From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>, Avi Kivity <avi@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Suresh Siddha <suresh.b.siddha@intel.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [patch 0/2] x2apic optimization, round 4
Date: Mon, 02 May 2011 11:52:26 +0400 [thread overview]
Message-ID: <4DBE62BA.6060306@gmail.com> (raw)
In-Reply-To: <20110502074524.GD18376@redhat.com>
On 05/02/2011 11:45 AM, Gleb Natapov wrote:
> On Mon, May 02, 2011 at 11:09:16AM +0400, Cyrill Gorcunov wrote:
>> On 05/02/2011 09:51 AM, Cyrill Gorcunov wrote:
>>> Yeah, i'll do so as only bring my laptop to life, I managed to kill
>>> grub and can't restore it back for a while, will ping you back as soon
>>> as I can.
>>>
>>> Sorry for top post.
>>>
>>
>> I've managed to semi-restore it. Gleb, maybe there some additional
>> parameter needed for kvm (except -cpu host,+x2apic) to make it work
>> with cluster mode? I always see physical mode which was not the target
>> of the patch series.
>>
> Hmm, +x2apic is enough to advertise x2apic presents to the OS. What
> logic Linux uses to decide which mode to use?
>
> --
> Gleb.
As far as I know interrupt remapping should be supported by kernel
to switch to logic cluster mode, so I presume kvm doesn't support
it yet and in result only physical mode is used. I think ACPI_SIG_DMAR
is missed in acpi tables (actually I didn't find it in kvm sources).
--
Thanks,
Cyrill
next prev parent reply other threads:[~2011-05-02 7:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-30 17:14 [patch 0/2] x2apic optimization, round 4 Cyrill Gorcunov
2011-04-30 17:15 ` [patch 1/2] x86, x2apic: minimize IPI register writes using cluster groups v4 Cyrill Gorcunov
2011-05-01 17:18 ` Ingo Molnar
2011-04-30 17:15 ` [patch 2/2] x86, x2apic: Move the common bits of physical and cluster modes to x2apic.h v4 Cyrill Gorcunov
2011-04-30 20:14 ` [patch 0/2] x2apic optimization, round 4 Avi Kivity
2011-04-30 20:33 ` Cyrill Gorcunov
2011-05-01 16:46 ` Ingo Molnar
2011-05-01 17:11 ` Cyrill Gorcunov
2011-05-02 5:39 ` Gleb Natapov
2011-05-02 5:51 ` Cyrill Gorcunov
2011-05-02 7:09 ` Cyrill Gorcunov
2011-05-02 7:45 ` Gleb Natapov
2011-05-02 7:52 ` Cyrill Gorcunov [this message]
2011-05-02 8:04 ` Gleb Natapov
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