[dpdk-dev] [4.4 kernel] kni lockup, kernel dump

[ALeX Wang]

Hi,

I recently upgraded my debian/jessie to 4.4 kernel, and my application uses
kni to
create test interface,

However, when doing 'rte_kni_alloc()', i observed the following log in
syslog...
If i go on trying setting interface via ifconfig, the execution locks up...

[  888.051427] BUG: unable to handle kernel paging request at
0000073b010bcb88
[  888.051972] IP: [<ffffffffa051a59a>] kni_net_rx_normal+0x3a/0x290
[rte_kni]
[  888.052371] PGD 0
[  888.052638] Oops: 0000 [#1] SMP
[  888.053041] Modules linked in: rte_kni(O) xt_conntrack ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4
nf_nat_ipv4 xt_addrtype iptable_filter ip_tables x_tables nf_nat
nf_conntrack br_netfilter bridge stp llc dm_thin_pool dm_persistent_data
dm_bio_prison dm_bufio libcrc32c crc32c_generic loop dm_mod nfsd
auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc
crct10dif_pclmul crc32_pclmul jitterentropy_rng sha256_ssse3 sha256_generic
hmac drbg ansi_cprng ppdev parport_pc i2c_piix4 aesni_intel aes_x86_64
parport acpi_cpufreq tpm_tis tpm lrw gf128mul glue_helper ablk_helper evdev
cryptd 8250_fintek psmouse processor serio_raw video battery button ac
pcspkr autofs4 ext4 crc16 mbcache jbd2 sg sd_mod ata_generic ahci
crc32c_intel libahci ata_piix fjes libata
[  888.065118]  e1000 scsi_mod
[  888.065476] CPU: 1 PID: 2226 Comm: kni_single Tainted: G           O
 4.4.0-0.bpo.1-amd64 #1 Debian 4.4.6-1~bpo8+1
[  888.065861] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS
VirtualBox 12/01/2006
[  888.066183] task: ffff88011ab9e0c0 ti: ffff8800b2fb8000 task.ti:
ffff8800b2fb8000
[  888.066666] RIP: 0010:[<ffffffffa051a59a>]  [<ffffffffa051a59a>]
kni_net_rx_normal+0x3a/0x290 [rte_kni]
[  888.094268] RSP: 0018:ffff8800b2fbbd40  EFLAGS: 00010246
[  888.094879] RAX: ffff8800da073000 RBX: ffff8800d88bc2f8 RCX:
0000000000000000
[  888.095392] RDX: 0000073b010bcb80 RSI: 0000000000000282 RDI:
ffff8800da073840
[  888.095929] RBP: 00000000000003e8 R08: ffff8800b2fb8000 R09:
000000cec3fd1e2c
[  888.096425] R10: 0000000000000002 R11: 0000000000000000 R12:
ffff8800d88bc2c0
[  888.096913] R13: ffff8800d88bc2d0 R14: ffff8800da073840 R15:
ffff8800da073840
[  888.097382] FS:  0000000000000000(0000) GS:ffff88011fc80000(0000)
knlGS:0000000000000000
[  888.098052] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  888.098490] CR2: 0000073b010bcb88 CR3: 0000000000044000 CR4:
00000000000406e0
[  888.098958] Stack:
[  888.099294]  ffff8800b2fb8000 ffff88011fc95d80 ffff88011ab9e0c0
0000000000000000
[  888.100428]  ffffffff810bc311 0000000000000000 0000000000000002
000000cec3fd1e2c
[  888.101629]  ffff8800b2fb8000 ffff88011fc8df80 0000000000000282
0000000000000001
[  888.103134] Call Trace:
[  888.103607]  [<ffffffff810bc311>] ?
__raw_callee_save___pv_queued_spin_unlock+0x11/0x20
[  888.104553]  [<ffffffff810dc2c9>] ? try_to_del_timer_sync+0x59/0x80
[  888.105290]  [<ffffffff810dc334>] ? del_timer_sync+0x44/0x50
[  888.105722]  [<ffffffff81591839>] ? schedule_timeout+0x169/0x2d0
[  888.106159]  [<ffffffff810dbdd0>] ?
trace_event_raw_event_tick_stop+0x100/0x100
[  888.106816]  [<ffffffffa051a05c>] ? kni_thread_single+0x4c/0xa0 [rte_kni]
[  888.107279]  [<ffffffffa051a010>] ? kni_init_net+0x50/0x50 [rte_kni]
[  888.107754]  [<ffffffff81095baf>] ? kthread+0xdf/0x100
[  888.108177]  [<ffffffff81095ad0>] ? kthread_park+0x50/0x50
[  888.108600]  [<ffffffff81592adf>] ? ret_from_fork+0x3f/0x70
[  888.109026]  [<ffffffff81095ad0>] ? kthread_park+0x50/0x50
[  888.109448] Code: 54 55 53 48 81 ec 28 01 00 00 48 8b 97 78 01 00 00 65
48 8b 04 25 28 00 00 00 48 89 84 24 20 01 00 00 31 c0 48 8b 87 48 01 00 00
<44> 8b 72 08 48 89 04 24 8b 42 04 8b 0a 41 83 ee 01 83 e8 01 29
[  888.145305] RIP  [<ffffffffa051a59a>] kni_net_rx_normal+0x3a/0x290
[rte_kni]
[  888.145904]  RSP <ffff8800b2fbbd40>
[  888.146337] CR2: 0000073b010bcb88
[  888.146705] ---[ end trace ef3848430517129b ]---

-- 
Alex Wang,