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

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)
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:
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-
Description: Text document

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