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Re: [Xen-devel] vMCE vs migration

On Fri, Feb 10, Jan Beulich wrote:

> >>> On 09.02.12 at 19:02, Olaf Hering <olaf@xxxxxxxxx> wrote:
> > On Mon, Jan 30, Jan Beulich wrote:
> > 
> >> Below/attached a draft patch (compile tested only), handling save/
> >> restore of the bank count, but not allowing for a config setting to
> >> specify its initial value (yet).
> > 
> > Does it take more than just applying this patch for src+dst host and
> > migrate a hvm guest? I see no difference, the mce warning is still
> > there.
> No, it shouldn't require anything else. Could you add a printk() each
> to vmce_{save,load}_vcpu_ctxt() printing what gets saved/restored
> (and at once checking that they actually get executed? I was under
> the impression that adding save records for HVM is a simple drop-in
> exercise these days...

These functions are called for dom0, but not for domU. And as a result
arch.nr_vmce_banks remains zero. I assume the guest needs to be
initialized in some way as well, and that does not happen?


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