Hi Dou,

Have you tested tsc=unstable with your DR setup? Is it working as
expected? I mean instead of previous "notsc"?

Reviewed-by: Pavel Tatashin <[email protected]>

Thank you,
Pavel

On Mon, Oct 9, 2017 at 5:03 AM, Dou Liyang <[email protected]> wrote:
> Commit 8309f86cd41e ("x86/tsc: Provide 'tsc=unstable' boot parameter") adds
> a new parameter 'tsc=unstable', but doesn't add some description to guide
> users.
>
> Append the description of 'tsc=unstable' at the end of 'tsc=' section.
>
> Signed-off-by: Dou Liyang <[email protected]>
> ---
>  Documentation/admin-guide/kernel-parameters.txt | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt 
> b/Documentation/admin-guide/kernel-parameters.txt
> index 9a84483..33e83b6 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -4196,6 +4196,9 @@
>                         Used to run time disable IRQ_TIME_ACCOUNTING on any
>                         platforms where RDTSC is slow and this accounting
>                         can add overhead.
> +                       [x86] unstable: mark tsc clocksource as unstable, this
> +                       marks the TSC unconditionally unstable at bootup and
> +                       avoids any further wobbles once the TSC watchdog 
> notices.
>
>         turbografx.map[2|3]=    [HW,JOY]
>                         TurboGraFX parallel port interface
> --
> 2.5.5
>
>
>
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