linux-kernel - Re: Debugging uninterruptible sleep causing drivers

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Message-ID: <20071119083815.4e520c83@laptopd505.fenrus.org>
Date:	Mon, 19 Nov 2007 08:38:15 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Ram <vshrirama@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Debugging uninterruptible sleep causing drivers

On Mon, 19 Nov 2007 18:39:03 +0530
Ram <vshrirama@...il.com> wrote:

> Hi,
>    Would like some advices on how to debug a driver which causes a
> processes to go into
> uninterruptible sleep.
> 
> Am trying to debug a  bug which makes my video driver to go into
> an sleep/busywaiting. (when i do 'ps -l' find a 'D' in the stat
> field).
> 
> 99% of the time the driver works,
> 
> However when i try to run both the video and the audio
> driver.(streaming audio and video)
> The video driver sometimes goes into busywaiting/sleep.
> 
> My driver contains lots of spinlocks and semaphores. I have no clue
> on how to solve this issues.
> 

it starts by posting a URL to the (full) source code... without that..
how are people supposed to help you?


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