Re: [Linux-ia64] [BUG] perfmon doesn't send SIGPROF in kernel 2.5.64

From: Stephane Eranian <eranian_at_hpl.hp.com>
Date: 2003-04-17 07:50:33
Eric,

On Fri, Apr 11, 2003 at 04:33:33PM +0200, Eric Piel wrote:
> > Let me know how it goes, especially on SMP.
> For now I would say it doesn't work :-( I get the same results from
> realfeel4 than before.

Yes, it does not work. I found the source of the problem and it is 
pretty subtle especially in system-wide mode. The deferred notification
does not work with kernel only threads which is likely what you have 
running in system-wide mode with a mostly idle system.

The attached patch against 2.5.67 corrects the problem. Note that this
patch also includes other updates.

Let me know how it goes.

-- 
-Stephane



Received on Wed Apr 16 14:52:21 2003

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