Date: Tue, 21 Aug 2007 12:07:17 +0200
From: Andi Kleen <andi@firstfloor.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <andi@firstfloor.org>,
       Martin Schwidefsky <schwidefsky@de.ibm.com>,
       Christian Borntraeger <borntraeger@de.ibm.com>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
       Jan Glauber <jang@linux.vnet.ibm.com>, heiko.carstens@de.ibm.com,
       Paul Mackerras <paulus@samba.org>
Subject: Re: [accounting regression since rc1]  scheduler updates
Message-ID: <20070821100717.GA692@one.firstfloor.org>
References: <20070812163225.GA11996@elte.hu> <200708141037.48001.borntraeger@de.ibm.com> <20070820154529.GA300@elte.hu> <1187629438.8541.40.camel@localhost> <20070820180810.GA25160@elte.hu> <p73lkc5zl2m.fsf@bingen.suse.de> <20070821070922.GA16695@elte.hu>
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On Tue, Aug 21, 2007 at 09:09:22AM +0200, Ingo Molnar wrote:
> 
> * Andi Kleen <andi@firstfloor.org> wrote:
> 
> > You should just be using idle notifiers instead instead of adding more 
> > and more custom hooks (like NOHZ has already) x86-64 still has them 
> > and there is a old patch around to add them to i386.
> 
> these are specially placed callbacks that we want to call from certain 
> ACPI codepaths but not from all of them.

Because you believe TSC only stops in C2 and C3? That's not correct on
all systems.

-Andi
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