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Re: [Xen-devel] Suspend/Save a machine under HVM (questions for implemen
| To: | James Harper <james.harper@xxxxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Suspend/Save a machine under HVM (questions for implementation in Win GPL PV driveres) |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Tue, 26 Feb 2008 11:54:22 +0000 |
| Delivery-date: | Tue, 26 Feb 2008 03:54:16 -0800 |
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| Thread-topic: | [Xen-devel] Suspend/Save a machine under HVM (questions for implementation in Win GPL PV driveres) |
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On 26/2/08 11:27, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote: > *1 what happens if the outstanding requests were: > A - Read value from sector 42 > B - Write value X to sector 42 > C - Read value from sector 42 > > If all the requests had been completed by the backend but not yet > processed on the frontend, then when the operations are retransmitted, > operation A is going to return the value of X, instead of whatever was > previously in sector 42. Maybe this doesn't matter... This doesn't happen with Linux I'm pretty sure, as accesses to a single block are serialised at a higher level. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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