linux-kernel - Re: 2.6.28-rc9: oprofile regression

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Date:	Fri, 16 Jan 2009 12:29:53 +0100
From:	Tim Blechmann <tim@...ngt.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Andi Kleen <ak@...ux.intel.com>, oprofile-list@...ts.sf.net,
	linux-kernel@...r.kernel.org,
	Robert Richter <robert.richter@....com>,
	venkatesh.pallipadi@...el.com
Subject: Re: 2.6.28-rc9: oprofile regression

On Fri, 2009-01-16 at 09:59 +0100, Thomas Gleixner wrote:
> On Fri, 16 Jan 2009, Tim Blechmann wrote:
> > > Hmm, that confuses the hell out of me. Can you try the patch
> below,
> > > which restores the original code of writing the counter
> registers ?
> > 
> > no difference ... i must admit, i already spent some time, trying to
> > revert the specific changes of this commit ... i gave up to wait for
> > some help from someone, who actually knows how the code is
> working ...
> > 
> > possibly it makes sense to compile a full kernel of the first bad
> kommit
> > and introduce the different changes one by one ... i will try to
> find
> > some time for this during the next few days ...
> > 
> > but if you have more patches, that i can test, please let me
> know ...
> 
> Here is another one, which also reverts the counter reset code and
> disables the cpuid(0xa) call. 

i applied the patch, no difference

> Can you verify that counters are set up
> ? 

sorry for my ignorance, but how?

> Can you please provide me your .config ? 

attached

> What's your kernel command
> line ?

nothing fancy, just the ubuntu default:
root=UUID=7b58a11b-972a-4a67-909a-b8e48cb29da5 ro quiet splash 

--
tim@...ngt.org
http://tim.klingt.org

Just what the hell is the experimental tradition?
  Morton Feldman

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