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Re: [GIT pull] x86/timers updates for 4.13

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  Re: [GIT pull] x86/timers updates for 4.13 Linus Torvalds <torvalds@linux-foundation.org> - 2017-07-04 03:10 +0200
    Re: [GIT pull] x86/timers updates for 4.13 Thomas Gleixner <tglx@linutronix.de> - 2017-07-04 09:30 +0200

#1680630 — Re: [GIT pull] x86/timers updates for 4.13

On Mon, Jul 3, 2017 at 1:20 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
>
> This update contains:
>
>    - The final solution for the TSC deadline timer borkage, which is caused
>      by a hardware problem in the TSC_ADJUST/TSC_DEADLINE_TIMER logic.
>
>      The problem is documented now fixed with a microcode update, so we can
>      remove the workaround and check for the microcode version. If the
>      microcode is not up to date, then the TSC deadline timer is
>      enabled. If the borkage is fixed by the proper micro code version,
>      then the deadline timer can be used. In both cases the restrictions to
>      the range of the TSC_ADJUST value, which were added as workarounds,
>      are removed.
>
>   - A few simple fixes and updates to the timer related x86 code.

That deadline timer explanation made no sense.

I edited it to what I think you wanted to say in the commit message.

               Linus

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#1680715

On Mon, 3 Jul 2017, Linus Torvalds wrote:
> On Mon, Jul 3, 2017 at 1:20 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
> >
> > This update contains:
> >
> >    - The final solution for the TSC deadline timer borkage, which is caused
> >      by a hardware problem in the TSC_ADJUST/TSC_DEADLINE_TIMER logic.
> >
> >      The problem is documented now fixed with a microcode update, so we can
> >      remove the workaround and check for the microcode version. If the
> >      microcode is not up to date, then the TSC deadline timer is
> >      enabled. If the borkage is fixed by the proper micro code version,
> >      then the deadline timer can be used. In both cases the restrictions to
> >      the range of the TSC_ADJUST value, which were added as workarounds,
> >      are removed.
> >
> >   - A few simple fixes and updates to the timer related x86 code.
> 
> That deadline timer explanation made no sense.

Indeed. Sorry.

> I edited it to what I think you wanted to say in the commit message.

Yes. Thank you for fixing it up!

     tglx

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