From mboxrd@z Thu Jan 1 00:00:00 1970 From: Don Dutile Subject: Re: rhel6 guest fail to do save? Date: Thu, 13 Jan 2011 16:22:36 -0500 Message-ID: <4D2F6D1C.9070905@redhat.com> 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> <1294904162.12280.93.camel@localhost.localdomain> <20110113074726.GM2754@reaktio.net> Reply-To: ddutile@redhat.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20110113074726.GM2754@reaktio.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: =?ISO-8859-1?Q?Pasi_K=E4rkk=E4inen?= Cc: "Zhang, Yang Z" , "xen-devel@lists.xensource.com" , Ian Jackson , Ian Campbell List-Id: xen-devel@lists.xenproject.org Pasi K=E4rkk=E4inen wrote: > On Thu, Jan 13, 2011 at 07:36:02AM +0000, Ian Campbell wrote: >> 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. >>> This is known not to work. It fails in my automatic tests. >>> >>> 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 = work >> around this issue? In particular if RHEL6 has no useful pv-on-hvm >> functionality in the first place then nothing is lost. >> >=20 > RHEL6 is supposed to have working PV-on-HVM drivers, > based on Stefano's patches. >=20 > Redhat has tested them with RHEL5 dom0, afaik. >=20 Correct. xen-emul-unplug doesn't work, though, due to late patch that broke that bit of it. A fair number of upstream patches for pv-hvm & save/restore have been backported to the next rhel6 update, so hoping this state of missing pieces in rhel6 pv-on-hvm will be short-lived. oh, added benefit: the patches should improve rhel6 (pv-on)hvm on non-RHEL5 dom0's as well. > -- Pasi >=20 >=20 > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel