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Subject: Re: Dynamic tick for 2.6.14 - what's the plan?
From: Arjan van de Ven <arjan@infradead.org>
To: Tony Lindgren <tony@atomide.com>
Cc: Alistair John Strachan <s0348365@sms.ed.ac.uk>,
       Con Kolivas <kernel@kolivas.org>, "Theodore Ts'o" <tytso@mit.edu>,
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Date: Wed, 31 Aug 2005 10:39:26 +0200
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On Wed, 2005-08-31 at 10:44 +0300, Tony Lindgren wrote:
> * Alistair John Strachan <s0348365@sms.ed.ac.uk> [050830 18:57]:
> > On Tuesday 30 August 2005 13:31, Tony Lindgren wrote:
> > [snip]
> > > >
> > > > Same issue, it's waiting on dynticks before being reworked.
> > >
> > > Also one more minor issue; Dyntick can cause slow boots with dyntick
> > > enabled from boot because the there's not much in the timer queue
> > > until init.
> > >
> > > This probably does not show up much on x86 though because of the
> > > short hardware timers.
> > 
> > You could disable it until jiffies >= 0; this covers the boot criteria and 
> > still allows for moderate savings post boot (though maybe on embedded systems 
> > the delay is too long?).
> 
> Yeah, that's true. Or just enable it from an init script via sysfs.

ehh
why does it cause slow boots?
if that kind of behavior changes... isn't that a sign there is a
fundamental bug still ?