From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shriram Rajagopalan Subject: Re: xl save -c issues with Windows 7 Ultimate Date: Tue, 3 May 2011 09:32:34 -0700 Message-ID: References: <1304427718.18845.103.camel@zakaz.uk.xensource.com> <1304433113.18845.122.camel@zakaz.uk.xensource.com> <20110503144239.GA11800@whitby.uk.xensource.com> Reply-To: rshriram@cs.ubc.ca Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1025295910==" Return-path: In-Reply-To: <20110503144239.GA11800@whitby.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Tim Deegan Cc: Ian Campbell , "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org --===============1025295910== Content-Type: multipart/alternative; boundary=0016e6d6452753199604a261b24d --0016e6d6452753199604a261b24d Content-Type: text/plain; charset=ISO-8859-1 On Tue, May 3, 2011 at 7:42 AM, Tim Deegan wrote: > At 15:31 +0100 on 03 May (1304436713), Ian Campbell wrote: > > On Tue, 2011-05-03 at 15:09 +0100, Shriram Rajagopalan wrote: > > > > > Remus works with HVM domains via normal xenstore based suspend/resume. > > > Only PV-HVM support is "disabled" for the moment. > > > > I'm confused ;-) > > > > PV-HVM uses PV suspend, which can be triggered either by xenstore or the > > suspend evtchn, but the choice of which is mostly orthogonal to whether > > or not suspend cancellation is supported. > > > > The alternative to PV suspend is the inject an ACPI S3 (or whatever) > > event option, isn't it? > > The alternative is not to involve the OS at all; just use the normal HVM > save and restore functions. For Remus, where downtime will be low and > storage consistency is handled elsewhere, that's good enough. > > Tim. > > Enabling it is a matter of just removing the check for pvhvm, which I ll remove and send out a patch soon. :-) I was waiting for the last remus patch (remus: fix incorrect error handling for switch_qemu_logdirty...) to get pulled in before sending the patch. shriram > -- > Tim Deegan > Principal Software Engineer, Xen Platform Team > Citrix Systems UK Ltd. (Company #02937203, SL9 0BG) > > --0016e6d6452753199604a261b24d Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
On Tue, May 3, 2011 at 7:42 AM, Tim Deegan <Tim.Deegan@citrix= .com> wrote:
At 15:31 +0100 on 03 May (1304436713), Ia= n Campbell wrote:
> On Tue, 2011-05-03 at 15:09 +0100, Shriram Rajagopalan wrote:
>
> > Remus works with HVM domains via normal xenstore based suspend/re= sume.
> > Only PV-HVM support is "disabled" for the moment.
>
> I'm confused ;-)
>
> PV-HVM uses PV suspend, which can be triggered either by xenstore or t= he
> suspend evtchn, but the choice of which is mostly orthogonal to whethe= r
> or not suspend cancellation is supported.
>
> The alternative to PV suspend is the inject an ACPI S3 (or whatever) > event option, isn't it?

The alternative is not to involve the OS at all; just use the n= ormal HVM
save and restore functions. =A0For Remus, where downtime will be low and storage consistency is handled elsewhere, that's good enough.

Tim.


Enabling it is a m= atter of just removing the check for pvhvm, which I ll remove
and send o= ut a patch soon. :-)
=A0I was waiting for the last remus patch (remus: f= ix incorrect error handling for
switch_qemu_logdirty...) to get pulled in before sending the patch.

= shriram
--
Tim Deegan <Tim.Deegan@citrix.c= om>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd. =A0(Company #02937203, SL9 0BG)


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