738.157116]  [<ffffffff8020cf2e>] child_rip+0x0/0x12
> Jun 16 00:39:02 accelerator57 kernel: [600738.157154]

Under which conditions did you get this? Physical unplug, S3 or S4?

	Regards
		Oliver
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