** Also affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-z-systems
Assignee: (unassigned) => bugproxy (bugproxy)
** Tags added: reverse-proxy-bugzilla
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1925211
Title:
Hot-unplug of disks leaves broken block devices around in Hirsute on
s390x
Status in Ubuntu on IBM z Systems:
New
Status in linux package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
New
Status in udev package in Ubuntu:
New
Status in linux source package in Hirsute:
Confirmed
Status in systemd source package in Hirsute:
New
Status in udev source package in Hirsute:
New
Bug description:
Repro:
#1 Get a guest
$ uvt-kvm create --disk 5 --password=ubuntu h release=hirsute arch=s390x
label=daily
$ uvt-kvm wait h release=hirsute arch=s390x label=daily
#2 Attach and Detach disk
$ sudo qemu-img create -f qcow2 /var/lib/libvirt/images/test.qcow2 10M
$ virsh attach-disk h /var/lib/libvirt/images/test.qcow2 vdc
$ virsh detach-disk h vdc
From libvirts POV it is gone at this point
$ virsh domblklist h
Target Source
------------------------------------------------------------------
vda /var/lib/uvtool/libvirt/images/hirsute-2nd-zfs.qcow
vdb /var/lib/uvtool/libvirt/images/hirsute-2nd-zfs-ds.qcow
But the guest thinks still it is present
$ uvt-kvm ssh --insecure hirsute-2nd-zfs lsblk
...
vdc 252:32 0 20M 0 disk
This even remains a while after (not a race).
Any access to it in the guest will hang (as you'd expect of a non-existing
blockdev)
4 0 1758 1739 20 0 12140 4800 - S+ pts/0 0:00 |
\_ sudo mkfs.ext4 /dev/vdc
4 0 1759 1758 20 0 6924 1044 - D+ pts/0 0:00 |
\_ mkfs.ext4 /dev/vdc
The result above was originally found with hirsute-guest@hirsute-host
on s390x
I do NOT see the same with groovy-guest@hirsute-host on s390x
I DO see the same with hirsute-guest@groovy-host on s390x
=> Guest version dependent not Host/Hipervisor dependent
I DO see the same with ZFS disks AND LVM disks being added&removed
=> not type dependent
I do NOT see the same on x86.
=> Arch dependent ??
... the evidence slowly points towards an issue in the guest, damn we are so
close to release - but non-fully detaching disks are critical in my POV :-/
Filing this as-is for awareness, but certainly this will need more debugging.
Unsure where this is going to eventually I'll now file it for
kernel/udev/systemd.
If there are any known issues/components that are related let me know please!
---
ProblemType: Bug
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code
2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.11-0ubuntu65
Architecture: s390x
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
CRDA: N/A
CasperMD5CheckResult: unknown
DistroRelease: Ubuntu 21.04
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lspci:
Lspci-vt: -[0000:00]-
Lsusb: Error: command ['lsusb'] failed with exit code 1:
Lsusb-t: Error: command ['lsusb', '-t'] failed with exit code 1:
/sys/bus/usb/devices: No such file or directory
Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
Package: udev
PackageArchitecture: s390x
PciMultimedia:
ProcFB:
ProcKernelCmdLine: root=LABEL=cloudimg-rootfs
ProcVersionSignature: User Name 5.11.0-14.15-generic 5.11.12
RelatedPackageVersions:
linux-restricted-modules-5.11.0-14-generic N/A
linux-backports-modules-5.11.0-14-generic N/A
linux-firmware N/A
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
Tags: hirsute uec-images
Uname: Linux 5.11.0-14-generic s390x
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio cdrom dialout dip floppy lxd netdev plugdev sudo video
_MarkForUpload: True
acpidump:
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1925211/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
