Zvols get lost upon host startup and VM shut down

Affects linux kernels 5.13+ (21.10 uses 5.13).

See: https://github.com/openzfs/zfs/issues/12712

Patch to backport into linux-modules that should fix issue: https://github.com/openzfs/zfs/pull/12759

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: linux-modules-5.13.0-22-generic 5.13.0-22.22
ProcVersionSignature: Ubuntu 5.13.0-22.22-generic 5.13.19
Uname: Linux 5.13.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ibuclaw 5104 F.... pulseaudio
 /dev/snd/pcmC1D0p: ibuclaw 5104 F...m pulseaudio
 /dev/snd/controlC0: ibuclaw 5104 F.... pulseaudio
CasperMD5CheckResult: pass
Date: Thu Dec 30 10:31:05 2021
InstallationDate: Installed on 2021-12-10 (19 days ago)
InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
MachineType: TUXEDO TUXEDO Pulse 15 Gen1
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_2h043n@/vmlinuz-5.13.0-22-generic root=ZFS=rpool/ROOT/ubuntu_2h043n ro quiet splash vt.handoff=1
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-5.13.0-22-generic N/A
 linux-backports-modules-5.13.0-22-generic N/A
 linux-firmware 1.201.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/11/2021
dmi.bios.release: 5.16
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: N.1.07.A03
dmi.board.asset.tag: Standard
dmi.board.name: PULSE1501
dmi.board.vendor: NB02
dmi.board.version: Standard
dmi.chassis.asset.tag: Standard
dmi.chassis.type: 10
dmi.chassis.vendor: TUXEDO
dmi.chassis.version: Standard
dmi.ec.firmware.release: 1.7
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN.1.07.A03:bd05/11/2021:br5.16:efr1.7:svnTUXEDO:pnTUXEDOPulse15Gen1:pvrStandard:rvnNB02:rnPULSE1501:rvrStandard:cvnTUXEDO:ct10:cvrStandard:skuPULSE1501:
dmi.product.family: TUXEDO Computers
dmi.product.name: TUXEDO Pulse 15 Gen1
dmi.product.sku: PULSE1501
dmi.product.version: Standard
dmi.sys.vendor: TUXEDO