Hi, Sorry for the long delay. It prints exactly the same: [ 3.792033] virtqueue elements = 128, max_segments = 126 (1 queues) [ 3.802191] vda: vda1 vda2 < vda5 > A little bit more about my setup (if it helps): It's a qemu-system-x86_64 kvm instance with 16 cores and 10G of RAM. I can reproduce the bug every time with mkfs.btrfs on a 10GB LVM volume (right after the reboot). I have almost no knowledge of vring / virtio. Is it correct that we need just one sg_elem entry in the vq->vring if vq->indirect flag is set? That's what I thought when applying the "BUG_ON(total_sg > vq->vring.num && !vq->indirect)" patch. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
