Re: [URGENT rfc patch 0/3] tsc clocksource bug fix

[Peter Zijlstra]

On Fri, Jul 05, 2013 at 05:24:09PM +0200, Thomas Gleixner wrote:
> See arch/x86/kernel/tsc.c
> 
> We disable the watchdog for the TSC when tsc_clocksource_reliable is
> set.
> 
> tsc_clocksource_reliable is set when:
> 
>  - you add tsc=reliable to the kernel command line

Ah, I didn't know about that one, useful.

>  - boot_cpu_has(X86_FEATURE_TSC_RELIABLE)
>  
>    X86_FEATURE_TSC_RELIABLE is a software flag, set by vmware and
>    moorsetown. So all other machines keep the watchdog enabled.

Right.. I knew it was enabled on my machines even though they normally
have usable TSC.
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