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Re: [Xen-devel] [PATCH RFC 0/4] Fix issues with zero-length records in migration v2



Hi all,

On 14/03/17 14:21, Wei Liu wrote:
On Tue, Mar 14, 2017 at 01:50:44PM +0000, Andrew Cooper wrote:
On 14/03/17 13:20, Julien Grall wrote:
Hi Andrew,

On 21/07/16 18:17, Andrew Cooper wrote:
This series is RFC because it has only had compile testing thusfar.

On AMD hardware supporting Debug Extentions, migration of a PV guest
which is
not currently using Debug Extentions fails, as the save side writes a
X86_PV_VCPU_MSRS record with 0 content, which the receving side
chokes on.

It was alway the intention that such a record would be omitted, but that
obviously didn't go as intended.

Adjust the docs to clarify that such records should be omitted, but that
receving sides should tolerate their presence.

Last December you requested this series to be a blocker for Xen 4.9
(see [1]). Do you have any update on the status?

As previously identified, my opinion is that the code as presented in v1
is correct, and there have been no reasonable arguments to the contrary.

I can post v1 again, but it won't be altered.


What about the subthread starting from
<22422.18745.380486.234849@xxxxxxxxxxxxxxxxxxxxxxxx> ?

Gentle ping on this subject. Any consensus on the way to fix it?

Cheers,

--
Julien Grall

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