My amd64 server crashed while I was running git clone on a repository that adds up to 12 GB unpacked. The crash dump confirms that the assertion is associated with the pool being written. The pool is a mirror on two 2TB HP MM2000JEFRC HPD4 drives on a 1200 MBps SAS bus. The smartpqi driver from FreeBSD 14.0 because it fixes a bug I was hitting. Otherwise, stable/13 with ZFS changes through 282fd2c39ee6 Add vnode_pager_clean_{a,}sync(9) and other changes through 763b10806cd4 LinuxKPI: 802.11: lsta txq locking cleanup #3 0xffffffff80bd26bf in vpanic ( fmt=0xffffffff82cf72a7 "VERIFY3(zio->io_error == ENXIO) failed (%lld == %lld)\n", ap=ap@entry=0xfffffe03a0489db0) at /usr/home/jfc/freebsd/src/sys/kern/kern_shutdown.c:921 buf = "VERIFY3(zio->io_error == ENXIO) failed (0 == 6)\n", '\000' <repeats 207 times> other_cpus = {__bits = {281474974613503, 0, 0, 0}} td = 0xfffff80182b88000 bootopt = <unavailable> newpanic = <optimized out> #4 0xffffffff82a2a2ea in spl_panic (file=<optimized out>, func=<optimized out>, line=<optimized out>, fmt=<unavailable>) at /usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/os/freebsd/spl/spl_misc.c:107 ap = {{gp_offset = 48, fp_offset = 48, overflow_arg_area = 0xfffffe03a0489de0, reg_save_area = 0xfffffe03a0489d80}} #5 0xffffffff82c27e60 in zio_vdev_io_done (zio=0xfffff8184fb87000) at /usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/zfs/zio.c:3929 vd = 0xfffffe03a0a2e000 ops = 0xffffffff82d0e530 <vdev_disk_ops> unexpected_error = <optimized out> #6 0xffffffff82c1ff5b in __zio_execute (zio=0xfffff8184fb87000) at /usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/zfs/zio.c:2219 stage = ZIO_STAGE_VDEV_IO_DONE pipeline = <optimized out> #7 zio_execute (zio=<optimized out>) at /usr/home/jfc/freebsd/src/sys/contrib/openzfs/module/zfs/zio.c:2130 cookie = 0 #8 0xffffffff80c31e1b in taskqueue_run_locked ( queue=queue@entry=0xfffff80182f7e200) at /usr/home/jfc/freebsd/src/sys/kern/subr_taskqueue.c:518 et = {et_link = {tqe_next = 0xfffffe03a0489ec0, tqe_prev = 0xffffffff80bde948 <_sleep+712>}, et_td = 0x0, et_section = {bucket = 0}, et_old_priority = 0 '\000'} tb = {tb_running = 0xfffff8184fb87410, tb_seq = 523385, tb_canceling = false, tb_link = {le_next = 0x0, le_prev = 0xfffff80182f7e210}} task = 0xfffff8184fb87410 in_net_epoch = false pending = 1 #9 0xffffffff80c32eb3 in taskqueue_thread_loop ( arg=arg@entry=0xfffff80178145320) at /usr/home/jfc/freebsd/src/sys/kern/subr_taskqueue.c:830 tq = 0xfffff80182f7e200 tqp = <optimized out> #10 0xffffffff80b8c400 in fork_exit ( callout=0xffffffff80c32de0 <taskqueue_thread_loop>, arg=0xfffff80178145320, frame=0xfffffe03a0489f40) at /usr/home/jfc/freebsd/src/sys/kern/kern_fork.c:1151 td = 0xfffff80182b88000 p = 0xffffffff81e46828 <proc0> dtd = <optimized out> The zio object is stage = 0x200000 *zio = { io_bookmark = {zb_objset = 93, zb_object = 1087285, zb_level = 0, zb_blkid = 0}, io_prop = {zp_checksum = ZIO_CHECKSUM_INHERIT, zp_compress = ZIO_COMPRESS_INHERIT, zp_complevel = 0 '\000', zp_type = DMU_OT_NONE, zp_level = 0 '\000', zp_copies = 0 '\000', zp_dedup = 0, zp_dedup_verify = 0, zp_nopwrite = 0, zp_encrypt = 0, zp_byteorder = 0, zp_salt = "\000\000\000\000\000\000\000", zp_iv = '\000' < repeats 11 times > , zp_mac = '\000' < repeats 15 times >, zp_zpl_smallblk = 0}, io_type = ZIO_TYPE_WRITE, io_child_type = ZIO_CHILD_VDEV, io_trim_flags = 0, io_cmd = 0, io_priority = ZIO_PRIORITY_ASYNC_WRITE, io_reexecute = 0 '\000', io_state = "\001", io_txg = 24604026, io_spa = 0xfffffe03a0755000, io_bp = 0xfffff819959c5578, io_bp_override = 0x0, io_bp_copy = {blk_dva = {{dva_word = {8, 3219260528}}, {dva_word = {0, 0}}, {dva_word = {0, 0}}}, blk_prop = 13840414884522819587, blk_pad = {0, 0}, blk_phys_birth = 0, blk_birth = 24604026, blk_fill = 0, blk_cksum = {zc_word = {3816859218741551286, 1781004871607911648, 15693030277188822173, 4275945154273572093}}}, io_parent_list = {list_size = 48, list_offset = 16, list_head = {list_next = 0xfffff809344e0820, list_prev = 0xfffff809344e0820}}, io_child_list = {list_size = 48, list_offset = 32, list_head = {list_next = 0xfffff8184fb87158, list_prev = 0xfffff8184fb87158}}, io_logical = 0xfffff8250eb404d0, io_transform_stack = 0x0, io_ready = 0x0, io_children_ready = 0x0, io_physdone = 0x0, io_done = 0xffffffff82b6eb00 < vdev_mirror_child_done >, io_private = 0xfffff808d1b901c8, io_prev_space_delta = 0, io_bp_orig = {blk_dva = {{dva_word = {8, 3219260528}}, {dva_word = {0, 0}}, {dva_word = {0, 0}}}, blk_prop = 13840414884522819587, blk_pad = {0, 0}, blk_phys_birth = 0, blk_birth = 24604026, blk_fill = 0, blk_cksum = {zc_word = {3816859218741551286, 1781004871607911648, 15693030277188822173, 4275945154273572093}}}, io_lsize = 4096, io_abd = 0xfffff806be831400, io_orig_abd = 0xfffff806be831400, io_size = 4096, io_orig_size = 4096, io_vd = 0xfffffe03a0a2e000, io_vsd = 0x0, io_vsd_ops = 0x0, io_metaslab_class = 0xfffff801783e9800, io_offset = 1648265584640, io_timestamp = 349058909606831, io_queued_timestamp = 349058909606751, io_target_timestamp = 0, io_delta = 11021342, io_delay = 0, io_queue_node = {avl_child = {0xfffff818775ddc40, 0xfffff81e7bd742a0}, avl_pcb = 18446735417614089285}, io_offset_node = {avl_child = {0xfffff818775ddc58, 0xfffff81e7bd742b8}, avl_pcb = 18446735417614089309}, io_alloc_node = {avl_child = {0x0, 0x0}, avl_pcb = 0}, io_alloc_list = {zal_list = {list_size = 72, list_offset = 0, list_head = {list_next = 0xfffff8184fb872f8, list_prev = 0xfffff8184fb872f8}}, zal_size = 0}, io_flags = 1575040, io_stage = ZIO_STAGE_VDEV_IO_DONE, io_pipeline = (ZIO_STAGE_VDEV_IO_START | ZIO_STAGE_VDEV_IO_DONE | ZIO_STAGE_VDEV_IO_ASSESS | ZIO_STAGE_DONE), io_orig_flags = 1048704, io_orig_stage = ZIO_STAGE_READY, io_orig_pipeline = (ZIO_STAGE_VDEV_IO_START | ZIO_STAGE_VDEV_IO_DONE | ZIO_STAGE_VDEV_IO_ASSESS | ZIO_STAGE_DONE), io_pipeline_trace = (ZIO_STAGE_OPEN | ZIO_STAGE_VDEV_IO_START | ZIO_STAGE_VDEV_IO_DONE), io_error = 0, io_child_error = {0, 0, 0, 0}, io_children = {{0, 0}, {0, 0}, {0, 0}, {0, 0}}, io_child_count = 0, io_phys_children = 0, io_parent_count = 1, io_stall = 0x0, io_gang_leader = 0x0, io_gang_tree = 0x0, io_executor = 0xfffff80182b88000, io_waiter = 0x0, io_bio = 0x0, io_lock = {lock_object = {lo_name = 0xffffffff82ca3c8d <.L.str .112 + 1 > "zio->io_lock", lo_flags = 577830912, lo_data = 0, lo_witness = 0x0}, sx_lock = 1}, io_cv = {cv_description = 0xffffffff82caea62 <.L.str .113 + 1 > "zio->io_cv", cv_waiters = 0}, io_allocator = 0, io_cksum_report = 0x0, io_ena = 0, io_tqent = { tqent_task = {ta_link = {stqe_next = 0x0}, ta_pending = 0, ta_priority = 0 '\000', ta_flags = 0 '\000', ta_func = 0xffffffff82a2bd90 < taskq_run_ent >, ta_context = 0xfffff8184fb87410}, tqent_timeout_task = {q = 0x0, t = {ta_link = {stqe_next = 0x0}, ta_pending = 0, ta_priority = 0 '\000', ta_flags = 0 '\000', ta_func = 0x0, ta_context = 0x0}, c = {c_links = {le = {le_next = 0x0, le_prev = 0x0}, sle = {sle_next = 0x0}, tqe = {tqe_next = 0x0, tqe_prev = 0x0}}, c_time = 0, c_precision = 0, c_arg = 0x0, c_func = 0x0, c_lock = 0x0, c_flags = 0, c_iflags = 0, c_cpu = 0}, f = 0}, tqent_func = 0xffffffff82c1fee0 < zio_execute >, tqent_arg = 0xfffff8184fb87000, tqent_id = 0, tqent_hash = {cle_next = 0x0, cle_prev = 0x0}, tqent_type = 0 '\000', tqent_registered = 0 '\000', tqent_cancelled = 0 '\000', tqent_rc = 0 } } zio->io_vd->vdev_guid = 11713793445848286627 which corresponds to da1 in this pool: pool: data state: ONLINE scan: scrub repaired 0B in 04:45:15 with 0 errors on Sat Oct 7 00:08:52 2023 config: NAME STATE READ WRITE CKSUM data ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 da0 ONLINE 0 0 0 da1 ONLINE 0 0 0 cache nvd0p5 ONLINE 0 0 0
When I ran "git reset --hard" to recover the partially extracted repository I got one of the crashes from bug #276420: panic: VERIFY(zio->io_stall == NULL) failed The underlying problem seems to be that my server with lots of memory and CPU is incapable of writing 10 gigabytes of data to a spinning disk without crashing. The pool configuration is different from 276420, this time being a two way mirror instead of a 5 disk raidz2.