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migrate_start_postcopy: Command to trigger transition to postcopy

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Once postcopy is enabled (with migrate_set_capability), the migration
will still start on precopy mode.  To cause a transition into postcopy
the:

  migrate_start_postcopy

command must be issued.  Postcopy will start sometime after this
(when it's next checked in the migration loop).

Issuing the command before migration has started will error,
and issuing after it has finished is ignored.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert
2015-11-05 18:10:56 +00:00
committed by Juan Quintela
parent eb59db53a4
commit 4886a1bcb7
7 changed files with 75 additions and 0 deletions
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15
hmp-commands.hx
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@ -1005,6 +1005,21 @@ STEXI
@item migrate_set_parameter @var{parameter} @var{value}
@findex migrate_set_parameter
Set the parameter @var{parameter} for migration.
ETEXI
{
.name = "migrate_start_postcopy",
.args_type = "",
.params = "",
.help = "Switch migration to postcopy mode",
.mhandler.cmd = hmp_migrate_start_postcopy,
},
STEXI
@item migrate_start_postcopy
@findex migrate_start_postcopy
Switch in-progress migration to postcopy mode. Ignored after the end of
migration (or once already in postcopy).
ETEXI
{