linux-kernel - Re: [patch 0/2] x2apic optimization, round 4

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Message-ID: <20110502053928.GB18376@redhat.com>
Date:	Mon, 2 May 2011 08:39:28 +0300
From:	Gleb Natapov <gleb@...hat.com>
To:	Cyrill Gorcunov <gorcunov@...nvz.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Avi Kivity <avi@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [patch 0/2] x2apic optimization, round 4

On Sun, May 01, 2011 at 09:11:35PM +0400, Cyrill Gorcunov wrote:
> On Sun, May 1, 2011 at 8:46 PM, Ingo Molnar <mingo@...e.hu> wrote:
> >
> > * Avi Kivity <avi@...hat.com> wrote:
> >
> >> On 04/30/2011 08:14 PM, Cyrill Gorcunov wrote:
> >> >   Hi Ingo, here is an updated series of two patches for
> >> >x2apic cluster mode ipi optimization. Please take a
> >> >look.
> >> >
> >> >   The only concern which was unresolved is a messy bit
> >> >in default_setup_apic_routing(), so we've added a FIXME
> >> >there and clean it up as only time permits. Actually I
> >> >have a plan to merge probe_32/64.c into single file (and
> >> >even started working on this task) but not yes succeed.
> >> >
> >> >   Anyway I think patches should be in a good shape now and
> >> >probably we could merge them to not lose?
> >> >
> >> >   Comments are welcome.
> >>
> >> Very nice!  This will also significantly speed up kvm guests using x2apic.
> >
> > Ok. It would be nice to know on what systems these patches were tested, i.e. i
> > suppose x2apic-enabled ones?
> >
> > Thanks,
> >
> >        Ingo
> >
> 
> Suresh has tested them on Westmere-Ex system, I personally don't have
> such machine.
Can you test in in KVM with x2apic emulation enabled?

--
			Gleb.
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