[PATCH]: Backport KVM Intel MSR fix

[Chris Lalancette]

All,
     Currently, RHEL-4.7 and RHEL-5.3(preview) KVM guests will crash on bootup
on Intel machines running F-9 kernels.  This is because of a bug in the way that
KVM emulates performance counter MSRs.  This was fixed upstream by this commit:

http://git2.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h...

However, it fell into a strange window and missed both 2.6.25 and 2.6.26, but is
now in 2.6.27 (which means F-10 will be just fine).  In the interest of helping
out the Fedora users (especially for Bugzilla bug 462177 and duplicates), I
backported this very simple patch to the current head of F-9 CVS (2.6.26.5).
The patch is attached.  If there are no objections, can someone please commit this?

Thanks,

[Josh Boyer]

On Wed, Sep 17, 2008 at 04:32:05PM +0200, Chris Lalancette wrote:
> All,
>     Currently, RHEL-4.7 and RHEL-5.3(preview) KVM guests will crash on bootup
> on Intel machines running F-9 kernels.  This is because of a bug in the way that
> KVM emulates performance counter MSRs.  This was fixed upstream by this commit:
>
> http://git2.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h...
>
> However, it fell into a strange window and missed both 2.6.25 and 2.6.26, but is
> now in 2.6.27 (which means F-10 will be just fine).  In the interest of helping
> out the Fedora users (especially for Bugzilla bug 462177 and duplicates), I
> backported this very simple patch to the current head of F-9 CVS (2.6.26.5).
> The patch is attached.  If there are no objections, can someone please commit this?

Attached where?  Has the Zimbra patch goblin eaten it again?

josh

[Chris Lalancette]

Josh Boyer wrote:
> On Wed, Sep 17, 2008 at 04:32:05PM +0200, Chris Lalancette wrote:
> > All,
> >     Currently, RHEL-4.7 and RHEL-5.3(preview) KVM guests will crash on bootup
> > on Intel machines running F-9 kernels.  This is because of a bug in the way that
> > KVM emulates performance counter MSRs.  This was fixed upstream by this commit:
> >
> > http://git2.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h...
> >
> > However, it fell into a strange window and missed both 2.6.25 and 2.6.26, but is
> > now in 2.6.27 (which means F-10 will be just fine).  In the interest of helping
> > out the Fedora users (especially for Bugzilla bug 462177 and duplicates), I
> > backported this very simple patch to the current head of F-9 CVS (2.6.26.5).
> > The patch is attached.  If there are no objections, can someone please commit this?
>
> Attached where?  Has the Zimbra patch goblin eaten it again?

Yes, apparently it has, since my outgoing mail shows it attached.  Hm, let's try
this another way then; patch is available here:

http://people.redhat.com/clalance/linux-2.6.26-intel-msr-backport.patch

Thanks,

[Kyle McMartin]

On Wed, Sep 17, 2008 at 05:21:45PM +0200, Chris Lalancette wrote:
>

Looks fine... Appliedinated.

[Chris Lalancette]

Kyle McMartin wrote:
> On Wed, Sep 17, 2008 at 05:21:45PM +0200, Chris Lalancette wrote:
>
> Looks fine... Appliedinated.

Excellent, thanks!