linux-kernel - Re: [Cbe-oss-dev] [PATCH -- RFC]Add notification for active Cell SPU tasks -- update #2

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Message-ID: <45A2E615.5020900@us.ibm.com>
Date:	Mon, 08 Jan 2007 18:47:17 -0600
From:	Maynard Johnson <maynardj@...ibm.com>
To:	Maynard Johnson <maynardj@...ibm.com>
CC:	cbe-oss-dev@...abs.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, oprofile-list@...ts.sourceforge.net
Subject: Re: [Cbe-oss-dev] [PATCH -- RFC]Add notification for active Cell
 SPU tasks	-- update #2

The attached patch adds notification of already-active SPU tasks to 
SPUFS.  However, there's a bug that I'm having trouble finding.  The 
first execution of this code path works fine, but subsequent runs do not 
work properly.  On subsequent runs, I can see that not all of the 
already-active tasks are getting awakened, so my OProfile driver is not 
able to collect samples for those SPU contexts that were not awakened.  
If anyone can see the error in my logic or if you have any other 
comments on this patch, I would appreciate it.

Thanks.

Maynard

View attachment "spu-notifier.patch" of type "text/x-diff" (5231 bytes)