Public bug reported: When running rsync or tree (haven't tried much else) on much of the filesystem it will pretty routinely throw a panic report in syslog/kern.log, and the rsync/tree operation will later hang solidly such that even ^C doesn't break back to the shell, and any further file operations will likely hang and lock up their shells. Often requires power cycle rather than just shutdown -r to reboot.
syslog/kern.log: Feb 2 16:52:43 donny kernel: [ 517.355790] VERIFY3(sa.sa_magic == SA_MAGIC) failed (*value* == 3100762) <- *value* varies e.g. 1612270437, 1612270437, 1612283815 Feb 2 16:52:43 donny kernel: [ 517.362904] PANIC at zfs_vfsops.c:585:zfs_space_delta_cb() Feb 2 16:52:43 donny kernel: [ 517.368512] Showing stack for process *pid* <- *pid* varies Feb 2 16:52:43 donny kernel: [ 517.368522] CPU: 1 PID: *pid* Comm: dp_sync_taskq Tainted: P C OE 5.4.0-1028-raspi #31-Ubuntu <- *pid* as above Feb 2 16:52:43 donny kernel: [ 517.368525] Hardware name: Raspberry Pi 4 Model B Rev 1.4 (DT) Feb 2 16:52:43 donny kernel: [ 517.368527] Call trace: Feb 2 16:52:43 donny kernel: [ 517.368540] dump_backtrace+0x0/0x198 Feb 2 16:52:43 donny kernel: [ 517.368544] show_stack+0x28/0x38 Feb 2 16:52:43 donny kernel: [ 517.368549] dump_stack+0xd8/0x134 Feb 2 16:52:43 donny kernel: [ 517.368583] spl_dumpstack+0x2c/0x34 [spl] Feb 2 16:52:43 donny kernel: [ 517.368606] spl_panic+0xe0/0xf8 [spl] Feb 2 16:52:43 donny kernel: [ 517.368837] zfs_space_delta_cb+0x180/0x278 [zfs] Feb 2 16:52:43 donny kernel: [ 517.368968] dmu_objset_userquota_get_ids+0x15c/0x3b8 [zfs] Feb 2 16:52:43 donny kernel: [ 517.369094] dnode_sync+0x11c/0x568 [zfs] Feb 2 16:52:43 donny kernel: [ 517.369216] dmu_objset_sync_dnodes+0x48/0xf0 [zfs] Feb 2 16:52:43 donny kernel: [ 517.369333] sync_dnodes_task+0x34/0x58 [zfs] Feb 2 16:52:43 donny kernel: [ 517.369353] taskq_thread+0x20c/0x3b0 [spl] Feb 2 16:52:43 donny kernel: [ 517.369363] kthread+0x150/0x170 Feb 2 16:52:43 donny kernel: [ 517.369368] ret_from_fork+0x10/0x18 rsync/tree command carries on running (for a while), then later log file shows: Feb 2 16:56:11 donny kernel: [ 725.993423] INFO: task dp_sync_taskq:*pid* blocked for more than 120 seconds. Feb 2 16:56:11 donny kernel: [ 726.000633] Tainted: P C OE 5.4.0-1028-raspi #31-Ubuntu Feb 2 16:56:11 donny kernel: [ 726.007610] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Feb 2 16:56:11 donny kernel: [ 726.015586] dp_sync_taskq D 0 *pid* 2 0x00000028 Feb 2 16:56:11 donny kernel: [ 726.015595] Call trace: Feb 2 16:56:11 donny kernel: [ 726.015608] __switch_to+0x108/0x1c0 Feb 2 16:56:11 donny kernel: [ 726.015615] __schedule+0x328/0x828 Feb 2 16:56:11 donny kernel: [ 726.015621] schedule+0x4c/0xe8 Feb 2 16:56:11 donny kernel: [ 726.015650] spl_panic+0xf4/0xf8 [spl] Feb 2 16:56:11 donny kernel: [ 726.015829] zfs_space_delta_cb+0x180/0x278 [zfs] Feb 2 16:56:11 donny kernel: [ 726.015939] dmu_objset_userquota_get_ids+0x15c/0x3b8 [zfs] Feb 2 16:56:11 donny kernel: [ 726.016045] dnode_sync+0x11c/0x568 [zfs] Feb 2 16:56:11 donny kernel: [ 726.016151] dmu_objset_sync_dnodes+0x48/0xf0 [zfs] Feb 2 16:56:11 donny kernel: [ 726.016256] sync_dnodes_task+0x34/0x58 [zfs] Feb 2 16:56:11 donny kernel: [ 726.016276] taskq_thread+0x20c/0x3b0 [spl] Feb 2 16:56:11 donny kernel: [ 726.016283] kthread+0x150/0x170 Feb 2 16:56:11 donny kernel: [ 726.016288] ret_from_fork+0x10/0x18 Feb 2 16:56:11 donny kernel: [ 726.016298] INFO: task txg_sync:*num* blocked for more than 120 seconds. <- *num* varies Feb 2 16:56:11 donny kernel: [ 726.023051] Tainted: P C OE 5.4.0-1028-raspi #31-Ubuntu Feb 2 16:56:11 donny kernel: [ 726.029957] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Feb 2 16:56:11 donny kernel: [ 726.037919] txg_sync D 0 *num* 2 0x00000028 Feb 2 16:56:11 donny kernel: [ 726.037929] Call trace: Feb 2 16:56:11 donny kernel: [ 726.037939] __switch_to+0x108/0x1c0 Feb 2 16:56:11 donny kernel: [ 726.037945] __schedule+0x328/0x828 Feb 2 16:56:11 donny kernel: [ 726.037951] schedule+0x4c/0xe8 Feb 2 16:56:11 donny kernel: [ 726.037973] taskq_wait+0x78/0xb0 [spl] Feb 2 16:56:11 donny kernel: [ 726.038142] dmu_objset_sync+0x25c/0x3e0 [zfs] Feb 2 16:56:11 donny kernel: [ 726.038263] dsl_dataset_sync+0x74/0x240 [zfs] Feb 2 16:56:11 donny kernel: [ 726.038391] dsl_pool_sync+0xb0/0x3b8 [zfs] Feb 2 16:56:11 donny kernel: [ 726.038509] spa_sync_iterate_to_convergence+0xf8/0x1f0 [zfs] Feb 2 16:56:11 donny kernel: [ 726.038617] spa_sync+0x2ec/0x520 [zfs] Feb 2 16:56:11 donny kernel: [ 726.038736] txg_sync_thread+0x244/0x2a0 [zfs] Feb 2 16:56:11 donny kernel: [ 726.038756] thread_generic_wrapper+0x78/0xa8 [spl] Feb 2 16:56:11 donny kernel: [ 726.038768] kthread+0x150/0x170 Feb 2 16:56:11 donny kernel: [ 726.038774] ret_from_fork+0x10/0x18 I don't know if this is related to bug #1906476 https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1906476 System Information: ubuntu 20.04.2 (5.4.0-1028-raspi) server on RPi4/8G with 8TB external Seagate formatted zfs # lsb_release -rd Description: Ubuntu 20.04.2 LTS Release: 20.04 # apt-cache policy zfsutils-linux zfsutils-linux: Installed: 0.8.3-1ubuntu12.6 Candidate: 0.8.3-1ubuntu12.6 Version table: *** 0.8.3-1ubuntu12.6 500 500 http://ports.ubuntu.com/ubuntu-ports focal-updates/main arm64 Packages 100 /var/lib/dpkg/status 0.8.3-1ubuntu12 500 500 http://ports.ubuntu.com/ubuntu-ports focal/main arm64 Packages # zpool version zfs-0.8.3-1ubuntu12.6 zfs-kmod-0.8.3-1ubuntu12.5 ** Affects: zfs-linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1914287 Title: PANIC at zfs_vfsops.c:585:zfs_space_delta_cb / VERIFY3(sa.sa_magic == SA_MAGIC) failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1914287/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
