linux-kernel - Re: CONFIG_NO_HZ: missed ticks, stall (keyb IRQ required) [2.6.18-rc4-mm1]

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Message-ID: <20061114173054.GA27092@rhlx01.hs-esslingen.de>
Date:	Tue, 14 Nov 2006 18:30:54 +0100
From:	Andreas Mohr <andi@...x01.fht-esslingen.de>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Cc:	Len Brown <lenb@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	Andreas Mohr <andi@...x01.fht-esslingen.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org,
	"Van De Ven, Arjan" <arjan.van.de.ven@...el.com>
Subject: Re: CONFIG_NO_HZ: missed ticks, stall (keyb IRQ required) [2.6.18-rc4-mm1]

Hi,

On Tue, Nov 14, 2006 at 09:21:02AM -0800, Pallipadi, Venkatesh wrote:
> >I belive that Venki has looked at some of the HPET enumeration issues,
> >and maybe he has some suggestions.  Is there an example system
> >on-hand where we know Windows works and Linux does not?
> >
> 
> There are two things that can be happening when OS does not see HPET in
> ACPI.
> - BIOS did enable HPET in chipset and did not communicate it to OS.
> - BIOS did nothing to enable HPET in chipset.

I'm sure you've already seen
http://semthex.freeflux.net/blog/archive/2006/10/21/hpet-to-be-or-not-to-be.html
... or not?

Hmm, hopefully it's easy to research where to enable HPET
(if there is one at all!) on an el-cheapo VIA chipset...

Many thanks for your patch! (even though currently Intel-only)

Andreas Mohr
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