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Start up a postcopy/listener thread ready for incoming page data

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The loading of a device state (during postcopy) may access guest
memory that's still on the source machine and thus might need
a page fill; split off a separate thread that handles the incoming
page data so that the original incoming migration code can finish
off the device data.

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>
This commit is contained in:
Dr. David Alan Gilbert 2015-11-05 18:11:18 +00:00 • committed by Juan Quintela
parent c4faeed231
commit c76201ab52
4 changed files with 90 additions and 1 deletions
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6
migration/migration.c
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@ -1441,6 +1441,12 @@ static int postcopy_start(MigrationState *ms, bool *old_vm_running)
goto fail;
}
/*
* Make sure the receiver can get incoming pages before we send the rest
* of the state
*/
qemu_savevm_send_postcopy_listen(fb);
qemu_savevm_state_complete_precopy(fb);
qemu_savevm_send_ping(fb, 3);