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migration: improve documentation of postcopy-ram

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This capability must have the same value on both source and destination,
otherwise migration fails (commit 875fcd013a "migration: incoming
postcopy advise sanity checks").

Let's write it down in various places where postcopy-ram is documented.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <151801810352.29167.4832480228518630626.stgit@bahia.lan>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Greg Kurz 2018-02-07 16:41:43 +01:00 • committed by Dr. David Alan Gilbert
parent 96994fd1e4
commit c2eb7f213a
3 changed files with 10 additions and 7 deletions
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4
docs/devel/migration.rst
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@ -387,8 +387,8 @@ doesn't finish in a given time the switch is made to postcopy.
Enabling postcopy
-----------------
To enable postcopy, issue this command on the monitor prior to the
start of migration:
To enable postcopy, issue this command on the monitor (both source and
destination) prior to the start of migration:
``migrate_set_capability postcopy-ram on``