> > I'm not sure what the correct behavior for bio & cacheflush is, if > > any. > > REQ_FLUSH is not supported in the bio path. Ouch, that's correct: @@ -414,7 +529,7 @@ static void virtblk_update_cache_mode(struct virtio_device *vdev) u8 writeback = virtblk_get_cache_mode(vdev); struct virtio_blk *vblk = vdev->priv; - if (writeback) + if (writeback && !use_bio) blk_queue_flush(vblk->disk->queue, REQ_FLUSH); else blk_queue_flush(vblk->disk->queue, 0); then it is not safe against power losses. Paolo -- 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
