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SubjectRe: [PATCH] x86: hpet: Don't default CONFIG_HPET_TIMER to be y for X86_64
On 03/27/2014 04:02 AM, Clemens Ladisch wrote:
> Feng Tang wrote:
>> On many new phone/tablet platforms like Baytrail/Merrifield etc,
>> the HPET are either defeatured or has some problem to be used
>> as a reliable timer. As these platforms also have X86_64, we
>> should not make HPET_TIMER default y for all X86_64.

Wouldn't it be better to fix the hpet driver so that the hpet doesn't
used on these platforms?

>
> The help text still says:
> | You can safely choose Y here. [...]
> | Choose N to continue using the legacy 8254 timer.
>
> Are these statements still true for those platforms?

They aren't true for modern desktop and server platforms -- the TSC is
used regardless of hpet availability.

>
>
> Regards,
> Clemens
>



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