From: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> Signed-off-by: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx> --- block.c | 16 +++++++++++++++- 1 files changed, 15 insertions(+), 1 deletions(-) diff --git a/block.c b/block.c index b88ee90..1fbf4dd 100644 --- a/block.c +++ b/block.c @@ -862,8 +862,22 @@ void bdrv_close_all(void) void bdrv_drain_all(void) { BlockDriverState *bs; + bool busy; - qemu_aio_flush(); + do { + busy = false; + qemu_aio_flush(); + + /* FIXME: We do not have timer support here, so this is effectively + * a busy wait. + */ + QTAILQ_FOREACH(bs, &bdrv_states, list) { + if (!qemu_co_queue_empty(&bs->throttled_reqs)) { + qemu_co_queue_restart_all(&bs->throttled_reqs); + busy = true; + } + } + } while (busy); /* If requests are still pending there is a bug somewhere */ QTAILQ_FOREACH(bs, &bdrv_states, list) { -- 1.7.6 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html