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Re: [Xen-devel] [PATCH v6 0/13] Migration Stream v2

Hi Andrew,

On 07/09/2014 01:35 AM, Andrew Cooper wrote:
On 08/07/14 17:35, Konrad Rzeszutek Wilk wrote:
On Mon, Jul 07, 2014 at 06:37:49PM +0100, Andrew Cooper wrote:

Presented here for review is v6 of the Migration Stream v2 work.

v6 follows the integration of this code into XenServer, and having the full
suite of XenRT tests being run.  Included in these tests are live migrations
from 32bit toolstacks to 64bit toolstacks, using the python conversion script.
Several corruption issues have been located and fixed, as well as many minor

In addition, performance tests have been performed.  After finding an initial
regression, the code uas been tweaked to use writev() in preference to
write() which vastly reduces the number of system calls performed.  The
performance is now better than the legacy code for all sizes of VM.

.. snip..
The code is presented here for comment/query/critism.
My notes say: 'tmem and remus need work'. Is that addressed by this
patchset or would that be further work?

Thank you.

tmem still completely outstanding.

remus is being worked on by Yang (which is fantastic from my point of
view).  I believe this is a PoC apparently working?

Do you mean a PoC of remus support on migration v2? If so, yes, I will
post a RFC patch on this.

BTW, will migration v2 be in Xen 4.5(both libxc and libxl side)?
If it will be in Xen 4.5, will legacy migration be completely removed
from 4.5 or both versions of migration will co-exist for a period?


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