linux-kernel - Re: [patch 0/2] NOHZ vs. profile/oprofile v2

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Message-ID: <20100302162514.2548e185@mschwide.boeblingen.de.ibm.com>
Date:	Tue, 2 Mar 2010 16:25:14 +0100
From:	Martin Schwidefsky <schwidefsky@...ibm.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Robert Richter <robert.richter@....com>
Cc:	Aaro Koskinen <aaro.koskinen@...ia.com>,
	Ingo Molnar <mingo@...e.hu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rob van der Heij <rvdheij@...il.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	john stultz <johnstul@...ibm.com>,
	Andi Kleen <andi@...stfloor.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, robert.richter@....com
Subject: Re: [patch 0/2] NOHZ vs. profile/oprofile v2

On Tue, 2 Mar 2010 16:08:09 +0100 (CET)
Thomas Gleixner <tglx@...utronix.de> wrote:

> On Tue, 2 Mar 2010, Martin Schwidefsky wrote:
> 
> > On Tue, 02 Mar 2010 15:57:22 +0200
> > Aaro Koskinen <aaro.koskinen@...ia.com> wrote:
> > 
> > > Hi,
> > > 
> > > Martin Schwidefsky wrote:
> > > > First version of the hrtimer patch for oprofile. I did not add the
> > > > sysctl yet, if the sysctl is added in oprofile_timer_init it would not
> > > > be available if some better profiling source is available. If it is
> > > > added unconditionally it would only have an effect if the timer
> > > > fallback is used. Both cases are not exactly nice for a user space
> > > > interface.
> > > 
> > > I wonder what happened to this patch? Some platforms would need
> > > this fix (i.e. the timer mode has to be used due to HW issues).
> > 
> > After SH removed their oprofile hook there is nothing left that would
> > prevent us from converting oprofile to hrtimer. Just a matter of
> > reminding me and have me try again ;-)
> > 
> > Patch against current git. Ingo, Thomas: one for the timer tree I guess.
> 
> No objections from my side, but shouldn't that go via Robert ?

Agreed, this should be handled by the oprofile maintainer.
Robert, could you take care of the patch?

-- 
blue skies,
   Martin.

"Reality continues to ruin my life." - Calvin.

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