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Message-id: <47C24517.7010204@shaw.ca>
Date:	Sun, 24 Feb 2008 22:33:27 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Gabriel C <nix.or.die@...glemail.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Gabriel C <crazy@...galware.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Clocksource tsc is always unstable with 2.6.25-* kernels and
 CONFIG_NO_HZ=y on my box

Gabriel C wrote:
> Hi,
> 
> I noticed tsc is always marked unstable on my box with 2.6.25* , 2.6.24 is fine.
> 
> ..
> 
> [    0.825760] ACPI: PCI Interrupt 0000:03:0e.0[A] -> GSI 22 (level, low) -> IRQ 22
> [    0.805755] Switched to high resolution mode on CPU 1
> [    0.794244] Switched to high resolution mode on CPU 2
> [    0.766968] Switched to high resolution mode on CPU 3
> [    1.083944] Switched to high resolution mode on CPU 0
> [   15.388792] Clocksource tsc unstable (delta = 9373391604 ns)
> [   15.714648] Time: acpi_pm clocksource has been installed.
> 
> ..
> 
> Booting nohz=off fixes that.
> 
> Another strange thing is when I try to boot that kernel with clocksource=acpi_pm it just hangs.
> 
> config is attached.
> 
> Please let me know if you need more infos / want me to try patches or anything else.

Please post your full dmesg output.
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