From: Dave Jones <davej@redhat.com>
To: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
Cc: Wes Felter <wesley@felter.org>, linux-kernel@vger.kernel.org
Subject: Re: em64t speedstep technology not supported in kernel yet?
Date: Fri, 30 Sep 2005 09:25:44 -0400 [thread overview]
Message-ID: <20050930132544.GC15658@redhat.com> (raw)
In-Reply-To: <88056F38E9E48644A0F562A38C64FB6005DECA9D@scsmsx403.amr.corp.intel.com>
On Fri, Sep 30, 2005 at 06:20:15AM -0700, Pallipadi, Venkatesh wrote:
> Actually, speedstep-centrino works in two modes. One OP()
> table based mode and the other ACPI table based mode. So,
> BIOS ACPI tables do matter for the second mode and things
> work without a static OP table.
True. Ack, I've spent too much time playing with that driver
and broken BIOS's lately, that I'd forgotten about this. :)
> In this particular case though, for Xeon with Enhanced Speedstep,
> acpi-cpufreq should be the driver of choice as there is a need
> for coordination of HT siblings, which happen in BIOS at the
> moment with most BIOSes. That is the reason, I want to make
> sure BIOS supports Enhanced Speedstep in this case.
Ok, that makes sense.
Dave
next prev parent reply other threads:[~2005-09-30 13:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-30 13:20 em64t speedstep technology not supported in kernel yet? Pallipadi, Venkatesh
2005-09-30 13:25 ` Dave Jones [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-09-30 12:20 Pallipadi, Venkatesh
2005-09-30 13:04 ` Dave Jones
2005-09-29 16:34 Richard Wohlstadter
2005-09-29 18:58 ` Wes Felter
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