Re: [Xen-devel] Re: [Xen-users] dom0 hangs in xen 4.0.1-rc3-pre

[Andreas Kinzler <ml-xen-devel@xxxxxx>]

On 28.09.2010 18:04, Bruce Edge wrote:
> > > > I am still researching this. For testing I bought a test system with
> > > > Westmere-EP (Xeon E5620) which has ARAT. This system worked stable while
> > > > Intel still lists it as having the C6 errata. This leads me to the
> > > > conclusion that the HPET timer migration code (called HPET broadcast)
> > > > from
> > > > Xen is the root cause. This affects all CPUs that use it - but mainly
> > > > Nehalem because of turbo mode.
> > > Thanks for the info. I'll try disabling turbo mode in the BIOS and see if
> > > that helps.
> > > Let me know if there's anything I can run/do/test/etc.
> > If you want to check the issue I am referring to then you need to apply my
> > patch from:
> > http://lists.xensource.com/archives/html/xen-devel/2010-09/msg00556.html
> Andreas,
> With this patch the dom0 hangs when I start the vm in pv mode. The hvm
> ISO based install was OK, but the pv mode runtime hung the dom0
> shortly after the boot entry was selected from the VM's grub menu.
> There was no output on the VM console.
> The dom0 console is printiing these:
> [38927.441493] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]
> [38992.941432] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]
> [39058.441434] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]
> [39123.931432] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]
Please try this dom0 kernel: 
http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=snapshot;h=e6b9b2cbca5093e8e38d3e314e2f6415ad951c60;sf=tgz
I have also attached the kernel config for it that is working for me.

> And lastly, just for confirmation, this it the patch I applied:
Yes. This is the patch I mean.

The kernel mentioned above and my patch gives me a system that works 
quite well on my machines.
Regards Andreas

Attachment: kconfig-2.6.32.18-pvops0-ak3
Description: Text document

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