linux-kernel - Re: Long timeout when booting >= 2.6.38

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Message-ID: <1304470839.3037.12.camel@work-vm>
Date:	Tue, 03 May 2011 18:00:39 -0700
From:	john stultz <johnstul@...ibm.com>
To:	Christian Hoffmann <email@...istianhoffmann.info>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Long timeout when booting >= 2.6.38

On Tue, 2011-05-03 at 00:27 +0200, Christian Hoffmann wrote:
> On 05/02/2011 11:49 PM, john stultz wrote:
> > On Mon, 2011-05-02 at 22:42 +0200, Christian Hoffmann wrote:
> >> Hi,
> >>
> >>> Hrm. So, on older kernels, what do you see from:
> >>> $ cat /sys/devices/system/clocksource/clocksource0/current_clocksource
> >>> $ cat /sys/devices/system/clocksource/clocksource0/available_clocksource
> >>
> >> On older and newer kernel I see the same output:
> >> $ cat /sys/devices/system/clocksource/clocksource0/current_clocksource
> >> tsc
> >> $ cat /sys/devices/system/clocksource/clocksource0/available_clocksource
> >> tsc hpet acpi_pm
> >
> > Can you reproduce the hang booting with "clocksource=hpet" and
> > "clocksource=acpi_pm" ?
> 
> Both hang also.

Sorry, one more clarifying point here:

When you used either clocksource=hpet/clocksource=acpi_pm did the
behavior of the system seem different after booting? In other words:
does running time waiting a few seconds and then running time again show
the expected passage of time?  Were any following hangs seen, or was it
only the first one at boot?



thanks
-john


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