From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: "Pasi Kärkkäinen" <pasik@iki.fi>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Stefan Bader <stefan.bader@canonical.com>,
Jan Beulich <jbeulich@suse.com>
Subject: Re: Workings/effectiveness of the xen-acpi-processor driver
Date: Mon, 7 May 2012 13:33:06 -0400 [thread overview]
Message-ID: <20120507173306.GC17704@phenom.dumpdata.com> (raw)
In-Reply-To: <20120506152341.GX2058@reaktio.net>
On Sun, May 06, 2012 at 06:23:41PM +0300, Pasi Kärkkäinen wrote:
> On Thu, Apr 26, 2012 at 01:04:26PM -0400, Konrad Rzeszutek Wilk wrote:
> > > >>
> > > >> This I would take as C3 and C6 really not being used and the frequency scaling
> > > >
> > > > To go in deeper modes there is also a need to backport a Xen unstable
> > > > hypercall which will allow the kernel to detect the other states besides
> > > > C0-C2.
> > > >
> > > > "XEN_SET_PDC query was implemented in c/s 23783:
> > > > "ACPI: add _PDC input override mechanism".
> > > >
> > >
> > > I see. There is a kernel patch about enabling MWAIT that refers to that...
> >
> > Yeah, I should see about back-porting it in Xen 4.1..
> >
>
> Should this patch be backported and merged to xen-4.1-testing.hg for Xen 4.1.3 release ?
It is a new feature so no. Which does mean that the MWAIT states won't be uploaded
to the hypervisor. But the legacy ones (so the ones that are in the ACPI _CST)
are still uploaded. And TurboMode kicks in without the MWAIT states.
next prev parent reply other threads:[~2012-05-07 17:33 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-25 13:00 Workings/effectiveness of the xen-acpi-processor driver Stefan Bader
2012-04-26 15:50 ` Konrad Rzeszutek Wilk
2012-04-26 16:25 ` Stefan Bader
2012-04-26 17:04 ` Konrad Rzeszutek Wilk
2012-05-06 15:23 ` Pasi Kärkkäinen
2012-05-07 17:33 ` Konrad Rzeszutek Wilk [this message]
2012-05-07 17:44 ` Pasi Kärkkäinen
2012-05-01 20:02 ` Konrad Rzeszutek Wilk
2012-05-01 22:35 ` Boris Ostrovsky
2012-05-01 22:54 ` Konrad Rzeszutek Wilk
2012-05-02 0:47 ` Konrad Rzeszutek Wilk
2012-05-02 1:11 ` Boris Ostrovsky
2012-05-02 9:19 ` Jan Beulich
2012-05-02 14:56 ` Stefan Bader
2012-05-02 8:36 ` Stefan Bader
2012-05-02 15:01 ` Stefan Bader
2012-05-02 16:08 ` Konrad Rzeszutek Wilk
2012-05-02 17:06 ` Boris Ostrovsky
2012-05-02 17:14 ` Konrad Rzeszutek Wilk
2012-05-02 21:31 ` Boris Ostrovsky
2012-05-02 21:41 ` Konrad Rzeszutek Wilk
2012-05-02 22:09 ` Boris Ostrovsky
2012-05-03 6:55 ` Stefan Bader
2012-05-03 10:00 ` Stefan Bader
2012-05-03 12:58 ` Stefan Bader
2012-05-03 14:47 ` Stefan Bader
2012-05-03 15:46 ` Konrad Rzeszutek Wilk
2012-05-03 17:02 ` Boris Ostrovsky
2012-05-03 17:08 ` Konrad Rzeszutek Wilk
2012-05-04 8:00 ` Stefan Bader
2012-05-03 16:14 ` Konrad Rzeszutek Wilk
2012-05-02 21:29 ` Stefan Bader
2012-05-02 8:22 ` Stefan Bader
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