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SubjectRE: [PATCH v2 0/2] x86/delay: Introduce TPAUSE instruction
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Hi Thomas,

> -----Original Message-----
> From: Thomas Gleixner <tglx@linutronix.de>
> Sent: Friday, March 20, 2020 2:57 AM
> To: Park, Kyung Min <kyung.min.park@intel.com>; x86@kernel.org; linux-
> kernel@vger.kernel.org
> Cc: mingo@redhat.com; hpa@zytor.com; gregkh@linuxfoundation.org;
> ak@linux.intel.com; Luck, Tony <tony.luck@intel.com>; Raj, Ashok
> <ashok.raj@intel.com>; Shankar, Ravi V <ravi.v.shankar@intel.com>; Yu,
> Fenghua <fenghua.yu@intel.com>; Park, Kyung Min
> <kyung.min.park@intel.com>
> Subject: Re: [PATCH v2 0/2] x86/delay: Introduce TPAUSE instruction
>
> Hi!
>
> Kyung Min Park <kyung.min.park@intel.com> writes:
>
> > Intel processors that support the WAITPKG feature implement the TPAUSE
> > instruction that suspends execution in a lower power state until the
> > TSC (Time Stamp Counter) exceeds a certain value.
> >
> > Update the udelay() function to use TPAUSE on systems where it is
> > available. Note that we hard code the deeper (C0.2) sleep state
> > because exit latency is small compared to the "microseconds"
> > that usleep() will delay.
> >
> > ChangeLog:
> > - Change from v1 to v2:
> > 1. The patchset applies after Thomas's cleanup patch as below:
> > https://lkml.org/lkml/diff/2020/3/18/893/1
>
> lkml.org is horrible. Please use lore.kernel.org if at all.

Let me change in the next patch.

> Also please just add the patch to the series when posting so that people don't
> have to go through loops and hoops to grab that dependency.

Sure, Let me add this patch to the series.

> Thanks,
>
> tglx
>

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