linux-kernel - Re: [PATCH] x86-64 highres/dyntick support 2.6.22-rc1-v5

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Message-ID: <464B5FF7.5070701@tuxrocks.com>
Date:	Wed, 16 May 2007 14:48:07 -0500
From:	Frank Sorenson <frank@...rocks.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>,
	john stultz <johnstul@...ibm.com>, Ingo Molnar <mingo@...e.hu>,
	Chris Wright <chrisw@...s-sol.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>, Andi Kleen <ak@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alistair John Strachan <s0348365@....ed.ac.uk>
Subject: Re: [PATCH] x86-64 highres/dyntick support 2.6.22-rc1-v5

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Thomas Gleixner wrote:
> I'm pleased to announce an updated version of the x86_64 highres/dyntick
> support patches against 2.6.22-rc1:
> 
> http://www.tglx.de/projects/hrtimers/2.6.22-rc1/linux-2.6.22-rc1-x86_64-highres-v5.patch
> 
> Broken out version is available here:
> http://www.tglx.de/projects/hrtimers/2.6.22-rc1/linux-2.6.22-rc1-x86_64-highres-v5.patches.tar.bz2
> 
> Changes since the last version:
> 
> - Enforced enabling of HPET (Venki Pallipadi)
> 	Detects and enables HPET on Intel ICHx chipsets, when the BIOS
> 	hides it.
> 
> 	Venki, great work, thanks !
> 
> - Another variant of PIT wreckage fixup
> 	Frank, does this one work for you ?

Unfortunately, no.

After adding *lots* of early_printks, I see that it hangs in
hpet_is_known(hdp) called from hpet_alloc(&hd), so something in the hpet
code is still buggy.  Adding nohpet to the kernel command line allows it
to boot correctly.

Frank
- --
Frank Sorenson - KD7TZK
Linux Systems Engineer, DSS Engineering, UBS AG
frank@...rocks.com
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