Hi Yanjun Pls check the full log below: [ 154.195111] run blktests srp/001 at 2022-04-09 01:24:07 [ 154.884071] null_blk: module loaded [ 155.147385] device-mapper: multipath service-time: version 0.3.0 loaded [ 155.150041] device-mapper: table: 253:3: multipath: error getting device (-EBUSY) [ 155.157596] device-mapper: ioctl: error adding target to table [ 155.249783] rdma_rxe: loaded [ 155.317915] infiniband eno1_rxe: set active [ 155.317934] infiniband eno1_rxe: added eno1 [ 155.359282] eno2 speed is unknown, defaulting to 1000 [ 155.364471] eno2 speed is unknown, defaulting to 1000 [ 155.369831] eno2 speed is unknown, defaulting to 1000 [ 155.408213] infiniband eno2_rxe: set down [ 155.408220] infiniband eno2_rxe: added eno2 [ 155.408707] eno2 speed is unknown, defaulting to 1000 [ 155.434214] eno2 speed is unknown, defaulting to 1000 [ 155.450731] eno3 speed is unknown, defaulting to 1000 [ 155.455862] eno3 speed is unknown, defaulting to 1000 [ 155.461208] eno3 speed is unknown, defaulting to 1000 [ 155.499441] infiniband eno3_rxe: set down [ 155.499448] infiniband eno3_rxe: added eno3 [ 155.499689] eno3 speed is unknown, defaulting to 1000 [ 155.525458] eno2 speed is unknown, defaulting to 1000 [ 155.530772] eno3 speed is unknown, defaulting to 1000 [ 155.547309] eno4 speed is unknown, defaulting to 1000 [ 155.552440] eno4 speed is unknown, defaulting to 1000 [ 155.557788] eno4 speed is unknown, defaulting to 1000 [ 155.596054] infiniband eno4_rxe: set down [ 155.596061] infiniband eno4_rxe: added eno4 [ 155.596613] eno4 speed is unknown, defaulting to 1000 [ 155.712777] scsi_debug:sdebug_add_store: dif_storep 524288 bytes @ ffffc9000112c000 [ 155.715031] scsi_debug:sdebug_driver_probe: scsi_debug: trim poll_queues to 0. poll_q/nr_hw = (0/1) [ 155.724090] scsi_debug:sdebug_driver_probe: host protection DIF3 DIX3 [ 155.724098] scsi host15: scsi_debug: version 0191 [20210520] dev_size_mb=32, opts=0x0, submit_queues=1, statistics=0 [ 155.727128] scsi 15:0:0:0: Direct-Access Linux scsi_debug 0191 PQ: 0 ANSI: 7 [ 155.729894] sd 15:0:0:0: Attached scsi generic sg1 type 0 [ 155.730139] sd 15:0:0:0: Power-on or device reset occurred [ 155.735821] sd 15:0:0:0: [sdb] Enabling DIF Type 3 protection [ 155.736235] sd 15:0:0:0: [sdb] 65536 512-byte logical blocks: (33.6 MB/32.0 MiB) [ 155.736294] sd 15:0:0:0: [sdb] Write Protect is off [ 155.736310] sd 15:0:0:0: [sdb] Mode Sense: 73 00 10 08 [ 155.736405] sd 15:0:0:0: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FUA [ 155.736610] sd 15:0:0:0: [sdb] Optimal transfer size 524288 bytes [ 155.749700] sd 15:0:0:0: [sdb] Enabling DIX T10-DIF-TYPE3-CRC protection [ 155.749715] sd 15:0:0:0: [sdb] DIF application tag size 6 [ 155.750455] sd 15:0:0:0: [sdb] Attached SCSI disk [ 156.559521] eno2 speed is unknown, defaulting to 1000 [ 156.664761] eno3 speed is unknown, defaulting to 1000 [ 156.770702] eno4 speed is unknown, defaulting to 1000 [ 156.927509] Rounding down aligned max_sectors from 4294967295 to 4294967288 [ 156.996061] ib_srpt:srpt_add_one: ib_srpt device = 00000000b38bff2d [ 156.996162] ib_srpt:srpt_use_srq: ib_srpt srpt_use_srq(eno1_rxe): use_srq = 0; ret = 0 [ 156.996168] ib_srpt:srpt_add_one: ib_srpt Target login info: id_ext=f2d4e2fffee6e1e0,ioc_guid=f2d4e2fffee6e1e0,pkey=ffff,service_id=f2d4e2fffee6e1e0 [ 156.996450] ib_srpt:srpt_add_one: ib_srpt added eno1_rxe. [ 156.996460] ib_srpt:srpt_add_one: ib_srpt device = 000000000c435da2 [ 156.996492] ib_srpt:srpt_use_srq: ib_srpt srpt_use_srq(eno2_rxe): use_srq = 0; ret = 0 [ 156.996497] ib_srpt:srpt_add_one: ib_srpt Target login info: id_ext=f2d4e2fffee6e1e0,ioc_guid=f2d4e2fffee6e1e0,pkey=ffff,service_id=f2d4e2fffee6e1e0 [ 156.996508] eno2 speed is unknown, defaulting to 1000 [ 157.001651] ib_srpt:srpt_add_one: ib_srpt added eno2_rxe. [ 157.001659] ib_srpt:srpt_add_one: ib_srpt device = 00000000a61769b4 [ 157.001699] ib_srpt:srpt_use_srq: ib_srpt srpt_use_srq(eno3_rxe): use_srq = 0; ret = 0 [ 157.001703] ib_srpt:srpt_add_one: ib_srpt Target login info: id_ext=f2d4e2fffee6e1e0,ioc_guid=f2d4e2fffee6e1e0,pkey=ffff,service_id=f2d4e2fffee6e1e0 [ 157.001714] eno3 speed is unknown, defaulting to 1000 [ 157.006815] ib_srpt:srpt_add_one: ib_srpt added eno3_rxe. [ 157.006823] ib_srpt:srpt_add_one: ib_srpt device = 000000008f72349b [ 157.006856] ib_srpt:srpt_use_srq: ib_srpt srpt_use_srq(eno4_rxe): use_srq = 0; ret = 0 [ 157.006860] ib_srpt:srpt_add_one: ib_srpt Target login info: id_ext=f2d4e2fffee6e1e0,ioc_guid=f2d4e2fffee6e1e0,pkey=ffff,service_id=f2d4e2fffee6e1e0 [ 157.006871] eno4 speed is unknown, defaulting to 1000 [ 157.011971] ib_srpt:srpt_add_one: ib_srpt added eno4_rxe. [ 157.476167] Rounding down aligned max_sectors from 255 to 248 [ 157.546137] Rounding down aligned max_sectors from 255 to 248 [ 157.616022] Rounding down aligned max_sectors from 4294967295 to 4294967288 [ 160.335819] ib_srp:srp_add_one: ib_srp: srp_add_one: 18446744073709551615 / 4096 = 4503599627370495 <> 512 [ 160.335830] ib_srp:srp_add_one: ib_srp: eno1_rxe: mr_page_shift = 12, device->max_mr_size = 0xffffffffffffffff, device->max_fast_reg_page_list_len = 512, max_pages_per_mr = 512, mr_max_size = 0x200000 [ 160.336229] ib_srp:srp_add_one: ib_srp: srp_add_one: 18446744073709551615 / 4096 = 4503599627370495 <> 512 [ 160.336235] ib_srp:srp_add_one: ib_srp: eno2_rxe: mr_page_shift = 12, device->max_mr_size = 0xffffffffffffffff, device->max_fast_reg_page_list_len = 512, max_pages_per_mr = 512, mr_max_size = 0x200000 [ 160.336757] ib_srp:srp_add_one: ib_srp: srp_add_one: 18446744073709551615 / 4096 = 4503599627370495 <> 512 [ 160.336763] ib_srp:srp_add_one: ib_srp: eno3_rxe: mr_page_shift = 12, device->max_mr_size = 0xffffffffffffffff, device->max_fast_reg_page_list_len = 512, max_pages_per_mr = 512, mr_max_size = 0x200000 [ 160.337006] ib_srp:srp_add_one: ib_srp: srp_add_one: 18446744073709551615 / 4096 = 4503599627370495 <> 512 [ 160.337011] ib_srp:srp_add_one: ib_srp: eno4_rxe: mr_page_shift = 12, device->max_mr_size = 0xffffffffffffffff, device->max_fast_reg_page_list_len = 512, max_pages_per_mr = 512, mr_max_size = 0x200000 [ 160.489879] ib_srp:srp_parse_in: ib_srp: 10.16.221.116 -> 10.16.221.116:0 [ 160.489910] ib_srp:srp_parse_in: ib_srp: 10.16.221.116:5555 -> 10.16.221.116:5555 [ 160.489971] ib_srp:add_target_store: ib_srp: max_sectors = 1024; max_pages_per_mr = 512; mr_page_size = 4096; max_sectors_per_mr = 4096; mr_per_cmd = 2 [ 160.489978] ib_srp:srp_max_it_iu_len: ib_srp: max_iu_len = 8260 [ 160.499158] ------------[ cut here ]------------ [ 160.503831] WARNING: CPU: 25 PID: 1907 at kernel/softirq.c:363 __local_bh_enable_ip+0xc7/0x110 [ 160.512450] Modules linked in: ib_srp scsi_transport_srp target_core_user uio target_core_pscsi target_core_file ib_srpt target_core_iblock target_core_mod rdma_cm iw_cm ib_cm ib_umad scsi_debug rdma_rxe ib_uverbs dm_service_time ip6_udp_tunnel udp_tunnel null_blk dm_multipath ib_core rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs rfkill sunrpc vfat fat kmem intel_rapl_msr intel_rapl_common isst_if_common iTCO_wdt iTCO_vendor_support mgag200 skx_edac i2c_algo_bit x86_pkg_temp_thermal drm_shmem_helper intel_powerclamp drm_kms_helper coretemp syscopyarea sysfillrect sysimgblt fb_sys_fops kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel rapl intel_cstate drm device_dax intel_uncore mei_me wmi_bmof pcspkr i2c_i801 mei lpc_ich i2c_smbus intel_pch_thermal nd_pmem ipmi_ssif nd_btt dax_pmem acpi_power_meter xfs libcrc32c sd_mod t10_pi crc64_rocksoft crc64 sg ahci libahci nfit crc32c_intel libata megaraid_sas tg3 wmi libnvdimm dm_mirror [ 160.512669] dm_region_hash dm_log dm_mod ipmi_si ipmi_devintf ipmi_msghandler [ 160.606678] CPU: 25 PID: 1907 Comm: check Tainted: G S I 5.18.0-rc1.yanjun.v1+ #2 [ 160.615293] Hardware name: Dell Inc. PowerEdge R640/06NR82, BIOS 2.11.2 004/21/2021 [ 160.622944] RIP: 0010:__local_bh_enable_ip+0xc7/0x110 [ 160.627996] Code: 00 e8 5d 83 08 00 e8 78 7a 3b 00 fb 65 8b 05 d0 93 e1 61 85 c0 75 05 0f 1f 44 00 00 5b 5d c3 65 8b 05 29 a0 e1 61 85 c0 75 9d <0f> 0b eb 99 e8 00 79 3b 00 eb 9a 48 89 ef e8 86 0a 16 00 eb a3 48 [ 160.646744] RSP: 0018:ffff88810a9ef3f0 EFLAGS: 00010046 [ 160.651978] RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 [ 160.659110] RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffffa228d58c [ 160.666243] RBP: ffffffffc241cd72 R08: ffffed103a3de28b R09: ffffed103a3de28b [ 160.673375] R10: ffff8881d1ef1453 R11: ffffed103a3de28a R12: ffff8881d1ef1450 [ 160.680508] R13: ffff8881d1ef143c R14: ffff8882a4823850 R15: ffff8881d1ef14b0 [ 160.687638] FS: 00007fbae6b89740(0000) GS:ffff888e2fc00000(0000) knlGS:0000000000000000 [ 160.695725] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 160.701470] CR2: 00005558050bac08 CR3: 00000001e1a5a002 CR4: 00000000007706e0 [ 160.708602] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 160.715734] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 160.722867] PKRU: 55555554 [ 160.725581] Call Trace: [ 160.728033] <TASK> [ 160.730141] __rxe_add_to_pool+0x1ce/0x260 [rdma_rxe] [ 160.735209] rxe_create_ah+0xe2/0x330 [rdma_rxe] [ 160.739849] _rdma_create_ah+0x391/0x490 [ib_core] [ 160.744678] ? __ib_create_cq+0x260/0x260 [ib_core] [ 160.749577] ? rcu_read_lock_bh_held+0xc0/0xc0 [ 160.754040] rdma_create_ah+0x185/0x250 [ib_core] [ 160.758769] ? _rdma_create_ah+0x490/0x490 [ib_core] [ 160.763772] cm_alloc_msg+0x15f/0x510 [ib_cm] [ 160.768147] cm_alloc_priv_msg+0x4c/0xb0 [ib_cm] [ 160.772781] ib_send_cm_req+0x816/0x1000 [ib_cm] [ 160.777413] ? ib_send_cm_rej+0x80/0x80 [ib_cm] [ 160.781974] ? lock_is_held_type+0xd9/0x130 [ 160.786179] ? rcu_read_lock_bh_held+0xc0/0xc0 [ 160.790633] ? _raw_spin_unlock+0x29/0x40 [ 160.794661] rdma_connect_locked+0x795/0x1940 [rdma_cm] [ 160.799899] ? rdma_create_qp+0x6d0/0x6d0 [rdma_cm] [ 160.804795] ? lock_release+0x42f/0xc90 [ 160.808637] ? rdma_connect+0x20/0x40 [rdma_cm] [ 160.813188] ? mutex_lock_io_nested+0x1460/0x1460 [ 160.817898] ? rcu_read_lock_sched_held+0xaf/0xe0 [ 160.822610] ? __kasan_slab_alloc+0x2f/0x90 [ 160.826830] rdma_connect+0x2b/0x40 [rdma_cm] [ 160.831201] srp_send_req+0x9ed/0x1660 [ib_srp] [ 160.835746] ? module_assert_mutex_or_preempt+0x41/0x70 [ 160.840974] ? __module_address.part.54+0x25/0x380 [ 160.845769] ? srp_qp_event+0x60/0x60 [ib_srp] [ 160.850225] ? is_module_address+0x41/0x60 [ 160.854331] ? static_obj+0x97/0xc0 [ 160.857832] ? lockdep_init_map_type+0x2f8/0x7f0 [ 160.862471] srp_connect_ch+0xe3/0x1f0 [ib_srp] [ 160.867018] add_target_store+0x1196/0x28e0 [ib_srp] [ 160.871993] ? __lock_acquire+0xc24/0x34a0 [ 160.876124] ? srp_create_ch_ib+0x13e0/0x13e0 [ib_srp] [ 160.881267] ? lock_acquire+0x1e2/0x5a0 [ 160.885116] ? rcu_read_unlock+0x50/0x50 [ 160.889052] ? lock_is_held_type+0xd9/0x130 [ 160.893258] ? kernfs_fop_write_iter+0x2d0/0x490 [ 160.897885] kernfs_fop_write_iter+0x2d0/0x490 [ 160.902340] new_sync_write+0x33a/0x550 [ 160.906192] ? new_sync_read+0x540/0x540 [ 160.910140] ? lock_is_held_type+0xd9/0x130 [ 160.914338] ? rcu_read_lock_held+0xc0/0xc0 [ 160.918541] vfs_write+0x617/0x910 [ 160.921960] ksys_write+0xf1/0x1c0 [ 160.925369] ? __ia32_sys_read+0xb0/0xb0 [ 160.929299] ? syscall_trace_enter.isra.15+0x175/0x250 [ 160.934455] do_syscall_64+0x37/0x80 [ 160.938040] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 160.943099] RIP: 0033:0x7fbae5d205c8 [ 160.946685] Code: 89 02 48 c7 c0 ff ff ff ff eb b3 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 8d 05 d5 3f 2a 00 8b 00 85 c0 75 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 41 54 49 89 d4 55 [ 160.965430] RSP: 002b:00007ffd98335b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 160.972996] RAX: ffffffffffffffda RBX: 0000000000000081 RCX: 00007fbae5d205c8 [ 160.980130] RDX: 0000000000000081 RSI: 000055580502ca20 RDI: 0000000000000001 [ 160.987262] RBP: 000055580502ca20 R08: 000000000000000a R09: 00007fbae5d80820 [ 160.994395] R10: 000000000000000a R11: 0000000000000246 R12: 00007fbae5fc06e0 [ 161.001525] R13: 0000000000000081 R14: 00007fbae5fbb880 R15: 0000000000000081 [ 161.008685] </TASK> [ 161.010876] irq event stamp: 298919 [ 161.014368] hardirqs last enabled at (298917): [<ffffffffa0370be0>] _raw_read_unlock_irqrestore+0x30/0x50 [ 161.024014] hardirqs last disabled at (298918): [<ffffffffa0370219>] _raw_spin_lock_irqsave+0x69/0x90 [ 161.033228] softirqs last enabled at (297844): [<ffffffffa060064a>] __do_softirq+0x64a/0xa4c [ 161.041748] softirqs last disabled at (298919): [<ffffffffc241cce8>] __rxe_add_to_pool+0x138/0x260 [rdma_rxe] [ 161.051660] ---[ end trace 0000000000000000 ]--- [ 161.058297] ================================ [ 161.062572] WARNING: inconsistent lock state [ 161.066844] 5.18.0-rc1.yanjun.v1+ #2 Tainted: G S W I [ 161.072850] -------------------------------- [ 161.077122] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 161.083129] ksoftirqd/25/163 [HC0[0]:SC1[1]:HE0:SE0] takes: [ 161.088699] ffff8881d1ef1468 (&xa->xa_lock#15){+.?.}-{2:2}, at: rxe_pool_get_index+0x72/0x1d0 [rdma_rxe] [ 161.098182] {SOFTIRQ-ON-W} state was registered at: [ 161.103061] lock_acquire+0x1d2/0x5a0 [ 161.106811] _raw_spin_lock+0x33/0x80 [ 161.110565] rxe_alloc+0x1be/0x290 [rdma_rxe] [ 161.115011] rxe_get_dma_mr+0x3a/0x80 [rdma_rxe] [ 161.119716] __ib_alloc_pd+0x1a0/0x550 [ib_core] [ 161.124448] ib_mad_init_device+0x2d9/0xd20 [ib_core] [ 161.129613] add_client_context+0x2fa/0x450 [ib_core] [ 161.134769] enable_device_and_get+0x1b7/0x350 [ib_core] [ 161.140186] ib_register_device+0x757/0xaf0 [ib_core] [ 161.145343] rxe_register_device+0x2eb/0x390 [rdma_rxe] [ 161.150656] rxe_net_add+0x83/0xc0 [rdma_rxe] [ 161.155102] rxe_newlink+0x76/0x90 [rdma_rxe] [ 161.159547] nldev_newlink+0x245/0x3e0 [ib_core] [ 161.164279] rdma_nl_rcv_msg+0x2d4/0x790 [ib_core] [ 161.169176] rdma_nl_rcv+0x1ca/0x3f0 [ib_core] [ 161.173726] netlink_unicast+0x43b/0x640 [ 161.177737] netlink_sendmsg+0x7eb/0xc40 [ 161.181749] sock_sendmsg+0xe0/0x110 [ 161.185416] __sys_sendto+0x1d7/0x2b0 [ 161.189170] __x64_sys_sendto+0xdd/0x1b0 [ 161.193182] do_syscall_64+0x37/0x80 [ 161.196846] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 161.201986] irq event stamp: 21493 [ 161.205391] hardirqs last enabled at (21492): [<ffffffff9e215de8>] __local_bh_enable_ip+0xa8/0x110 [ 161.214431] hardirqs last disabled at (21493): [<ffffffffa0370219>] _raw_spin_lock_irqsave+0x69/0x90 [ 161.223558] softirqs last enabled at (21482): [<ffffffffa060064a>] __do_softirq+0x64a/0xa4c [ 161.231991] softirqs last disabled at (21487): [<ffffffff9e2159f2>] run_ksoftirqd+0x32/0x60 [ 161.240334] other info that might help us debug this: [ 161.246860] Possible unsafe locking scenario: [ 161.252780] CPU0 [ 161.255232] ---- [ 161.257685] lock(&xa->xa_lock#15); [ 161.261265] <Interrupt> [ 161.263889] lock(&xa->xa_lock#15); [ 161.267644] *** DEADLOCK *** [ 161.273561] no locks held by ksoftirqd/25/163. [ 161.278009] stack backtrace: [ 161.282368] CPU: 25 PID: 163 Comm: ksoftirqd/25 Tainted: G S W I 5.18.0-rc1.yanjun.v1+ #2 [ 161.291493] Hardware name: Dell Inc. PowerEdge R640/06NR82, BIOS 2.11.2 004/21/2021 [ 161.299146] Call Trace: [ 161.301597] <TASK> [ 161.303705] dump_stack_lvl+0x44/0x57 [ 161.307370] mark_lock.part.52.cold.79+0x3c/0x46 [ 161.311992] ? lock_chain_count+0x20/0x20 [ 161.316003] ? rxe_do_task+0x26/0x230 [rdma_rxe] [ 161.320628] ? orc_find.part.4+0x310/0x310 [ 161.324731] ? __module_text_address.part.55+0x13/0x140 [ 161.329954] ? rxe_do_task+0x26/0x230 [rdma_rxe] [ 161.334573] ? rxe_do_task+0x26/0x230 [rdma_rxe] [ 161.339192] ? is_module_text_address+0x41/0x60 [ 161.343726] ? rxe_do_task+0x26/0x230 [rdma_rxe] [ 161.348345] ? kernel_text_address+0x13/0xd0 [ 161.352616] ? create_prof_cpu_mask+0x20/0x20 [ 161.356979] ? sched_clock_cpu+0x15/0x200 [ 161.360991] __lock_acquire+0x1565/0x34a0 [ 161.365003] ? rcu_read_lock_sched_held+0xaf/0xe0 [ 161.369709] ? rcu_read_lock_bh_held+0xc0/0xc0 [ 161.374153] lock_acquire+0x1d2/0x5a0 [ 161.377820] ? rxe_pool_get_index+0x72/0x1d0 [rdma_rxe] [ 161.383055] ? rcu_read_unlock+0x50/0x50 [ 161.386981] ? mark_lock.part.52+0xa3d/0x1c00 [ 161.391338] ? _raw_spin_lock_irqsave+0x69/0x90 [ 161.395873] _raw_spin_lock_irqsave+0x42/0x90 [ 161.400230] ? rxe_pool_get_index+0x72/0x1d0 [rdma_rxe] [ 161.405456] rxe_pool_get_index+0x72/0x1d0 [rdma_rxe] [ 161.410509] ? __rxe_add_to_pool+0x260/0x260 [rdma_rxe] [ 161.415735] ? __rxe_get+0xc1/0x140 [rdma_rxe] [ 161.420183] rxe_get_av+0x168/0x2a0 [rdma_rxe] [ 161.424635] ? lockdep_lock+0xcb/0x1c0 [ 161.428387] rxe_requester+0x75b/0x4a90 [rdma_rxe] [ 161.433182] ? rxe_do_task+0xe2/0x230 [rdma_rxe] [ 161.437809] ? sched_clock_cpu+0x15/0x200 [ 161.441819] ? find_held_lock+0x3a/0x1c0 [ 161.445746] ? rnr_nak_timer+0x80/0x80 [rdma_rxe] [ 161.450453] ? lock_release+0x42f/0xc90 [ 161.454293] ? lock_downgrade+0x6b0/0x6b0 [ 161.458304] ? lock_acquired+0x262/0xb10 [ 161.462233] ? __local_bh_enable_ip+0xa8/0x110 [ 161.466677] ? rnr_nak_timer+0x80/0x80 [rdma_rxe] [ 161.471389] rxe_do_task+0x134/0x230 [rdma_rxe] [ 161.475925] tasklet_action_common.isra.12+0x1f7/0x2d0 [ 161.481064] __do_softirq+0x1ea/0xa4c [ 161.484730] ? tasklet_kill+0x1c0/0x1c0 [ 161.488567] run_ksoftirqd+0x32/0x60 [ 161.492146] smpboot_thread_fn+0x503/0x860 [ 161.496245] ? sort_range+0x20/0x20 [ 161.499736] kthread+0x29b/0x340 [ 161.502970] ? kthread_complete_and_exit+0x20/0x20 [ 161.507763] ret_from_fork+0x1f/0x30 [ 161.511346] </TASK> On Sat, Apr 9, 2022 at 11:27 AM Yanjun Zhu <yanjun.zhu@xxxxxxxxx> wrote: > > 在 2022/4/8 17:10, Yi Zhang 写道: > > On Fri, Apr 8, 2022 at 1:09 PM Yanjun Zhu <yanjun.zhu@xxxxxxxxx> wrote: > >> > >> > >> Hi, all > >> > >> In 5.18-rc1, this commit "[PATCH for-next] RDMA/rxe: Revert changes from > >> irqsave to bh locks" does not exist. > >> > >> The link is > >> https://patchwork.kernel.org/project/linux-rdma/patch/20220215194448.44369-1-rpearsonhpe@xxxxxxxxx/ > >> > > Hi Yanjun > > I tried rdma/for-next which already included this commit, and this > > issue still can be reproduced. > > Hi, Yi > > I delved into the source code. And I found the followings: > > xa_lock first is acquired in this: > > [ 296.655588] {SOFTIRQ-ON-W} state was registered at: > > [ 296.660467] lock_acquire+0x1d2/0x5a0 > [ 296.664221] _raw_spin_lock+0x33/0x80 > [ 296.667972] __rxe_add_to_pool+0x183/0x230 [rdma_rxe] > [ 296.673112] __ib_alloc_pd+0xf9/0x550 [ib_core] > [ 296.677758] ib_mad_init_device+0x2d9/0xd20 [ib_core] > [ 296.682924] add_client_context+0x2fa/0x450 [ib_core] > [ 296.688088] enable_device_and_get+0x1b7/0x350 [ib_core] > [ 296.693503] ib_register_device+0x757/0xaf0 [ib_core] > [ 296.698660] rxe_register_device+0x2eb/0x390 [rdma_rxe] > [ 296.703973] rxe_net_add+0x83/0xc0 [rdma_rxe] > [ 296.708421] rxe_newlink+0x76/0x90 [rdma_rxe] > [ 296.712865] nldev_newlink+0x245/0x3e0 [ib_core] > [ 296.717597] rdma_nl_rcv_msg+0x2d4/0x790 [ib_core] > [ 296.722492] rdma_nl_rcv+0x1ca/0x3f0 [ib_core] > [ 296.727042] netlink_unicast+0x43b/0x640 > [ 296.731056] netlink_sendmsg+0x7eb/0xc40 > [ 296.735069] sock_sendmsg+0xe0/0x110 > [ 296.738734] __sys_sendto+0x1d7/0x2b0 > [ 296.742486] __x64_sys_sendto+0xdd/0x1b0 > [ 296.746500] do_syscall_64+0x37/0x80 > [ 296.750166] entry_SYSCALL_64_after_hwframe+0x44/0xae > [ 296.755304] irq event stamp: 25305 > [ 296.758710] hardirqs last enabled at (25304): [<ffffffff89815de8>] > __local_bh_enable_ip+0xa8/0x110 > [ 296.767750] hardirqs last disabled at (25305): [<ffffffff8b970219>] > _raw_spin_lock_irqsave+0x69/0x90 > [ 296.776875] softirqs last enabled at (25294): [<ffffffff8bc0064a>] > __do_softirq+0x64a/0xa4c > [ 296.785307] softirqs last disabled at (25299): [<ffffffff898159f2>] > run_ksoftirqd+0x32/0x60 > [ 296.793654] > > xa_lock then is acquired in this: > {IN-SOFTIRQ-W}: > > stack backtrace: > [ 296.835686] CPU: 30 PID: 188 Comm: ksoftirqd/30 Tainted: G S > I 5.18.0-rc1 #1 > [ 296.843859] Hardware name: Dell Inc. PowerEdge R640/06NR82, BIOS > 2.11.2 004/21/2021 > [ 296.851509] Call Trace: > [ 296.853964] <TASK> > [ 296.856070] dump_stack_lvl+0x44/0x57 > [ 296.859734] mark_lock.part.52.cold.79+0x3c/0x46 > [ 296.913364] __lock_acquire+0x1565/0x34a0 > [ 296.926529] lock_acquire+0x1d2/0x5a0 > [ 296.948247] _raw_spin_lock_irqsave+0x42/0x90 > [ 296.957830] rxe_pool_get_index+0x72/0x1d0 [rdma_rxe] > [ 296.972554] rxe_get_av+0x168/0x2a0 [rdma_rxe] > [ 296.980761] rxe_requester+0x75b/0x4a90 [rdma_rxe] > [ 297.023764] rxe_do_task+0x134/0x230 [rdma_rxe] > [ 297.028297] tasklet_action_common.isra.12+0x1f7/0x2d0 > [ 297.033435] __do_softirq+0x1ea/0xa4c > [ 297.040941] run_ksoftirqd+0x32/0x60 > [ 297.044518] smpboot_thread_fn+0x503/0x860 > [ 297.052110] kthread+0x29b/0x340 > [ 297.060137] ret_from_fork+0x1f/0x30 > [ 297.063720] </TASK> > > From the above, in the function __rxe_add_to_pool, xa_lock is acquired. > Then the function __rxe_add_to_pool is interrupted by softirq. The > function rxe_pool_get_index will also acquire xa_lock. > > Finally, the dead lock appears. > > [ 296.806097] CPU0 > [ 296.808550] ---- > [ 296.811003] lock(&xa->xa_lock#15); <----- __rxe_add_to_pool > [ 296.814583] <Interrupt> > [ 296.817209] lock(&xa->xa_lock#15); <---- rxe_pool_get_index > [ 296.820961] > *** DEADLOCK *** > > I disable softirq in the function __rxe_add_to_pool. Please make tests > with the following. > Please let me know the test results. Thanks a lot. > > diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c > b/drivers/infiniband/sw/rxe/rxe_pool.c > index 87066d04ed18..9a8f83787d61 100644 > --- a/drivers/infiniband/sw/rxe/rxe_pool.c > +++ b/drivers/infiniband/sw/rxe/rxe_pool.c > @@ -166,10 +166,14 @@ int __rxe_add_to_pool(struct rxe_pool *pool, > struct rxe_pool_elem *elem) > elem->obj = (u8 *)elem - pool->elem_offset; > kref_init(&elem->ref_cnt); > > + local_bh_disable(); > err = xa_alloc_cyclic(&pool->xa, &elem->index, elem, pool->limit, > &pool->next, GFP_KERNEL); > - if (err) > + if (err) { > + local_bh_enable(); > goto err_cnt; > + } > + local_bh_enable(); > > return 0; > > Zhu Yanjun > > > > >> Please apply this commit and make tests again. > >> Please let me know the test result. > >> > >> Best Regards, > >> > >> Zhu Yanjun > >> > >> 在 2022/4/6 11:08, Yi Zhang 写道: > >>> Hello > >>> > >>> Below WARNING triggered during blktests srp/ tests with 5.18.0-rc1 > >>> debug kernel, pls help check it, let me know if you need any info for > >>> it, thanks. > >>> > >>> [ 290.308984] run blktests srp/001 at 2022-04-05 23:01:02 > >>> [ 290.999913] null_blk: module loaded > >>> [ 291.260285] device-mapper: multipath service-time: version 0.3.0 loaded > >>> [ 291.262990] device-mapper: table: 253:3: multipath: error getting > >>> device (-EBUSY) > >>> [ 291.270535] device-mapper: ioctl: error adding target to table > >>> [ 291.362284] rdma_rxe: loaded > >>> [ 291.428444] infiniband eno1_rxe: set active > >>> [ 291.428462] infiniband eno1_rxe: added eno1 > >>> [ 291.467142] eno2 speed is unknown, defaulting to 1000 > >>> [ 291.472327] eno2 speed is unknown, defaulting to 1000 > >>> [ 291.477680] eno2 speed is unknown, defaulting to 1000 > >>> [ 291.516123] infiniband eno2_rxe: set down > >>> [ 291.516130] infiniband eno2_rxe: added eno2 > >>> [ 291.516649] eno2 speed is unknown, defaulting to 1000 > >>> [ 291.542551] eno2 speed is unknown, defaulting to 1000 > >>> [ 291.558995] eno3 speed is unknown, defaulting to 1000 > >>> [ 291.564127] eno3 speed is unknown, defaulting to 1000 > >>> [ 291.569462] eno3 speed is unknown, defaulting to 1000 > >>> [ 291.607876] infiniband eno3_rxe: set down > >>> [ 291.607883] infiniband eno3_rxe: added eno3 > >>> [ 291.608430] eno3 speed is unknown, defaulting to 1000 > >>> [ 291.632891] eno2 speed is unknown, defaulting to 1000 > >>> [ 291.638180] eno3 speed is unknown, defaulting to 1000 > >>> [ 291.655089] eno4 speed is unknown, defaulting to 1000 > >>> [ 291.660213] eno4 speed is unknown, defaulting to 1000 > >>> [ 291.665569] eno4 speed is unknown, defaulting to 1000 > >>> [ 291.703975] infiniband eno4_rxe: set down > >>> [ 291.703982] infiniband eno4_rxe: added eno4 > >>> [ 291.704642] eno4 speed is unknown, defaulting to 1000 > >>> [ 291.822650] scsi_debug:sdebug_add_store: dif_storep 524288 bytes @ > >>> ffffc90001801000 > >>> [ 291.825441] scsi_debug:sdebug_driver_probe: scsi_debug: trim > >>> poll_queues to 0. poll_q/nr_hw = (0/1) > >>> [ 291.834505] scsi_debug:sdebug_driver_probe: host protection DIF3 DIX3 > >>> [ 291.834513] scsi host15: scsi_debug: version 0191 [20210520] > >>> dev_size_mb=32, opts=0x0, submit_queues=1, statistics=0 > >>> [ 291.837267] scsi 15:0:0:0: Direct-Access Linux scsi_debug > >>> 0191 PQ: 0 ANSI: 7 > >>> [ 291.839793] sd 15:0:0:0: Power-on or device reset occurred > >>> [ 291.840110] sd 15:0:0:0: Attached scsi generic sg1 type 0 > >>> [ 291.845521] sd 15:0:0:0: [sdb] Enabling DIF Type 3 protection > >>> [ 291.845878] sd 15:0:0:0: [sdb] 65536 512-byte logical blocks: (33.6 > >>> MB/32.0 MiB) > >>> [ 291.845939] sd 15:0:0:0: [sdb] Write Protect is off > >>> [ 291.845954] sd 15:0:0:0: [sdb] Mode Sense: 73 00 10 08 > >>> [ 291.846049] sd 15:0:0:0: [sdb] Write cache: enabled, read cache: > >>> enabled, supports DPO and FUA > >>> [ 291.846254] sd 15:0:0:0: [sdb] Optimal transfer size 524288 bytes > >>> [ 291.859380] sd 15:0:0:0: [sdb] Enabling DIX T10-DIF-TYPE3-CRC protection > >>> [ 291.859398] sd 15:0:0:0: [sdb] DIF application tag size 6 > >>> [ 291.860158] sd 15:0:0:0: [sdb] Attached SCSI disk > >>> [ 292.666414] eno2 speed is unknown, defaulting to 1000 > >>> [ 292.771984] eno3 speed is unknown, defaulting to 1000 > >>> [ 292.876762] eno4 speed is unknown, defaulting to 1000 > >>> [ 293.033291] Rounding down aligned max_sectors from 4294967295 to 4294967288 > >>> [ 293.102261] ib_srpt:srpt_add_one: ib_srpt device = 0000000047a39f45 > >>> [ 293.102363] ib_srpt:srpt_use_srq: ib_srpt srpt_use_srq(eno1_rxe): > >>> use_srq = 0; ret = 0 > >>> [ 293.102369] ib_srpt:srpt_add_one: ib_srpt Target login info: > >>> id_ext=f2d4e2fffee6e1e0,ioc_guid=f2d4e2fffee6e1e0,pkey=ffff,service_id=f2d4e2fffee6e1e0 > >>> [ 293.102680] ib_srpt:srpt_add_one: ib_srpt added eno1_rxe. > >>> [ 293.102692] ib_srpt:srpt_add_one: ib_srpt device = 00000000b2dfcbe9 > >>> [ 293.102725] ib_srpt:srpt_use_srq: ib_srpt srpt_use_srq(eno2_rxe): > >>> use_srq = 0; ret = 0 > >>> [ 293.102730] ib_srpt:srpt_add_one: ib_srpt Target login info: > >>> id_ext=f2d4e2fffee6e1e0,ioc_guid=f2d4e2fffee6e1e0,pkey=ffff,service_id=f2d4e2fffee6e1e0 > >>> [ 293.102741] eno2 speed is unknown, defaulting to 1000 > >>> [ 293.107884] ib_srpt:srpt_add_one: ib_srpt added eno2_rxe. > >>> [ 293.107893] ib_srpt:srpt_add_one: ib_srpt device = 0000000061e03247 > >>> [ 293.107922] ib_srpt:srpt_use_srq: ib_srpt srpt_use_srq(eno3_rxe): > >>> use_srq = 0; ret = 0 > >>> [ 293.107926] ib_srpt:srpt_add_one: ib_srpt Target login info: > >>> id_ext=f2d4e2fffee6e1e0,ioc_guid=f2d4e2fffee6e1e0,pkey=ffff,service_id=f2d4e2fffee6e1e0 > >>> [ 293.107936] eno3 speed is unknown, defaulting to 1000 > >>> [ 293.113038] ib_srpt:srpt_add_one: ib_srpt added eno3_rxe. > >>> [ 293.113046] ib_srpt:srpt_add_one: ib_srpt device = 00000000c0e3d43d > >>> [ 293.113081] ib_srpt:srpt_use_srq: ib_srpt srpt_use_srq(eno4_rxe): > >>> use_srq = 0; ret = 0 > >>> [ 293.113085] ib_srpt:srpt_add_one: ib_srpt Target login info: > >>> id_ext=f2d4e2fffee6e1e0,ioc_guid=f2d4e2fffee6e1e0,pkey=ffff,service_id=f2d4e2fffee6e1e0 > >>> [ 293.113096] eno4 speed is unknown, defaulting to 1000 > >>> [ 293.118198] ib_srpt:srpt_add_one: ib_srpt added eno4_rxe. > >>> [ 293.584001] Rounding down aligned max_sectors from 255 to 248 > >>> [ 293.654030] Rounding down aligned max_sectors from 255 to 248 > >>> [ 293.724363] Rounding down aligned max_sectors from 4294967295 to 4294967288 > >>> [ 296.450772] ib_srp:srp_add_one: ib_srp: srp_add_one: > >>> 18446744073709551615 / 4096 = 4503599627370495 <> 512 > >>> [ 296.450783] ib_srp:srp_add_one: ib_srp: eno1_rxe: mr_page_shift = > >>> 12, device->max_mr_size = 0xffffffffffffffff, > >>> device->max_fast_reg_page_list_len = 512, max_pages_per_mr = 512, > >>> mr_max_size = 0x200000 > >>> [ 296.451222] ib_srp:srp_add_one: ib_srp: srp_add_one: > >>> 18446744073709551615 / 4096 = 4503599627370495 <> 512 > >>> [ 296.451229] ib_srp:srp_add_one: ib_srp: eno2_rxe: mr_page_shift = > >>> 12, device->max_mr_size = 0xffffffffffffffff, > >>> device->max_fast_reg_page_list_len = 512, max_pages_per_mr = 512, > >>> mr_max_size = 0x200000 > >>> [ 296.451517] ib_srp:srp_add_one: ib_srp: srp_add_one: > >>> 18446744073709551615 / 4096 = 4503599627370495 <> 512 > >>> [ 296.451523] ib_srp:srp_add_one: ib_srp: eno3_rxe: mr_page_shift = > >>> 12, device->max_mr_size = 0xffffffffffffffff, > >>> device->max_fast_reg_page_list_len = 512, max_pages_per_mr = 512, > >>> mr_max_size = 0x200000 > >>> [ 296.451769] ib_srp:srp_add_one: ib_srp: srp_add_one: > >>> 18446744073709551615 / 4096 = 4503599627370495 <> 512 > >>> [ 296.451774] ib_srp:srp_add_one: ib_srp: eno4_rxe: mr_page_shift = > >>> 12, device->max_mr_size = 0xffffffffffffffff, > >>> device->max_fast_reg_page_list_len = 512, max_pages_per_mr = 512, > >>> mr_max_size = 0x200000 > >>> [ 296.605925] ib_srp:srp_parse_in: ib_srp: 10.16.221.116 -> 10.16.221.116:0 > >>> [ 296.605956] ib_srp:srp_parse_in: ib_srp: 10.16.221.116:5555 -> > >>> 10.16.221.116:5555 > >>> [ 296.606014] ib_srp:add_target_store: ib_srp: max_sectors = 1024; > >>> max_pages_per_mr = 512; mr_page_size = 4096; max_sectors_per_mr = > >>> 4096; mr_per_cmd = 2 > >>> [ 296.606021] ib_srp:srp_max_it_iu_len: ib_srp: max_iu_len = 8260 > >>> > >>> [ 296.616660] ================================ > >>> [ 296.620931] WARNING: inconsistent lock state > >>> [ 296.625207] 5.18.0-rc1 #1 Tainted: G S I > >>> [ 296.630259] -------------------------------- > >>> [ 296.634531] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. > >>> [ 296.640535] ksoftirqd/30/188 [HC0[0]:SC1[1]:HE0:SE0] takes: > >>> [ 296.646106] ffff888151491468 (&xa->xa_lock#15){+.?.}-{2:2}, at: > >>> rxe_pool_get_index+0x72/0x1d0 [rdma_rxe] > >>> [ 296.655588] {SOFTIRQ-ON-W} state was registered at: > >>> [ 296.660467] lock_acquire+0x1d2/0x5a0 > >>> [ 296.664221] _raw_spin_lock+0x33/0x80 > >>> [ 296.667972] __rxe_add_to_pool+0x183/0x230 [rdma_rxe] > >>> [ 296.673112] __ib_alloc_pd+0xf9/0x550 [ib_core] > >>> [ 296.677758] ib_mad_init_device+0x2d9/0xd20 [ib_core] > >>> [ 296.682924] add_client_context+0x2fa/0x450 [ib_core] > >>> [ 296.688088] enable_device_and_get+0x1b7/0x350 [ib_core] > >>> [ 296.693503] ib_register_device+0x757/0xaf0 [ib_core] > >>> [ 296.698660] rxe_register_device+0x2eb/0x390 [rdma_rxe] > >>> [ 296.703973] rxe_net_add+0x83/0xc0 [rdma_rxe] > >>> [ 296.708421] rxe_newlink+0x76/0x90 [rdma_rxe] > >>> [ 296.712865] nldev_newlink+0x245/0x3e0 [ib_core] > >>> [ 296.717597] rdma_nl_rcv_msg+0x2d4/0x790 [ib_core] > >>> [ 296.722492] rdma_nl_rcv+0x1ca/0x3f0 [ib_core] > >>> [ 296.727042] netlink_unicast+0x43b/0x640 > >>> [ 296.731056] netlink_sendmsg+0x7eb/0xc40 > >>> [ 296.735069] sock_sendmsg+0xe0/0x110 > >>> [ 296.738734] __sys_sendto+0x1d7/0x2b0 > >>> [ 296.742486] __x64_sys_sendto+0xdd/0x1b0 > >>> [ 296.746500] do_syscall_64+0x37/0x80 > >>> [ 296.750166] entry_SYSCALL_64_after_hwframe+0x44/0xae > >>> [ 296.755304] irq event stamp: 25305 > >>> [ 296.758710] hardirqs last enabled at (25304): [<ffffffff89815de8>] > >>> __local_bh_enable_ip+0xa8/0x110 > >>> [ 296.767750] hardirqs last disabled at (25305): [<ffffffff8b970219>] > >>> _raw_spin_lock_irqsave+0x69/0x90 > >>> [ 296.776875] softirqs last enabled at (25294): [<ffffffff8bc0064a>] > >>> __do_softirq+0x64a/0xa4c > >>> [ 296.785307] softirqs last disabled at (25299): [<ffffffff898159f2>] > >>> run_ksoftirqd+0x32/0x60 > >>> [ 296.793654] > >>> other info that might help us debug this: > >>> [ 296.800177] Possible unsafe locking scenario: > >>> > >>> [ 296.806097] CPU0 > >>> [ 296.808550] ---- > >>> [ 296.811003] lock(&xa->xa_lock#15); > >>> [ 296.814583] <Interrupt> > >>> [ 296.817209] lock(&xa->xa_lock#15); > >>> [ 296.820961] > >>> *** DEADLOCK *** > >>> > >>> [ 296.826880] no locks held by ksoftirqd/30/188. > >>> [ 296.831326] > >>> stack backtrace: > >>> [ 296.835686] CPU: 30 PID: 188 Comm: ksoftirqd/30 Tainted: G S > >>> I 5.18.0-rc1 #1 > >>> [ 296.843859] Hardware name: Dell Inc. PowerEdge R640/06NR82, BIOS > >>> 2.11.2 004/21/2021 > >>> [ 296.851509] Call Trace: > >>> [ 296.853964] <TASK> > >>> [ 296.856070] dump_stack_lvl+0x44/0x57 > >>> [ 296.859734] mark_lock.part.52.cold.79+0x3c/0x46 > >>> [ 296.864355] ? lock_chain_count+0x20/0x20 > >>> [ 296.868367] ? rxe_do_task+0x26/0x230 [rdma_rxe] > >>> [ 296.872994] ? orc_find.part.4+0x310/0x310 > >>> [ 296.877096] ? __module_text_address.part.55+0x13/0x140 > >>> [ 296.882326] ? rxe_do_task+0x26/0x230 [rdma_rxe] > >>> [ 296.886947] ? rxe_do_task+0x26/0x230 [rdma_rxe] > >>> [ 296.891566] ? is_module_text_address+0x41/0x60 > >>> [ 296.896098] ? rxe_do_task+0x26/0x230 [rdma_rxe] > >>> [ 296.900718] ? kernel_text_address+0x13/0xd0 > >>> [ 296.904991] ? create_prof_cpu_mask+0x20/0x20 > >>> [ 296.909351] ? sched_clock_cpu+0x15/0x200 > >>> [ 296.913364] __lock_acquire+0x1565/0x34a0 > >>> [ 296.917377] ? rcu_read_lock_sched_held+0xaf/0xe0 > >>> [ 296.922079] ? rcu_read_lock_bh_held+0xc0/0xc0 > >>> [ 296.926529] lock_acquire+0x1d2/0x5a0 > >>> [ 296.930193] ? rxe_pool_get_index+0x72/0x1d0 [rdma_rxe] > >>> [ 296.935429] ? rcu_read_unlock+0x50/0x50 > >>> [ 296.939353] ? mark_lock.part.52+0xa3d/0x1c00 > >>> [ 296.943712] ? _raw_spin_lock_irqsave+0x69/0x90 > >>> [ 296.948247] _raw_spin_lock_irqsave+0x42/0x90 > >>> [ 296.952603] ? rxe_pool_get_index+0x72/0x1d0 [rdma_rxe] > >>> [ 296.957830] rxe_pool_get_index+0x72/0x1d0 [rdma_rxe] > >>> [ 296.962882] ? __rxe_add_to_pool+0x230/0x230 [rdma_rxe] > >>> [ 296.968108] ? __rxe_get+0xc1/0x140 [rdma_rxe] > >>> [ 296.972554] rxe_get_av+0x168/0x2a0 [rdma_rxe] > >>> [ 296.977007] ? lockdep_lock+0xcb/0x1c0 > >>> [ 296.980761] rxe_requester+0x75b/0x4a90 [rdma_rxe] > >>> [ 296.985557] ? rxe_do_task+0xe2/0x230 [rdma_rxe] > >>> [ 296.990183] ? sched_clock_cpu+0x15/0x200 > >>> [ 296.994193] ? find_held_lock+0x3a/0x1c0 > >>> [ 296.998119] ? rnr_nak_timer+0x80/0x80 [rdma_rxe] > >>> [ 297.002826] ? lock_release+0x42f/0xc90 > >>> [ 297.006664] ? lock_downgrade+0x6b0/0x6b0 > >>> [ 297.010676] ? lock_acquired+0x262/0xb10 > >>> [ 297.014605] ? __local_bh_enable_ip+0xa8/0x110 > >>> [ 297.019051] ? rnr_nak_timer+0x80/0x80 [rdma_rxe] > >>> [ 297.023764] rxe_do_task+0x134/0x230 [rdma_rxe] > >>> [ 297.028297] tasklet_action_common.isra.12+0x1f7/0x2d0 > >>> [ 297.033435] __do_softirq+0x1ea/0xa4c > >>> [ 297.037100] ? tasklet_kill+0x1c0/0x1c0 > >>> [ 297.040941] run_ksoftirqd+0x32/0x60 > >>> [ 297.044518] smpboot_thread_fn+0x503/0x860 > >>> [ 297.048618] ? sort_range+0x20/0x20 > >>> [ 297.052110] kthread+0x29b/0x340 > >>> [ 297.055342] ? kthread_complete_and_exit+0x20/0x20 > >>> [ 297.060137] ret_from_fork+0x1f/0x30 > >>> [ 297.063720] </TASK> > >>> > >> > > > > > -- Best Regards, Yi Zhang