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Date: Tue, 31 May 2011 14:18:26 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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To: Jung-uk Kim <jkim@FreeBSD.org>
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Cc: freebsd-hackers@FreeBSD.org
Subject: Re: [RFC] Enabling invariant TSC timecounter on SMP
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on 24/05/2011 20:56 Jung-uk Kim said the following:
> I think it's about time to enable invariant TSC timecounter on SMP by 
> default.  Please see the attached patch.  It is also available from 
> here:
> 
> http://people.freebsd.org/~jkim/tsc_smp_test4.diff
> 
> avg convinced me enough that it should be an opt-out feature going 
> forward. :-)

Not sure if I really did that.
My position is this:
- if we think that TSC is SMP-safe then it should have the best priority
- we should do our best to auto-guess if TSC is SMP-safe unless a user explicitly
overrides that property (either via explicit testing or by making guesses based on
CPU model or etc)

> Comments?

Perhaps I missed it, but I don't remember the "lowres" part of the patch being
discussed.

-- 
Andriy Gapon