[dpdk-users] [18.11] KNI exception

Giridharan, Ganesan ggiridharan at rbbn.com
Wed Jun 19 14:40:43 CEST 2019


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


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