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COLO: quick failover process by kick COLO thread 

COLO thread may sleep at qemu_sem_wait(&s->colo_checkpoint_sem),
while failover works begin, It's better to wakeup it to quick
the process.

Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
zhanghailiang 2018-09-03 12:38:59 +08:00 committed by Jason Wang
parent 7b3435309d
commit 2518aec192
1 changed files with 8 additions and 0 deletions
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8
migration/colo.c
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@ -131,6 +131,11 @@ static void primary_vm_do_failover(void)
migrate_set_state(&s->state, MIGRATION_STATUS_COLO,
MIGRATION_STATUS_COMPLETED);
/*
* kick COLO thread which might wait at
* qemu_sem_wait(&s->colo_checkpoint_sem).
*/
colo_checkpoint_notify(migrate_get_current());
/*
* Wake up COLO thread which may blocked in recv() or send(),
@ -539,6 +544,9 @@ static void colo_process_checkpoint(MigrationState *s)
qemu_sem_wait(&s->colo_checkpoint_sem);
if (s->state != MIGRATION_STATUS_COLO) {
goto out;
}
ret = colo_do_checkpoint_transaction(s, bioc, fb);
if (ret < 0) {
goto out;