I found similar looking issue here https://lkml.org/lkml/2016/6/22/102, however, we are not using CFQ, the schedule is set to noop and scsi-mq/blk-mq is not enabled. Jun 28 09:46:41 roc04r-sca090 kernel: [137912.684974] CPU: 30 PID: 10403 Comm: ceph-osd Not tainted 4.4.13-040413-generic #201606072354 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.684991] Hardware name: Supermicro X9DRi-LN4+/X9DR3-LN4+/X9DRi-LN4+/X9DR3-LN4+, BIOS 3.2 03/04/2015 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685009] task: ffff880f79df8000 ti: ffff880f79fb8000 task.ti: ffff880f79fb8000 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685024] RIP: 0010:[<ffffffff810b416e>] [<ffffffff810b416e>] task_numa_find_cpu+0x22e/0x6f0 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685051] RSP: 0018:ffff880f79fbb818 EFLAGS: 00010206 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685063] RAX: 0000000000000000 RBX: ffff880f79fbb8b8 RCX: 0000000000000000 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685076] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8810352d4800 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685107] RBP: ffff880f79fbb880 R08: 00000001020cf87c R09: 0000000000ff00ff Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685150] R10: 0000000000000009 R11: 0000000000000006 R12: ffff8807c3adc4c0 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685194] R13: 0000000000000006 R14: 000000000000033e R15: fffffffffffffec7 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685238] FS: 00007f30e46b8700(0000) GS:ffff88105f580000(0000) knlGS:0000000000000000 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685283] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685310] CR2: 000000001321a000 CR3: 0000000853598000 CR4: 00000000000406e0 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685354] Stack: Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685374] ffffffff813d050f 000000000000000d 0000000000000045 ffff880f79df8000 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685426] 000000000000033f 0000000000000000 0000000000016b00 000000000000033f Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685477] ffff880f79df8000 ffff880f79fbb8b8 00000000000001f4 0000000000000054 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685528] Call Trace: Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685555] [<ffffffff813d050f>] ? cpumask_next_and+0x2f/0x40 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685584] [<ffffffff810b4a6e>] task_numa_migrate+0x43e/0x9b0 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685613] [<ffffffff810b3acc>] ? update_cfs_shares+0xbc/0x100 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685642] [<ffffffff810b5059>] numa_migrate_preferred+0x79/0x80 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685672] [<ffffffff810b9b94>] task_numa_fault+0x7f4/0xd40 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685700] [<ffffffff813d9634>] ? timerqueue_del+0x24/0x70 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685729] [<ffffffff810b9205>] ? should_numa_migrate_memory+0x55/0x130 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685762] [<ffffffff811bd590>] handle_mm_fault+0xbc0/0x1820 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685793] [<ffffffff810edc00>] ? __hrtimer_init+0x90/0x90 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685822] [<ffffffff810c211d>] ? remove_wait_queue+0x4d/0x60 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685853] [<ffffffff8121e20a>] ? poll_freewait+0x4a/0xa0 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685882] [<ffffffff8106a537>] __do_page_fault+0x197/0x400 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685910] [<ffffffff8106a7c2>] do_page_fault+0x22/0x30 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685939] [<ffffffff8180a878>] page_fault+0x28/0x30 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685967] [<ffffffff813e4c5f>] ? copy_page_to_iter_iovec+0x5f/0x300 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685997] [<ffffffff810b2795>] ? select_task_rq_fair+0x625/0x700 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686026] [<ffffffff813e4f16>] copy_page_to_iter+0x16/0xa0 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686056] [<ffffffff816f02ad>] skb_copy_datagram_iter+0x14d/0x280 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686087] [<ffffffff8174a503>] tcp_recvmsg+0x613/0xbe0 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686117] [<ffffffff8177844e>] inet_recvmsg+0x7e/0xb0 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686146] [<ffffffff816e0d3b>] sock_recvmsg+0x3b/0x50 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686173] [<ffffffff816e0f91>] SYSC_recvfrom+0xe1/0x160 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686202] [<ffffffff810f36f5>] ? ktime_get_ts64+0x45/0xf0 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686230] [<ffffffff816e239e>] SyS_recvfrom+0xe/0x10 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686259] [<ffffffff818086f2>] entry_SYSCALL_64_fastpath+0x16/0x71 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686287] Code: 55 b0 4c 89 f7 e8 53 cd ff ff 48 8b 55 b0 49 8b 4e 78 48 8b 82 d8 01 00 00 48 83 c1 01 31 d2 49 0f af 86 b0 00 00 00 4c 8b 73 78 <48> f7 f1 48 8b 4b 20 49 89 c0 48 29 c1 48 8b 45 d0 4c 03 43 48 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686512] RIP [<ffffffff810b416e>] task_numa_find_cpu+0x22e/0x6f0 Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686544] RSP <ffff880f79fbb818> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686896] ---[ end trace 544cb9f68cb55c93 ]--- Jun 28 09:52:15 roc04r-sca090 kernel: [138246.669713] mpt2sas_cm0: log_info(0x30030101): originator(IOP), code(0x03), sub_code(0x0101) Jun 28 09:55:01 roc0