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[Xen-devel] Re: issues with movnti emulation
| To: | Jan Beulich <jbeulich@xxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: issues with movnti emulation |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 21 Nov 2008 11:19:38 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 21 Nov 2008 03:20:04 -0800 |
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| In-reply-to: | <4926A3DB.76E4.0078.0@xxxxxxxxxx> |
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| Thread-index: | AclLywpMSPsQ4re+Ed272AAX8io7RQ== |
| Thread-topic: | issues with movnti emulation |
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On 21/11/08 11:04, "Jan Beulich" <jbeulich@xxxxxxxxxx> 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 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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