linux-kernel - Re: [PATCH 1/7] ICH Force HPET: Make generic time capable of switching broadcast timer

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Message-Id: <20070623095215.f882f1cb.akpm@linux-foundation.org>
Date:	Sat, 23 Jun 2007 09:52:15 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Venki Pallipadi <venkatesh.pallipadi@...el.com>
Cc:	linux-kernel@...r.kernel.org, tglx@...utronix.de
Subject: Re: [PATCH 1/7] ICH Force HPET: Make generic time capable of
 switching broadcast timer

> On Fri, 22 Jun 2007 13:38:22 -0700 Venki Pallipadi <venkatesh.pallipadi@...el.com> wrote:
> Auto-detect the presence of HPET on ICH5 or newer platforms and enable
> HPET for broadcast timer. This gives a bigger upperlimit for tickless time
> tick and improves the power consumption in comparison to PIT as broadcast timer.
> 
> This patch:
> 
> Change the broadcast timer, if a timer with higher rating becomes available.
> 

so...  is this the mysterious patchset which will get NOHZ working
on my little Vaio?

I _think_ what's going on here is that your code will go and poke the
hardware to enable the hpet even f the BIOS decided to hide its presence. 
Is that correct?  If so, perhaps the changelog should mention this
explicitly.

> Applies over linux-2.6.22-rc4-mm2 +
> tglx's  patch-2.6.22-rc4-mm2-hrt4 patch

Oh.  Well that tears that then.

Thomas, can I assume that you'll send all this stuff back at me?
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