linux-kernel - Re: [Xen-devel] [PATCH RFC V3 2/4] kvm hypervisor : Add a hypercall to KVM hypervisor to support pv-ticketlocks

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Message-ID: <4EDF45C2.9060108@redhat.com>
Date:	Wed, 07 Dec 2011 12:53:54 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Konrad Rzeszutek Wilk <konrad@...nok.org>
CC:	Raghavendra K T <raghukt@...ux.vnet.ibm.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>, x86@...nel.org,
	Gleb Natapov <gleb@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Virtualization <virtualization@...ts.linux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Xen <xen-devel@...ts.xensource.com>,
	Dave Jiang <dave.jiang@...el.com>, KVM <kvm@...r.kernel.org>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...hat.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Sasha Levin <levinsasha928@...il.com>,
	Sedat Dilek <sedat.dilek@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Yinghai Lu <yinghai@...nel.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Suzuki Poulose <suzuki@...ux.vnet.ibm.com>
Subject: Re: [Xen-devel] [PATCH RFC V3 2/4] kvm hypervisor : Add a hypercall
 to KVM hypervisor to support pv-ticketlocks

On 12/06/2011 06:49 PM, Konrad Rzeszutek Wilk wrote:
> On Sun, Dec 04, 2011 at 11:36:58PM +0530, Raghavendra K T wrote:
> > On 12/02/2011 01:20 AM, Raghavendra K T wrote:
> > >>Have you tested it on AMD machines? There are some differences in the
> > >>hypercall infrastructure there.
> > >
> > >Yes. 'll test on AMD machine and update on that.
> > >
> > 
> > I tested the code on 64 bit Dual-Core AMD Opteron machine, and it is 
> > working.
>
> I am not that familiar with how KVM does migration, but do you need any
> special flags in QEMU to when migrating a KVM-pv-spinlock enabled guest
> to another machine?

I don't think so.  Sleeping is an ordinary HLT state which we already
migrate.  There are no further states.

-- 
error compiling committee.c: too many arguments to function

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