From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: RE: rhel6 guest fail to do save? Date: Thu, 13 Jan 2011 07:36:02 +0000 Message-ID: <1294904162.12280.93.camel@localhost.localdomain> References: <749B9D3DBF0F054390025D9EAFF47F2231AFC4CB@shsmsx501.ccr.corp.intel.com> <20110112073727.GJ2754@reaktio.net> <749B9D3DBF0F054390025D9EAFF47F2231AFC752@shsmsx501.ccr.corp.intel.com> <19757.57820.217472.22989@mariner.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <19757.57820.217472.22989@mariner.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: Ian Jackson Cc: "Zhang, Yang Z" , "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org On Wed, 2011-01-12 at 17:16 +0000, Ian Jackson wrote:=20 > Zhang, Yang Z writes ("RE: [Xen-devel] rhel6 guest fail to do save?"): > > From: Pasi K=E4rkk=E4inen [mailto:pasik@iki.fi] > > > I think people have generally been able to save/restore with rhel6, > > > but there are some issues with live migration between different MHz= CPUs, > > > for example: https://bugzilla.redhat.com/show_bug.cgi?id=3D663755 > ... > > Sorry, I mean the HVM. >=20 > This is known not to work. It fails in my automatic tests. >=20 > The current RHEL6 kernel has enough pv-on-hvm drivers to get the > toolstack to try to negotiate with the guest during save, but not > enough (or not working enough) drivers to actually complete the > negotiation. So the toolstack times out and the migrate/save fails. Does any of the pv-on-hvm functionality work at all in RHEL6? Perhaps setting "platform_pci =3D 0" in the guest configuration would wor= k around this issue? In particular if RHEL6 has no useful pv-on-hvm functionality in the first place then nothing is lost. Ian.