commit 2ebeaec012b4e5695612774c44f14c61ab46c72c
author Dr. David Alan Gilbert <dgilbert@redhat.com> Wed Aug 24 18:15:46 2016 +0100
committer Juan Quintela <quintela@trasno.org> Thu Oct 13 17:23:53 2016 +0200
tree d7a492d4699a7240ad7ff7c5bd41bc11928a082e
parent 091ecc8b69bd735383e171828d4e8ed5e34c2a3b

Postcopy vs xbzrle: Don't send xbzrle pages once in postcopy [for 2.8]

xbzrle relies on reading pages that have already been sent
to the destination and then applying the modifications; we can't
do that in postcopy because the destination may well have
modified the page already or the page has been discarded.

I already didn't allow reception of xbzrle pages, but I
forgot to add the test to stop them being sent.

Enabling both xbzrle and postcopy can make some sense;
if you think that your migration might finish if you
have xbzrle, then when it doesn't complete you flick
over to postcopy and stop xbzrle'ing.

This corresponds to RH bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1368422

Symptom is:

Unknown combination of migration flags: 0x60 (postcopy mode)
(either 0x60 or 0x40)

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>