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List:       linux-kernel
Subject:    Re: [PATCH] x86: Reduce the default HZ value
From:       Alan Cox <alan () lxorguk ! ukuu ! org ! uk>
Date:       2009-05-07 15:12:32
Message-ID: 20090507161232.6e33df34 () lxorguk ! ukuu ! org ! uk
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On Thu, 7 May 2009 10:09:56 -0400 (EDT)
Christoph Lameter <cl@linux.com> wrote:

> On Tue, 5 May 2009, Alan Cox wrote:
> 
> > HZ on a tickless system has no meaningful relationship to wakup rates -
> > which are what I assume you actually care about.
> 
> Linux is not tickless. It only switches off ticks if a processor is idle.

Hooray - finally someone admits the *real* problem here, and for power
management too. Otherwise known as "referencing jiffies as a variable must
die"

Alan
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