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a software raid0 array: $sudo mkfs.xfs -f -K /dev/md127 meta-data=/dev/md127 isize=512 agcount=32, agsize=33550272 blks = sectsz=4096 attr=2, projid32bit=1 = crc=1 finobt=1, sparse=1, rmapbt=0 = reflink=1 bigtime=0 inobtcount=0 data = bsize=4096 blocks=1073608704, imaxpct=5 = sunit=64 swidth=256 blks naming =version 2 bsize=4096 ascii-ci=0, ftype=1 log =internal log bsize=4096 blocks=521728, version=2 = sectsz=4096 sunit=1 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 ^C^C^C^C I'm using mkfs.xfs -K to avoid discard-related lock-up issues which I have seen reported when googling - maybe this is just another similar issue. The kernel lockup callstack is at the bottom. Some array details: $sudo mdadm --detail /dev/md127 /dev/md127: Version : 1.2 Creation Time : Thu Aug 8 13:23:59 2024 Raid Level : raid0 Array Size : 4294438912 (4.00 TiB 4.40 TB) Raid Devices : 4 Total Devices : 4 Persistence : Superblock is persistent Update Time : Thu Aug 8 13:23:59 2024 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Layout : -unknown- Chunk Size : 256K Consistency Policy : none Name : 0 UUID : 3490e53f:36d0131b:7c7eb913:0fd62deb Events : 0 Number Major Minor RaidDevice State 0 8 16 0 active sync /dev/sdb 1 8 64 1 active sync /dev/sde 2 8 48 2 active sync /dev/sdd 3 8 80 3 active sync /dev/sdf $lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 46.6G 0 disk ├─sda1 8:1 0 100M 0 part /boot/efi ├─sda2 8:2 0 1G 0 part /boot └─sda3 8:3 0 45.5G 0 part ├─ocivolume-root 252:0 0 35.5G 0 lvm / └─ocivolume-oled 252:1 0 10G 0 lvm /var/oled sdb 8:16 0 1T 0 disk └─md127 9:127 0 4T 0 raid0 sdc 8:32 0 1T 0 disk sdd 8:48 0 1T 0 disk └─md127 9:127 0 4T 0 raid0 sde 8:64 0 1T 0 disk └─md127 9:127 0 4T 0 raid0 sdf 8:80 0 1T 0 disk └─md127 9:127 0 4T 0 raid0 I'll start to look deeper, but any suggestions on the problem are welcome. Thanks, John ort_iscsi aesni_intel crypto_simd cryptd [ 396.110305] CPU: 0 UID: 0 PID: 321 Comm: kworker/0:1H Not tainted 6.11.0-rc1-g8400291e289e #11 [ 396.111020] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.5.1 06/16/2021 [ 396.111695] Workqueue: kblockd blk_mq_run_work_fn [ 396.112114] RIP: 0010:bio_endio+0xa0/0x1b0 [ 396.112455] Code: 96 9a 02 00 48 8b 43 08 48 85 c0 74 09 0f b7 53 14 f6 c2 80 75 3b 48 8b 43 38 48 3d e0 a3 3c b2 75 44 0f b6 43 19 48 8b 6b 40 <84> c0 74 09 80 7d 19 00 75 03 88 45 19 48 89 df 48 89 eb e8 58 fe [ 396.113962] RSP: 0018:ffffa3fec19fbc38 EFLAGS: 00000246 [ 396.114392] RAX: 0000000000000001 RBX: ffff97a284c3e600 RCX: 00000000002a0001 [ 396.114974] RDX: 0000000000000000 RSI: ffffcfb0f1130f80 RDI: 0000000000020000 [ 396.115546] RBP: ffff97a284c41bc0 R08: ffff97a284c3e3c0 R09: 00000000002a0001 [ 396.116185] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9798216ed000 [ 396.116766] R13: ffff97975bf071c0 R14: ffff979751be4798 R15: 0000000000009000 [ 396.117393] FS: 0000000000000000(0000) GS:ffff97b5ff600000(0000) knlGS:0000000000000000 [ 396.118122] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 396.118709] CR2: 00007f2477a45f68 CR3: 0000000107998005 CR4: 0000000000770ef0 [ 396.119398] PKRU: 55555554 [ 396.119627] Call Trace: [ 396.119905] [ 396.120078] ? watchdog_timer_fn+0x1e2/0x260 [ 396.120457] ? __pfx_watchdog_timer_fn+0x10/0x10 [ 396.120900] ? __hrtimer_run_queues+0x10c/0x270 [ 396.121276] ? hrtimer_interrupt+0x109/0x250 [ 396.121663] ? __sysvec_apic_timer_interrupt+0x55/0x120 [ 396.122197] ? sysvec_apic_timer_interrupt+0x6c/0x90 [ 396.122640] [ 396.122815] [ 396.123009] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 396.123473] ? bio_endio+0xa0/0x1b0 [ 396.123794] ? bio_endio+0xb8/0x1b0 [ 396.124082] md_end_clone_io+0x42/0xa0 [ 396.124406] blk_update_request+0x128/0x490 [ 396.124745] ? srso_alias_return_thunk+0x5/0xfbef5 [ 396.125554] ? scsi_dec_host_busy+0x14/0x90 [ 396.126290] blk_mq_end_request+0x22/0x2e0 [ 396.126965] blk_mq_dispatch_rq_list+0x2b6/0x730 [ 396.127660] ? srso_alias_return_thunk+0x5/0xfbef5 [ 396.128386] __blk_mq_sched_dispatch_requests+0x442/0x640 [ 396.129152] blk_mq_sched_dispatch_requests+0x2a/0x60 [ 396.130005] blk_mq_run_work_fn+0x67/0x80 [ 396.130697] process_scheduled_works+0xa6/0x3e0 [ 396.131413] worker_thread+0x117/0x260 [ 396.132051] ? __pfx_worker_thread+0x10/0x10 [ 396.132697] kthread+0xd2/0x100 [ 396.133288] ? __pfx_kthread+0x10/0x10 [ 396.133977] ret_from_fork+0x34/0x40 [ 396.134613] ? __pfx_kthread+0x10/0x10 [ 396.135207] ret_from_fork_asm+0x1a/0x30 [ 396.135863]