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

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Date:	Wed, 16 Jun 2010 10:30:35 +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 10:27:22 schrieb roma1390:
> Hello,
> 
> Oliver Neukum wrote:
> > 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.
> >>
> > 
> > Under which conditions did you get this? Physical unplug, S3 or S4?
> > 
> > 	Regards
> > 		Oliver
> 
> this was normal operation (no unplug, no S3 or something like that). This is on-line
> server. There is posible issue with usb device itself or physical usb port. Which
> sometimes causes device disconections, reconnections.
> 
> Of course it's posible to fix on hardware level, but OS can't do such nasty things also.

Yes, this is a kernel bug. It would be helpful to have a bit more of context.
Could you post a bit more of your dmesg before the oops?

	Regards
		Oliver
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