From: Wen Congyang <[email protected]> There are still I/O operations when the vm is stopped. For example, stop the vm, and do block migration. In this case, we don't drain all I/O operation, and may meet the following problem:
qemu-system-x86_64: migration/block.c:731: block_save_complete: Assertion `block_mig_state.submitted == 0' failed. Signed-off-by: Wen Congyang <[email protected]> Message-Id: <[email protected]> Cc: [email protected] Signed-off-by: Paolo Bonzini <[email protected]> --- cpus.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/cpus.c b/cpus.c index 877bd70..43676fa 100644 --- a/cpus.c +++ b/cpus.c @@ -1415,6 +1415,8 @@ int vm_stop_force_state(RunState state) return vm_stop(state); } else { runstate_set(state); + + bdrv_drain_all(); /* Make sure to return an error if the flush in a previous vm_stop() * failed. */ return bdrv_flush_all(); -- 2.5.0
