Hello, RHEL 5.5 has been released, and it contains many Xen related fixes. Here's the most important of the them.. fixing a dom0 caching bug which could cause domU disk corruption when the domU disk was accessed from dom0 after the domU was shutdown. Most people noticed this bug when pygrub used wrong (cached) information. "pygrub uses cached and eventually outdated grub.conf, kernel and initrd": https://bugzilla.redhat.com/show_bug.cgi?id=466681 And some more: "Xen hypervisor doesn't mask xsave feature from the guest; Fedora 11 PV domU kernel crashes": https://bugzilla.redhat.com/show_bug.cgi?id=524719 "[RHEL-5 Xen]: F-11 Xen 64-bit domU cannot be started with > 2047MB of memory": https://bugzilla.redhat.com/show_bug.cgi?id=502826 " Boot hang when installing HVM DomU": https://bugzilla.redhat.com/show_bug.cgi?id=524052 "[RHEL5 Xen]: PV guest crash on poweroff": https://bugzilla.redhat.com/show_bug.cgi?id=540811 "[RHEL5 Xen]: Cpu frequency scaling is broken on Intel": https://bugzilla.redhat.com/show_bug.cgi?id=553324 RHEL 5.5 kernel changelog: http://rhn.redhat.com/errata/RHSA-2010-0178.html Work-in-progress (Not yet in 5.5): "Grub2 guest support for RHEL5 Xen pygrub": https://bugzilla.redhat.com/show_bug.cgi?id=577511 -- Pasi
On Wed, Mar 31, 2010 at 11:38 AM, Pasi K?rkk?inen <pasik at iki.fi> wrote:> Hello, > > RHEL 5.5 has been released, and it contains many Xen related fixes. > > Here's the most important of the them.. fixing a dom0 caching bug which > could cause domU disk corruption when the domU disk was accessed from dom0 > after the domU was shutdown. Most people noticed this bug when pygrub > used wrong (cached) information. > > "pygrub uses cached and eventually outdated grub.conf, kernel and initrd": > https://bugzilla.redhat.com/show_bug.cgi?id=466681 > > > And some more: > > "Xen hypervisor doesn't mask xsave feature from the guest; Fedora 11 PV > domU kernel crashes": > https://bugzilla.redhat.com/show_bug.cgi?id=524719 > > "[RHEL-5 Xen]: F-11 Xen 64-bit domU cannot be started with > 2047MB of > memory": > https://bugzilla.redhat.com/show_bug.cgi?id=502826 > > " Boot hang when installing HVM DomU": > https://bugzilla.redhat.com/show_bug.cgi?id=524052 > > "[RHEL5 Xen]: PV guest crash on poweroff": > https://bugzilla.redhat.com/show_bug.cgi?id=540811 > > "[RHEL5 Xen]: Cpu frequency scaling is broken on Intel": > https://bugzilla.redhat.com/show_bug.cgi?id=553324 > > > > RHEL 5.5 kernel changelog: > http://rhn.redhat.com/errata/RHSA-2010-0178.html > > > Work-in-progress (Not yet in 5.5): > > "Grub2 guest support for RHEL5 Xen pygrub": > https://bugzilla.redhat.com/show_bug.cgi?id=577511 > > > -- Pasi >Are these changes in the kernel or changes to the installed Xen? I'm wondering if this effects anyone using Xen 3.4 or newer. Grant McWilliams Some people, when confronted with a problem, think "I know, I'll use Windows." Now they have two problems. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20100331/819d5e9f/attachment-0006.html>
On Wed, Mar 31, 2010 at 03:43:38PM -0400, Grant McWilliams wrote:> On Wed, Mar 31, 2010 at 11:38 AM, Pasi K??rkk??inen <[1]pasik at iki.fi> > wrote: > > Hello, > > RHEL 5.5 has been released, and it contains many Xen related fixes. > > Here's the most important of the them.. fixing a dom0 caching bug which > could cause domU disk corruption when the domU disk was accessed from > dom0 > after the domU was shutdown. Most people noticed this bug when pygrub > used wrong (cached) information. > > "pygrub uses cached and eventually outdated grub.conf, kernel and > initrd": > [2]https://bugzilla.redhat.com/show_bug.cgi?id=466681 > > And some more: > > "Xen hypervisor doesn't mask xsave feature from the guest; Fedora 11 PV > domU kernel crashes": > [3]https://bugzilla.redhat.com/show_bug.cgi?id=524719 > > "[RHEL-5 Xen]: F-11 Xen 64-bit domU cannot be started with > 2047MB of > memory": > [4]https://bugzilla.redhat.com/show_bug.cgi?id=502826 > > " Boot hang when installing HVM DomU": > [5]https://bugzilla.redhat.com/show_bug.cgi?id=524052 > > "[RHEL5 Xen]: PV guest crash on poweroff": > [6]https://bugzilla.redhat.com/show_bug.cgi?id=540811 > > "[RHEL5 Xen]: Cpu frequency scaling is broken on Intel": > [7]https://bugzilla.redhat.com/show_bug.cgi?id=553324 > > RHEL 5.5 kernel changelog: > [8]http://rhn.redhat.com/errata/RHSA-2010-0178.html > > Work-in-progress (Not yet in 5.5): > > "Grub2 guest support for RHEL5 Xen pygrub": > [9]https://bugzilla.redhat.com/show_bug.cgi?id=577511 > > -- Pasi > > Are these changes in the kernel or changes to the installed Xen? I'm > wondering if this effects anyone using Xen 3.4 or newer. >I think they're mixed.. you need to go through the bugzillas to figure out. (and possibly compare to the kernel changelog above). -- Pasi
On Wed, Mar 31, 2010 at 06:38:27PM +0300, Pasi K?rkk?inen wrote:> Hello, > > RHEL 5.5 has been released, and it contains many Xen related fixes. > > Here's the most important of the them.. fixing a dom0 caching bug which > could cause domU disk corruption when the domU disk was accessed from dom0 > after the domU was shutdown. Most people noticed this bug when pygrub > used wrong (cached) information. > > "pygrub uses cached and eventually outdated grub.conf, kernel and initrd": > https://bugzilla.redhat.com/show_bug.cgi?id=466681 > > > And some more: > > "Xen hypervisor doesn't mask xsave feature from the guest; Fedora 11 PV domU kernel crashes": > https://bugzilla.redhat.com/show_bug.cgi?id=524719 > > "[RHEL-5 Xen]: F-11 Xen 64-bit domU cannot be started with > 2047MB of memory": > https://bugzilla.redhat.com/show_bug.cgi?id=502826 > > " Boot hang when installing HVM DomU": > https://bugzilla.redhat.com/show_bug.cgi?id=524052 > > "[RHEL5 Xen]: PV guest crash on poweroff": > https://bugzilla.redhat.com/show_bug.cgi?id=540811 > > "[RHEL5 Xen]: Cpu frequency scaling is broken on Intel": > https://bugzilla.redhat.com/show_bug.cgi?id=553324 > > > > RHEL 5.5 kernel changelog: > http://rhn.redhat.com/errata/RHSA-2010-0178.html > > > Work-in-progress (Not yet in 5.5): > > "Grub2 guest support for RHEL5 Xen pygrub": > https://bugzilla.redhat.com/show_bug.cgi?id=577511 >The bz above has a patch that provides working pygrub grub2 support for EL 5.5. I tested it with Ubuntu 10.04 Xen PV guest. Oh, and RHEL/CentOS 5.5 has pygrub ext4 support included, so for example Fedora 12 and Fedora 13 guests can have ext4 /boot now. -- Pasi