To verify this is fixed, I have done the following. For good measure, I've also successfully booted the above with additional parameter '-smp cpus=2'. That verifies that there is no obvious regression on SMP system.
$ img_url="http://cloud-images.ubuntu.com/daily/server/xenial/current/xenial-server-cloudimg-amd64-disk1.img"; $ wget "${img_url}" -O disk.img # patch the image to have a root passwd and disable cloud-init for simplicity. $ sudo mount-image-callback disk.img -- chroot _MOUNTPOINT_ sh -exc ' touch /etc/cloud/cloud-init.disabled echo "root:root" | chpasswd' # attached 'get-kernels' enables proposed, installs linux-virtual into disk.img # and copies kernels out to out.d $ ./get-kernels disk.img linux-virtual out.d $ for i in out.d/*info; do echo == $i ==; cat $i; done == out.d/build.info == build_name: server serial: 20170106.1 == out.d/vmlinuz-4.4.0-57-generic.pkg-info == linux-image-4.4.0-57-generic: /boot/vmlinuz-4.4.0-57-generic == out.d/vmlinuz-4.4.0-59-generic.pkg-info == linux-image-4.4.0-59-generic: /boot/vmlinuz-4.4.0-59-generic $ kver=4.4.0-57 ; qemu-system-x86_64 -enable-kvm -m 512 \ -drive file=disk.img,if=none,format=qcow2,id=nvme0 \ -device nvme,drive=nvme0,serial=nvme-0 \ -snapshot -nographic -echr 0x05 \ -kernel out.d/vmlinuz-$kver-generic \ -initrd out.d/initrd.img-$kver-generic \ -append "root=LABEL=cloudimg-rootfs console=ttyS0" # if you set 'ver' to 4.4.0-57 (from released kernel version) # then you see failure to find root device from the initramfs # if you set 'ver' to 4.4.0-59 (from -proposed) then it finds root, # and you can log in as root on console with 'root'. ** Attachment added: "get-kernels: enable proposed, install a kernel, copy kernels out." https://bugs.launchpad.net/maas/+bug/1651602/+attachment/4801992/+files/get-kernels ** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1651602 Title: NVMe driver regression for non-smp/1-cpu systems To manage notifications about this bug go to: https://bugs.launchpad.net/curtin/+bug/1651602/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
