[CentOS-virt] Fedora 12 domU will not boot kernel

[Pasi Kärkkäinen]

On Mon, Feb 01, 2010 at 10:20:26AM +0200, Pasi Kärkkäinen wrote:
> On Sat, Jan 30, 2010 at 10:57:02AM +1100, Norman Gaywood wrote:
> > On Sat, Jan 09, 2010 at 03:45:15PM +0200, Pasi Kärkkäinen wrote:
> > > On Fri, Jan 08, 2010 at 10:08:25AM -0500, Tait Clarridge wrote:
> > > > > > Also please try running "xm console" for the guest and see what it does
> > > > > > and where it crashes..
> > > 
> > > Make sure your domU kernel has these kernel cmdline options:
> > > "console=hvc0 earlyprintk=xen"
> > 
> > Do these options work with the F11 guest kernel (2.6.30) as well?
> > 
> 
> Yes, they'll work for all pv_ops kernels.
> 
> > > Also, what hardware was this? There has been some fixes to the incorrect
> > > cpuid masking causing guest kernel crashes on new cpus, and some of
> > > those are fixed in upcoming EL 5.5 Xen.
> > 
> > Are these going to be in 5.4?
> > 
> 
> Not sure. At least in 5.5.
> 
> > I'm running 2.6.18-164.11.1.el5xen and the fedora kernels for F11 and F12
> > are not very stable for me.  Dom0 is a Centos 5.4 2.6.18-164.9.1.el5xen
> > kernel.
> > 
> > These fedora kernels seem to lockup (processes get stuck in D state)
> > whenever put under any load:
> > 
> > kernel-2.6.30.10-105.fc11.x86_64
> > kernel-2.6.31.6-166.fc12.x86_64
> > kernel-2.6.31.9-174.fc12.x86_64
> > 
> > Yes, I tried a fedora 11 kernel on a fedora 12 system. This is the most
> > stable for me.
> > 
> 
> Do you have some easy-to-reproduce test/script so I could try it on my system?
> 
> > Here are some bugzilla entries (one posted by me) that point to this
> > problem:
> > 
> > kernel 2.6.31 processes lock up in D state
> > https://bugzilla.redhat.com/show_bug.cgi?id=550724
> > 
> > FC12 2.6.31.9-174.fc12.x86_64 hangs under heavy disk I/O
> > https://bugzilla.redhat.com/show_bug.cgi?id=551552
> > 
> 

I haven't seen these D state problems, but I found this CONFIG_HIGHPTE xen_set_pte() bug/race
that causes 32bit PAE guest crashes:

https://bugzilla.redhat.com/show_bug.cgi?id=566932

Were your guests 32bit? 

-- Pasi