[dpdk-users] [18.11] KNI exception

[dpdk-users] [18.11] KNI exception

[Giridharan, Ganesan]

Good morning.

I am looking for some guidance to address the KNI kthread oops. The problem seems to occur after about 19+ hours of test.  Appreciate the help.

Setup:

Linux Kernel : 4.19.20
DPDK : 18.11
KNI Kthread mode : multiple
Patches applied : http://patches.dpdk.org/patch/51109/
Gcc version : 5.5.0
Platform : Azure

Stack:

-F2s:~# [74438.211573] BUG: unable to handle kernel paging request at ffff88700a6f9807
[74438.212543] PGD 0 P4D 0
[74438.212543] Oops: 0000 [#1] PREEMPT SMP PTI
[74438.212543] CPU: 1 PID: 2562 Comm: kni_pkt0 Tainted: G           O      4.19.20 #0
[74438.212543] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090007  06/02/2017
[74438.212543] RIP: 0010:kni_net_rx_normal+0x125/0x330 [rte_kni]
[74438.212543] Code: 00 00 00 00 80 88 ff ff 48 8d b9 b8 01 00 00 48 8d 84 c1 c0 01 00 00 48 89 7d a8 48 89 45 98 48 8b 4d a8 48 8b 01 4e 8d 34 20 <49> 8b 56 08 41 0f b7 76 10 41 8b 7e 24 4a 8d 1c 22 89 7d b0 48 01
[74438.212543] RSP: 0018:ffffc9000028be50 EFLAGS: 00010246
[74438.212543] RAX: fffffff00a6f97ff RBX: 0000000000000020 RCX: ffff8881ba9538f8
[74438.212543] RDX: 00000000000003ff RSI: ffff8881ba953900 RDI: ffff8881ba9538f8
[74438.212543] RBP: ffffc9000028bec8 R08: 0000000000000159 R09: 0000000000000020
[74438.212543] R10: ffffc90000083d68 R11: 0000000000000108 R12: ffff888000000000
[74438.212543] R13: 0000000000000001 R14: ffff88700a6f97ff R15: ffff8881b88b3200
[74438.212543] FS:  0000000000000000(0000) GS:ffff8881bbb00000(0000) knlGS:0000000000000000
[74438.212543] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[74438.212543] CR2: ffff88700a6f9807 CR3: 000000000200a005 CR4: 00000000001606e0
[74438.212543] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[74438.212543] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[74438.212543] Call Trace:
[74438.212543]  kni_net_rx+0xa/0x10 [rte_kni]
[74438.212543]  kni_thread_multiple+0x28/0x80 [rte_kni]
[74438.212543]  kthread+0xf0/0x130
[74438.212543]  ? kni_thread_single+0xb0/0xb0 [rte_kni]
[74438.212543]  ? kthread_park+0x90/0x90
[74438.212543]  ret_from_fork+0x1f/0x30
[74438.212543] Modules linked in: igb_uio(O) rte_kni(O) uio_hv_generic uio xt_connlimit nf_conncount iptable_nat ipt_MASQUERADE xt_state xt_nat xt_helper xt_conntrack xt_connmark xt_connbytes xt_REDIRECT xt_CT nf_nat_ipv4 nf_nat nf_conntrack_netlink nf_conntrack ipt_REJECT xt_time xt_tcpudp xt_tcpmss xt_statistic xt_recent xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_ecn xt_dscp xt_comment xt_TCPMSS xt_LOG xt_HL xt_DSCP xt_CLASSIFY ts_kmp ts_fsm ts_bm nfnetlink nf_reject_ipv4 nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_filter ipt_ECN ip_tables act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_tbf sch_htb sch_hfsc sch_ingress ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables hfcpci l1oip
[74438.212543]  mISDN_dsp mISDN_core autofs4 hv_vendor_detect(O)
[74438.212543] CR2: ffff88700a6f9807
[74438.212543] ---[ end trace 217e3cbf906e4b94 ]---
[74438.212543] RIP: 0010:kni_net_rx_normal+0x125/0x330 [rte_kni]
[74438.212543] Code: 00 00 00 00 80 88 ff ff 48 8d b9 b8 01 00 00 48 8d 84 c1 c0 01 00 00 48 89 7d a8 48 89 45 98 48 8b 4d a8 48 8b 01 4e 8d 34 20 <49> 8b 56 08 41 0f b7 76 10 41 8b 7e 24 4a 8d 1c 22 89 7d b0 48 01
[74438.212543] RSP: 0018:ffffc9000028be50 EFLAGS: 00010246
[74438.212543] RAX: fffffff00a6f97ff RBX: 0000000000000020 RCX: ffff8881ba9538f8
[74438.212543] RDX: 00000000000003ff RSI: ffff8881ba953900 RDI: ffff8881ba9538f8
[74438.212543] RBP: ffffc9000028bec8 R08: 0000000000000159 R09: 0000000000000020
[74438.212543] R10: ffffc90000083d68 R11: 0000000000000108 R12: ffff888000000000
[74438.212543] R13: 0000000000000001 R14: ffff88700a6f97ff R15: ffff8881b88b3200
[74438.212543] FS:  0000000000000000(0000) GS:ffff8881bbb00000(0000) knlGS:0000000000000000
[74438.212543] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[74438.212543] CR2: ffff88700a6f9807 CR3: 000000000200a005 CR4: 00000000001606e0
[74438.212543] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[74438.212543] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


-----------------------------------------------------------------------------------------------------------------------
Notice: This e-mail together with any attachments may contain information of Ribbon Communications Inc. that
is confidential and/or proprietary for the sole use of the intended recipient.  Any review, disclosure, reliance or
distribution by others or forwarding without express permission is strictly prohibited.  If you are not the intended
recipient, please notify the sender immediately and then delete all copies, including any attachments.
-----------------------------------------------------------------------------------------------------------------------