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From: Jeremy Kerr <jk@ozlabs.org>
To: cbe-oss-dev@ozlabs.org
Subject: Re: [Cbe-oss-dev] 2.6.26-rc6 kernel bug on PS3?
Date: Thu, 26 Jun 2008 10:46:16 +1000
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Cc: linuxppc-dev@ozlabs.org, Stefan Wald <WALD@de.ibm.com>
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Hi Stefan,

> Application hangs after a while defunct and dmesg output looks like
> d.txt. (See attached file: d.txt)

Looks like this is caused by doing the mmput() while the state mutex is 
held in spu_forget.

In your case, the mm is the final reference to the context, so this is 
resulting in a destroy_spu_context, which requires the state mutex :)

I'm going to take a look at the sequencing of spu_forget, but would like 
to write a test case. Could you tell us about the exit path of your 
program?

Cheers,


Jeremy