Hi, all
I confronted the following problem. The call traces are as below.
kernel/fork.c:
"
2323 spin_lock_irq(¤t->sighand->siglock); <---disable
2324 if (!(clone_flags & CLONE_THREAD))
2325 hlist_add_head(&delayed.node,
¤t->signal->multiprocess);
2326 recalc_sigpending();
2327 spin_unlock_irq(¤t->sighand->siglock); <--enable
"
conflicts with the following
"
1031 spin_lock_irqsave(&qp_info->send_queue.lock, flags); <---save
1032 if (qp_info->send_queue.count <
qp_info->send_queue.max_active) {
1033 trace_ib_mad_ib_send_mad(mad_send_wr, qp_info);
1034 ret = ib_post_send(mad_agent->qp,
&mad_send_wr->send_wr.wr,
1035 NULL);
1036 list = &qp_info->send_queue.list;
1037 } else {
1038 ret = 0;
1039 list = &qp_info->overflow_list;
1040 }
1041
1042 if (!ret) {
1043 qp_info->send_queue.count++;
1044 list_add_tail(&mad_send_wr->mad_list.list, list);
1045 }
1046 spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); <--restore
"
If we change spin_lock_irq/spin_unlock_irq to
spin_lock_irqsave/spin_unlock_irqrestore, it seems that this problem is
resolved.
But not sure if other problems are introduced.
[ 6020.091840] ------------[ cut here ]------------
[ 6020.091846] raw_local_irq_restore() called with IRQs enabled
[ 6020.091857] WARNING: CPU: 82 PID: 10603 at
kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x21/0x30
[ 6020.091872] Modules linked in: rdma_rxe ip6_udp_tunnel udp_tunnel
xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4
nft_compat nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6
nf_defrag_ipv4 nf_tables nfnetlink tun bridge stp llc vfat fat ext4
mbcache jbd2 rpcrdma sunrpc intel_rapl_msr intel_rapl_common rdma_ucm
i10nm_edac ib_srpt nfit ib_isert libnvdimm iscsi_target_mod
target_core_mod x86_pkg_temp_thermal ib_iser intel_powerclamp libiscsi
coretemp scsi_transport_iscsi ib_umad rdma_cm ib_ipoib iw_cm kvm_intel
ib_cm ipmi_ssif kvm mlx5_ib i40e irqbypass crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel ib_uverbs sha512_ssse3 iTCO_wdt rapl
iTCO_vendor_support mei_me intel_cstate ib_core joydev acpi_ipmi
intel_uncore mei ipmi_si pcspkr i2c_i801 dax_hmem isst_if_mmio
isst_if_mbox_pci wmi_bmof isst_if_common intel_pch_thermal i2c_smbus
ipmi_devintf ipmi_msghandler acpi_power_meter ip_tables xfs libcrc32c
sd_mod t10_pi crc64_rocksoft crc64 sg mgag200 mlx5_core drm_kms_helper
syscopyarea mlxfw sysfillrect
[ 6020.092063] sysimgblt tls i2c_algo_bit ahci drm_shmem_helper libahci
ice pci_hyperv_intf crc32c_intel drm psample megaraid_sas libata tg3 wmi
dm_mirror dm_region_hash dm_log dm_mod fuse [last unloaded: irdma]
[ 6020.092108] CPU: 82 PID: 10603 Comm: rping Kdump: loaded Tainted: G
S B 6.4.0-rc1+ #30
[ 6020.092115] Hardware name: Dell Inc. PowerEdge R750/06V45N, BIOS
1.2.4 05/28/2021
[ 6020.092119] RIP: 0010:warn_bogus_irq_restore+0x21/0x30
[ 6020.092126] Code: 90 90 90 90 90 90 90 90 90 80 3d 35 50 79 01 00 74
05 c3 cc cc cc cc 48 c7 c7 a0 d7 e9 ae c6 05 20 50 79 01 01 e8 1f 15 da
fe <0f> 0b c3 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90
[ 6020.092131] RSP: 0018:ff11000180e477e8 EFLAGS: 00010286
[ 6020.092137] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
0000000000000000
[ 6020.092141] RDX: 0000000000000004 RSI: dffffc0000000000 RDI:
ffffffffb27b31c0
[ 6020.092144] RBP: ff110001175d69e8 R08: ffe21c02006d7f6a R09:
ffe21c02006d7f6a
[ 6020.092148] R10: ff110010036bfb4b R11: ffe21c02006d7f69 R12:
ff110001175d6a28
[ 6020.092152] R13: ff110001175d6a30 R14: ff110001175d69e8 R15:
0000000000000000
[ 6020.092155] FS: 00007f215281c740(0000) GS:ff11001003680000(0000)
knlGS:0000000000000000
[ 6020.092160] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6020.092163] CR2: 00007f2147fffda0 CR3: 00000001a1b2c005 CR4:
0000000000771ee0
[ 6020.092167] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 6020.092170] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 6020.092173] PKRU: 55555554
[ 6020.092175] Call Trace:
[ 6020.092178] <TASK>
[ 6020.092181] _raw_spin_unlock_irqrestore+0x67/0x70
[ 6020.092190] ib_send_mad+0x3fa/0x7d0 [ib_core]
[ 6020.092299] ? __pfx_ib_send_mad+0x10/0x10 [ib_core]
[ 6020.092429] ib_post_send_mad+0x338/0x4c0 [ib_core]
[ 6020.092519] ib_send_cm_rep+0x4b0/0x790 [ib_cm]
[ 6020.092553] rdma_accept+0x432/0x550 [rdma_cm]
[ 6020.092585] ? __pfx_rdma_accept+0x10/0x10 [rdma_cm]
[ 6020.092613] ? do_raw_spin_unlock+0x97/0x130
[ 6020.092623] ? preempt_count_sub+0x14/0xc0
[ 6020.092632] ? _raw_spin_unlock+0x29/0x50
[ 6020.092637] ? ucma_get_ctx+0xab/0x180 [rdma_ucm]
[ 6020.092650] ? check_stack_object+0x22/0x70
[ 6020.092659] ucma_accept+0x1e7/0x2e0 [rdma_ucm]
[ 6020.092671] ? __pfx_ucma_accept+0x10/0x10 [rdma_ucm]
[ 6020.092683] ?
__pfx_ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x10/0x10 [ib_uverbs]
[ 6020.092720] ? _find_next_bit+0x37/0xc0
[ 6020.092741] ucma_write+0x139/0x1f0 [rdma_ucm]
[ 6020.092752] ? __pfx_ucma_write+0x10/0x10 [rdma_ucm]
[ 6020.092764] ? security_file_permission+0x4b/0x2b0
[ 6020.092774] vfs_write+0x161/0x740
[ 6020.092781] ? ib_uverbs_ioctl+0x17f/0x210 [ib_uverbs]
[ 6020.092815] ? __pfx_vfs_write+0x10/0x10
[ 6020.092822] ? __fget_files+0x158/0x230
[ 6020.092831] ? __fget_light+0xe2/0x100
[ 6020.092838] ksys_write+0x13f/0x160
[ 6020.092843] ? __pfx_ksys_write+0x10/0x10
[ 6020.092847] ? ktime_get_coarse_real_ts64+0x107/0x120
[ 6020.092854] ? ktime_get_coarse_real_ts64+0xaf/0x120
[ 6020.092863] do_syscall_64+0x37/0x90
[ 6020.092870] entry_SYSCALL_64_after_hwframe+0x72/0xdc
[ 6020.092877] RIP: 0033:0x7f2151e11847
[ 6020.092882] Code: c3 66 90 41 54 49 89 d4 55 48 89 f5 53 89 fb 48 83
ec 10 e8 1b fd ff ff 4c 89 e2 48 89 ee 89 df 41 89 c0 b8 01 00 00 00 0f
05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 48 89 44 24 08 e8 54 fd ff ff 48
[ 6020.092886] RSP: 002b:00007ffc2439a0f0 EFLAGS: 00000293 ORIG_RAX:
0000000000000001
[ 6020.092892] RAX: ffffffffffffffda RBX: 0000000000000003 RCX:
00007f2151e11847
[ 6020.092896] RDX: 0000000000000130 RSI: 00007ffc2439a120 RDI:
0000000000000003
[ 6020.092899] RBP: 00007ffc2439a120 R08: 0000000000000000 R09:
0000000000000000
[ 6020.092902] R10: 00000000ffffffff R11: 0000000000000293 R12:
0000000000000130
[ 6020.092905] R13: 0000000000000011 R14: 0000000000000000 R15:
000055c0ea6ffa18
[ 6020.092914] </TASK>
[ 6020.092917] irq event stamp: 0
[ 6020.092919] hardirqs last enabled at (0): [<0000000000000000>] 0x0
[ 6020.092923] hardirqs last disabled at (0): [<ffffffffad94dae6>]
copy_process+0x13e6/0x3720
[ 6020.092931] softirqs last enabled at (0): [<ffffffffad94dae6>]
copy_process+0x13e6/0x3720
[ 6020.092936] softirqs last disabled at (0): [<0000000000000000>] 0x0
[ 6020.092939] ---[ end trace 0000000000000000 ]---
Zhu Yanjun
