Colin, thank you for the fix, I will switch to xenial-proposed now. As a followup, upstream merged my PR so 1014-kernel-lookup-bdev.patch may be removed once the next ZFS on Linux release gets synced to us, hopefully in time for zesty.
-- 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/1636517 Title: zfs: importing zpool with vdev on zvol hangs kernel Status in linux package in Ubuntu: Triaged Status in zfs-linux package in Ubuntu: Fix Released Status in linux source package in Xenial: New Status in zfs-linux source package in Xenial: Fix Committed Status in linux source package in Yakkety: New Status in zfs-linux source package in Yakkety: Fix Committed Status in linux source package in Zesty: Triaged Status in zfs-linux source package in Zesty: Fix Released Bug description: [SRU Request][Xenial][Yakkety] if a zvol of an existing, already imported zpool is a vdev of another zpool, a call to "zpool import" will everything zfs related. the stack trace is as follows: [<ffffffffc038d374>] taskq_wait+0x74/0xe0 [spl] [<ffffffffc038d42b>] taskq_destroy+0x4b/0x100 [spl] [<ffffffffc04a4afd>] vdev_open_children+0x12d/0x180 [zfs] [<ffffffffc04ae6cc>] vdev_root_open+0x3c/0xc0 [zfs] [<ffffffffc04a45f5>] vdev_open+0xf5/0x4d0 [zfs] [<ffffffffc048f11e>] spa_load+0x39e/0x1c60 [zfs] [<ffffffffc049170d>] spa_tryimport+0xad/0x450 [zfs] [<ffffffffc04c42d4>] zfs_ioc_pool_tryimport+0x64/0xa0 [zfs] [<ffffffffc04c770b>] zfsdev_ioctl+0x44b/0x4e0 [zfs] [<ffffffff8122124f>] do_vfs_ioctl+0x29f/0x490 [<ffffffff812214b9>] SyS_ioctl+0x79/0x90 [<ffffffff818318b2>] entry_SYSCALL_64_fastpath+0x16/0x71 [<ffffffffffffffff>] 0xffffffffffffffff [Fix] zfsutils-linux: Zesty: https://launchpadlibrarian.net/290907232/zfs- linux_0.6.5.8-0ubuntu4_0.6.5.8-0ubuntu5.diff.gz Yakkety, likewise Xenial, likewise Sync'd fixes into kernel repos, patches in: http://kernel.ubuntu.com/~cking/zfs-lp-1636517 [Regression Potential] Minimal. This just touched one line in the zfs module module/zfs/zvol.cand a shim wrapper in include/linux/blkdev_compat.h Tested and passes with the ubuntu kernel team autotest client zfs regression tests. ================================================================= I traced this back to 193fb6a2c94fab8eb8ce70a5da4d21c7d4023bee (erged in 4.4.0-6.21), which added a second parameter to lookup_bdev without patching the zfs module (which needs to special case the vdev-on-zvol case, and uses this exact method only in this special casing code path). attached you can find the output of "zfs send -R" ing such a zvol ("brokenvol.raw"), running "zfs receive POOL/TARGET < FILE" followed by "zpool import" should reproduce the hang. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-45-generic 4.4.0-45.66 ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21 Uname: Linux 4.4.0-45-generic x86_64 NonfreeKernelModules: zfs zunicode zcommon znvpair zavl AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Oct 25 15:46 seq crw-rw---- 1 root audio 116, 33 Oct 25 15:46 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Tue Oct 25 15:49:51 2016 HibernationDevice: RESUME=/dev/mapper/xenial--vg-swap_1 InstallationDate: Installed on 2016-10-25 (0 days ago) InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) PciMultimedia: ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-45-generic root=/dev/mapper/hostname--vg-root ro RelatedPackageVersions: linux-restricted-modules-4.4.0-45-generic N/A linux-backports-modules-4.4.0-45-generic N/A linux-firmware 1.157.4 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-2.7 dmi.modalias: dmi:bvnSeaBIOS:bvrrel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-2.7:cvnQEMU:ct1:cvrpc-i440fx-2.7: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-2.7 dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1636517/+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
