linux-kernel - Re: Discussion: quick_pit

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Message-ID: <CADyApD0qFvwUzaU-zm7--36eA48BdZQ2ciuj2QhYdjN=yHhLDw@mail.gmail.com>
Date:	Wed, 10 Jun 2015 12:30:08 -0700
From:	Arjan van de Ven <arjanvandeven@...il.com>
To:	George Spelvin <linux@...izon.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>, adrian.hunter@...el.com,
	ak@...ux.intel.com, Matt Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Borislav Petkov <bp@...en8.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>, luto@...capital.net,
	Ingo Molnar <mingo@...nel.org>, penberg@....fi,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: Discussion: quick_pit_calibrate is slow

On Wed, Jun 10, 2015 at 11:38 AM, George Spelvin <linux@...izon.com> wrote:

> 25 ns is 100 ppm of 0.25 ms, so it should be okay if I go use a measurement
> interval of 1 ms or more.
>

ok so we're good, but I suspect we want to put this in a comment
somewhere to prevent someone a year from now thinking they can do 100
usec safely ;-)
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