Sagi, With the given patch, I am no more seeing the freeze_queue_wait hang issue, but I am seeing another hang issue: dmesg: [Jul28 11:01] igb 0000:03:00.0 enp3s0f0: igb: enp3s0f0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX [ +0.000137] IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0f0: link becomes ready [Jul28 11:17] cxgb4 0000:02:00.4 enp2s0f4: passive DA module inserted [ +0.579450] cxgb4 0000:02:00.4 enp2s0f4: link up, 40Gbps, full-duplex, Tx/Rx PAUSE [ +0.000683] IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0f4: link becomes ready [Jul28 11:19] nvme nvme0: Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices. [ +0.000159] nvme nvme0: creating 1 I/O queues. [ +0.000350] nvme nvme0: mapped 1/0/0 default/read/poll queues. [ +0.001316] nvme nvme0: new ctrl: NQN "nvme-ram0", addr 102.1.1.6:4420 [Jul28 11:20] DEBUG: cpu: 3: blk_queue_enter:448 process is "nvme" (pid 4011) q->mq_freeze_depth: 1 (pm || (blk_pm_request_resume(q),!blk_queue_pm_only(q)))): 1 blk_queue_dying(q): 0 [ +21.511514] cxgb4 0000:02:00.4: Port 0 link down, reason: Link Down [ +0.560355] cxgb4 0000:02:00.4 enp2s0f4: link up, 40Gbps, full-duplex, Tx/Rx PAUSE [ +0.000941] IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0f4: link becomes ready [Jul28 11:21] cxgb4 0000:02:00.4: Port 0 link down, reason: Link Down [ +0.552934] cxgb4 0000:02:00.4 enp2s0f4: link up, 40Gbps, full-duplex, Tx/Rx PAUSE [ +0.001076] IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0f4: link becomes ready [Jul28 11:22] cxgb4 0000:02:00.4: Port 0 link down, reason: Link Down [ +0.615365] cxgb4 0000:02:00.4 enp2s0f4: link up, 40Gbps, full-duplex, Tx/Rx PAUSE [ +0.000886] IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0f4: link becomes ready [Jul28 11:23] cxgb4 0000:02:00.4: Port 0 link down, reason: Link Down [ +0.556661] cxgb4 0000:02:00.4 enp2s0f4: link up, 40Gbps, full-duplex, Tx/Rx PAUSE [ +0.000837] IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0f4: link becomes ready [ +3.765550] INFO: task bash:3014 blocked for more than 122 seconds. [ +0.000067] Not tainted 5.8.0-rc7ekr+ #2 [ +0.000057] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ +0.000064] bash D14272 3014 2417 0x00000000 [ +0.000066] Call Trace: [ +0.000064] __schedule+0x32b/0x670 [ +0.000060] schedule+0x45/0xb0 [ +0.000059] schedule_timeout+0x216/0x330 [ +0.000060] ? enqueue_task_fair+0x196/0x7e0 [ +0.000059] wait_for_completion+0x81/0xe0 [ +0.000061] __flush_work+0x114/0x1c0 [ +0.000058] ? flush_workqueue_prep_pwqs+0x130/0x130 [ +0.000066] nvme_reset_ctrl_sync+0x25/0x40 [nvme_core] [ +0.000125] nvme_sysfs_reset+0xd/0x20 [nvme_core] [ +0.000137] kernfs_fop_write+0xbc/0x1a0 [ +0.000114] vfs_write+0xc2/0x1f0 [ +0.000120] ksys_write+0x5a/0xd0 [ +0.000106] do_syscall_64+0x3e/0x70 [ +0.000122] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ +0.000115] RIP: 0033:0x7f8124b93317 [ +0.000110] Code: Bad RIP value. [ +0.000109] RSP: 002b:00007ffdbbbff1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ +0.000182] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f8124b93317 [ +0.000138] RDX: 0000000000000002 RSI: 0000559345c156d0 RDI: 0000000000000001 [ +0.000125] RBP: 0000559345c156d0 R08: 000000000000000a R09: 0000000000000001 [ +0.000117] R10: 00005593453d1471 R11: 0000000000000246 R12: 0000000000000002 [ +0.000116] R13: 00007f8124c6d6a0 R14: 00007f8124c6e4a0 R15: 00007f8124c6d8a0 [ +0.000121] INFO: task nvme:4011 blocked for more than 122 seconds. [ +0.000118] Not tainted 5.8.0-rc7ekr+ #2 [ +0.000114] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ +0.000190] nvme D14392 4011 2326 0x00004000 [ +0.000132] Call Trace: [ +0.000117] __schedule+0x32b/0x670 [ +0.000109] schedule+0x45/0xb0 [ +0.000108] blk_queue_enter+0x1e9/0x250 [ +0.000109] ? wait_woken+0x70/0x70 [ +0.000108] blk_mq_alloc_request+0x53/0xc0 [ +0.000112] nvme_alloc_request+0x61/0x70 [nvme_core] [ +0.000118] nvme_submit_user_cmd+0x50/0x310 [nvme_core] [ +0.000126] nvme_user_cmd+0x12e/0x1c0 [nvme_core] [ +0.000124] ? _copy_to_user+0x22/0x30 [ +0.000108] blkdev_ioctl+0x100/0x250 [ +0.000109] block_ioctl+0x34/0x40 [ +0.000110] ksys_ioctl+0x82/0xc0 [ +0.000106] __x64_sys_ioctl+0x11/0x20 [ +0.000126] do_syscall_64+0x3e/0x70 [ +0.000113] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ +0.000132] RIP: 0033:0x7fed0bd2967b [ +0.000134] Code: Bad RIP value. [ +0.000107] RSP: 002b:00007fff55b568a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ +0.000172] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fed0bd2967b [ +0.000112] RDX: 00007fff55b568b0 RSI: 00000000c0484e43 RDI: 0000000000000003 [ +0.000113] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ +0.000130] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff55b5878a [ +0.000119] R13: 0000000000000006 R14: 00007fff55b56f60 R15: 00005595f54554a0 [ +0.000135] Kernel panic - not syncing: hung_task: blocked tasks [ +0.000141] CPU: 8 PID: 520 Comm: khungtaskd Not tainted 5.8.0-rc7ekr+ #2 Testcase: while [ 1 ]; do nvme write-zeroes /dev/nvme0n1 -s 1 -c 1; done while [ 1 ]; do echo 1 > /sys/block/nvme0n1/device/reset_controller; done while [ 1 ]; do ifconfig enp2s0f4 down; sleep 24; ifconfig enp2s0f4 up; sleep 28; done
