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
