From mboxrd@z Thu Jan  1 00:00:00 1970
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: RE: [patch 0/4] [RFC] true vs. system idle cputime
Date: Thu, 09 Oct 2008 10:03:58 +0200
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To: "Luck, Tony" <tony.luck@intel.com>
Cc: "linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>, Heiko Carstens <heiko.carstens@de.ibm.com>, Paul Mackerras <paulus@samba.org>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>, Jeremy Fitzhardinge <jeremy@xensource.com>, Chris Wright <chrisw@sous-sol.org>, Michael Neuling <mikey@neuling.org>

On Wed, 2008-10-08 at 14:22 -0700, Luck, Tony wrote:
> > There is one change in patch #2 that might require a change on powerpc
> > and/or ia64. The generic TICK_ONESHOT/NO_HZ code calculates the number
> > of ticks spent with a disabled HZ timer and accounts this as idle time.
> 
> Your patches apply, build and boot cleanly on ia64.
> 
> At the moment ia64 doesn't do NO_HZ (exisiting cpus only support a C1
> state, which we can enter/leave pretty quickly ... so power saving
> for NO_HZ is negligible) ... so your code change isn't an issue for
> ia64.

Thanks for checking.

-- 
blue skies,
  Martin.

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