linux-kernel - Re: [4/5] 2.6.21-rc4: known regressions (v2)

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Date:	Sun, 25 Mar 2007 12:27:38 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"Michael S. Tsirkin" <mst@....mellanox.co.il>
Cc:	Adrian Bunk <bunk@...sta.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Soeren Sonnenburg <kernel@....de>, Ingo Molnar <mingo@...e.hu>,
	Tejun Heo <htejun@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	John Stultz <johnstul@...ibm.com>
Subject: Re: [4/5] 2.6.21-rc4: known regressions (v2)

On Sun, 2007-03-25 at 12:15 +0200, Michael S. Tsirkin wrote:
> > Quoting Thomas Gleixner <tglx@...utronix.de>:
> > Subject: Re: [4/5] 2.6.21-rc4: known regressions (v2)
> > 
> > On Sun, 2007-03-25 at 10:57 +0200, Michael S. Tsirkin wrote:
> > > > Can you please test the following:
> > > > 
> > > > Add "clocksource=acpi_pm" to the kernel commandline.
> > > > 
> > > > If this does not change anything, then disable CONFIG_HPET and retry.
> > > 
> > > I have:
> > > $ grep CONFIG_HPET .config
> > > CONFIG_HPET_TIMER=y
> > > CONFIG_HPET_EMULATE_RTC=y
> > > # CONFIG_HPET is not set
> > > 
> > > so I think all these tests were done with CONFIG_HPET=n.
> > 
> > Gack. Please turn off CONFIG_HPET_TIMER and CONFIG_HPET_EMULATE_RTC
> 
> Okay ... although they are in defconfig for i386, and they did not create
> problems in 2.6.20.

I know, but we are looking for a regression and the hpet related code
_has_ changed.

> > > Given this, does it still make sense to test clocksource=acpi_pm?
> > 
> > Yes.
> 
> With or without CONFIG_HPET_TIMER?

with, as a first test.

	tglx


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