From: Dave Jones <davej@redhat.com>
To: Bruno Ducrot <ducrot@poupinou.org>
Cc: Cpufreq@lists.linux.org.uk, nemesis@icequake.net
Subject: Re: writing a cpufreq driver
Date: Fri, 22 Sep 2006 11:49:41 -0400 [thread overview]
Message-ID: <20060922154941.GB15032@redhat.com> (raw)
In-Reply-To: <20060922154448.GO4945@poupinou.org>
On Fri, Sep 22, 2006 at 05:44:48PM +0200, Bruno Ducrot wrote:
> > Looking at it again..
> > cpufreq_notify_transition() is calling adjust_jiffies()
> > which should be doing the same thing, so we should be good to go.
> >
> > It looks like feasible that recalibrate_cpu_khz() could actually
> > be killed off.
>
> It's called only at init time because cpu_khz is not
> reliable on some platform due to braindamaged BIOS
> that switch frequency of the K7 onto the SMM handler
> when ACPI enable performance control, breaking AMD
> recommandation at the same time BTW.
Ahh. That deserves a comment. Another alternative would
be to do a transition on startup, which would end up adjusting
it through the notifiers.
Dave
next prev parent reply other threads:[~2006-09-22 15:49 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-21 18:48 writing a cpufreq driver Ryan Underwood
2006-09-21 19:31 ` Dave Jones
2006-09-21 19:38 ` Langsdorf, Mark
2006-09-21 19:47 ` Dave Jones
2006-09-22 15:44 ` Bruno Ducrot
2006-09-22 15:49 ` Dave Jones [this message]
2006-09-21 20:08 ` Ryan Underwood
2006-09-21 20:44 ` Dave Jones
2006-09-21 21:03 ` Ryan Underwood
2006-09-21 21:13 ` Dave Jones
2006-09-22 14:13 ` Ryan Underwood
2006-09-22 14:39 ` Ryan Underwood
2006-09-22 15:48 ` Bruno Ducrot
2006-09-22 16:01 ` Ryan Underwood
2006-09-22 15:51 ` Dave Jones
2006-09-22 15:39 ` Bruno Ducrot
2006-09-22 16:00 ` Ryan Underwood
2006-09-22 16:05 ` Bruno Ducrot
2006-09-22 16:11 ` Ryan Underwood
2006-09-23 15:07 ` Bruno Ducrot
2006-09-23 15:21 ` Ryan Underwood
2006-09-23 15:44 ` Bruno Ducrot
2006-09-23 16:03 ` Ryan Underwood
2006-09-23 16:13 ` Bruno Ducrot
2006-09-25 15:39 ` Ryan Underwood
2006-10-02 2:19 ` Dominik Brodowski
2006-09-25 16:44 ` Ryan Underwood
-- strict thread matches above, loose matches on Subject: below --
2006-09-22 16:31 Erik Slagter
2006-09-23 15:31 ` Bruno Ducrot
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