From mboxrd@z Thu Jan 1 00:00:00 1970 From: Charlie Smurthwaite Subject: Re: Dom0 restartability Date: Fri, 30 Apr 2010 17:54:37 +0100 Message-ID: References: <7C2EC2BAE9C867409CFF34390FB83E7309F68DE1@xmb-sjc-225.amer.cisco.com> <20100430003427.GW17817@reaktio.net> <7C2EC2BAE9C867409CFF34390FB83E7309F68F5F@xmb-sjc-225.amer.cisco.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1683375338==" Return-path: In-Reply-To: <7C2EC2BAE9C867409CFF34390FB83E7309F68F5F@xmb-sjc-225.amer.cisco.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: "Subbiah Kandasamy (skandasa)" Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org --===============1683375338== Content-Type: multipart/alternative; boundary=0015175d04143dd3d404857719a9 --0015175d04143dd3d404857719a9 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Am I correct in believing that the majority of IO for all domains passes through the DOM-0 kernel? I would think that a huge number of IO drivers would need to move into Xen in order to allow this without severe IO disruption. Are there methods of disk / network IO that do not rely on DOM-0? Charlie On 30 April 2010 17:19, Subbiah Kandasamy (skandasa) wr= ote: > Thanks Pasi, I am sure there are other things as well. I am looking for a= ny > pointers listing the work done in that area. > > Thanks, > -SK. > > -----Original Message----- > From: Pasi K=E4rkk=E4inen [mailto:pasik@iki.fi] > Sent: Thursday, April 29, 2010 5:34 PM > To: Subbiah Kandasamy (skandasa) > Cc: xen-devel@lists.xensource.com > Subject: Re: [Xen-devel] Dom0 restartability > > On Thu, Apr 29, 2010 at 04:05:13PM -0700, Subbiah Kandasamy (skandasa) > wrote: > > In today's Xen summit I heard there is some work done on the > > restartability of dom0. Any pointers to what has been done and what = is > > pending and the patches ?. > > > > Restarting dom0 requires for example moving xenstored out of dom0.. > so you don't lose the database when you restart dom0. > > -- Pasi > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel > --0015175d04143dd3d404857719a9 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Am I correct in believing that the majority of IO for all domains passes th= rough the DOM-0 kernel? I would think that a huge number of IO drivers woul= d need to move into Xen in order to allow this without severe IO disruption= . Are there methods of disk / network IO that do not rely on DOM-0?

Charlie


On 30 April 2010 17:19, S= ubbiah Kandasamy (skandasa) <skandasa@cisco.com> wrote:
Thanks Pasi, I am sure there are other things as well. I am looking for any= pointers listing the work done in that area.

Thanks,
-SK.

-----Original Message-----
From: Pasi K=E4rkk=E4inen [mailto:pasik@iki= .fi]
Sent: Thursday, April 29, 2010 5:34 PM
To: Subbiah Kandasamy (skandasa)
Cc: xen-devel@lists.xensou= rce.com
Subject: Re: [Xen-devel] Dom0 restartability

On Thu, Apr 29, 2010 at 04:05:13PM -0700, Subbiah Kandasamy (skandasa) wrot= e:
> =A0 =A0In today's Xen summit I heard there is some work done on th= e
> =A0 =A0restartability of dom0. Any pointers to what has been done and = what is
> =A0 =A0pending and the patches ?.
>

Restarting dom0 requires for example moving xenstored out of dom0..
so you don't lose the database when you restart dom0.

-- Pasi


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.= com
http://l= ists.xensource.com/xen-devel

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