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migration: failover: emit a warning when the card is not fully unplugged 

When the migration fails or is canceled we wait the end of the unplug
operation to be able to plug it back. But if the unplug operation
is never finished we stop to wait and QEMU emits a warning to inform
the user.

Based-on: 20210629155007.629086-1-lvivier@redhat.com
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20210701131458.112036-1-lvivier@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Laurent Vivier 2021-07-01 15:14:58 +02:00 committed by Dr. David Alan Gilbert
parent 224f364a49
commit a51dcef08b
1 changed files with 4 additions and 0 deletions
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4
migration/migration.c
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@ -3701,6 +3701,10 @@ static void qemu_savevm_wait_unplug(MigrationState *s, int old_state,
while (timeout-- && qemu_savevm_state_guest_unplug_pending()) {
qemu_sem_timedwait(&s->wait_unplug_sem, 250);
}
if (qemu_savevm_state_guest_unplug_pending()) {
warn_report("migration: partially unplugged device on "
"failure");
}
}
migrate_set_state(&s->state, MIGRATION_STATUS_WAIT_UNPLUG, new_state);