linux-kernel - Debugging uninterruptible sleep causing drivers

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Message-ID: <8bf247760711190509s20527d86nd79dcf7a9b8b9095@mail.gmail.com>
Date:	Mon, 19 Nov 2007 18:39:03 +0530
From:	Ram <vshrirama@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Debugging uninterruptible sleep causing drivers

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.

Please do advice,

Regards,
sriram
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