From: Ingo Molnar <mingo@elte.hu>
To: Dave Jones <davej@codemonkey.org.uk>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
cpufreq@vger.kernel.org, Alok Kataria <akataria@vmware.com>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [BUG] cpufreq: constant cpu_khz
Date: Mon, 25 Aug 2008 19:57:12 +0200 [thread overview]
Message-ID: <20080825175712.GA10848@elte.hu> (raw)
In-Reply-To: <20080825175547.GA26131@codemonkey.org.uk>
* Dave Jones <davej@codemonkey.org.uk> wrote:
> > hm, that too is due to the tsc.c unification - Alok Cc:-ed. Applied
> > your fix to x86/urgent.
>
> ACKed-by: Dave Jones <davej@redhat.com>
>
> Good catch Peter. I'm puzzled how that bug was latent on 64bit for so
> long with no-one realising though.
i think it's the combination of these two factors:
- bootup frequently is typically full-speed, so we calibrate things
right
- cpufreq events are relatively slow-scale - and when they trigger the
system is definitely not under load. So how precisely the scheduler
functions isnt all that important in such scenarios - there's tons of
CPU power available.
but it's indeed nice to have this fixed, and i just pushed the fix to
Linus.
Ingo
next prev parent reply other threads:[~2008-08-25 17:57 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-25 6:33 [BUG] cpufreq: constant cpu_khz Peter Zijlstra
2008-08-25 11:35 ` Peter Zijlstra
2008-08-25 12:39 ` Ingo Molnar
2008-08-25 17:34 ` Alok Kataria
2008-08-25 17:55 ` Dave Jones
2008-08-25 17:57 ` Ingo Molnar [this message]
2008-08-25 18:22 ` Arjan van de Ven
2008-08-25 19:27 ` Peter Zijlstra
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