Re: issues with movnti emulation

[Keir Fraser <keir.fraser@eu.citrix.com>]

On 21/11/08 11:04, "Jan Beulich" <jbeulich@novell.com> wrote:

>> Of course this data corruption ought only to happen in cases where we'd
>> previously have failed an mmio emulation (and hence probably killed the
>> guest kernel?).
> 
> Yes, we previously saw emulation failure messages. The guest wasn't
> killed because of that, however. I have to admit it's been a while since
> I last looked at mmio emulation - is it eagerly trying to emulate successive
> instructions, and return to native execution when emulation failed? If
> not, I could neither explain why only some data got corrupted here, nor
> why the guest didn't get killed.

TimD had the correct explanation -- page-table pages getting recycled via
Windows' page scrubber.

 -- Keir