Re: rmmod mlx4_core panic 3.16-rc1

Wei Yang
2014-06-20T06:21:14Z

On Fri, Jun 20, 2014 at 07:02:41AM +0300, Or Gerlitz wrote:
>On Fri, Jun 20, 2014 at 6:51 AM, Wei Yang <weiyang-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> wrote:
>
>> >> mlx4_core 0000:40:00.0: Invalid syntax of num_vfs/probe_vfs with IB port - single port VFs syntax is only supported when all ports are configured as ethernet
>> >> BUG: unable to handle kernel NULL pointer dereference at 000000000000038c
>> >> IP: [<ffffffffa0350450>] __mlx4_remove_one+0x20/0x380 [mlx4_core]
>>
>> From this log, it happens during probe?
>> If not, any action after probe?
>
>yep, maybe the bug still exists in the error flow of probe? you can probe with
>
>num_vfs=1,1,1 port_type_array=1,1 and see if you hit it
>

I tried this

modprobe mlx4_core num_vfs=3 probe_vf=3 port_type_array=1,1

It looks good to me.

BTW, I didn't test 3.16-rc1, sine the SRIOV patch on power platform is not
rebased to the latest kernel yet.

>
>>
>> >> PGD 45d3ba067 PUD 45ace8067 PMD 0
>> >> Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
>> >> Modules linked in: mlx4_core(-) ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat xt_CHECKSUM iptable_mangle bridge stp llc autofs4 cpufreq_ondemand ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables dm_mirror dm_region_hash dm_log dm_mod vhost_net macvtap macvlan vhost tun kvm_intel kvm iTCO_wdt iTCO_vendor_support microcode ipmi_si ipmi_msghandler acpi_cpufreq pcspkr i2c_i801 i2c_core lpc_ich mfd_core shpchp sg ioatdma ib_sa ib_mad ib_core ib_addr ipv6 vxlan ixgbe dca ptp pps_core hwmon mdio ext3 jbd mbcache sd_mod crc_t10dif crct10dif_common usb_storage ahci libahci mpt2sas scsi_transport_sas raid_class [last unloaded: mlx4_core]
>> >> CPU: 13 PID: 7212 Comm: rmmod Not tainted 3.16.0-rc1+ #1
>> >> Hardware name: Oracle Corporation SUN FIRE X4170 M3 /ASSY,MOTHERBOARD,1U , BIOS 17050100 08/29/2013
>> >> task: ffff880461540110 ti: ffff880465000000 task.ti: ffff880465000000
>> >> RIP: 0010:[<ffffffffa0350450>] [<ffffffffa0350450>] __mlx4_remove_one+0x20/0x380 [mlx4_core]
>> >> RSP: 0018:ffff880465003d88 EFLAGS: 00010296
>> >> RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
>> >> RDX: 0000000000000026 RSI: 0000000000000292 RDI: ffff880468b8f000
>> >> RBP: ffff880465003db8 R08: 0000000000000000 R09: 0000000000000000
>> >> R10: 09f911029d74e35b R11: 09f911029d74e35b R12: 0000000000000000
>> >> R13: ffff880468b8f000 R14: ffffffffa036de40 R15: 0000000000000001
>> >> FS: 00007ff287fc2700(0000) GS:ffff88046fce0000(0000) knlGS:0000000000000000
>> >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> >> CR2: 000000000000038c CR3: 000000045cfae000 CR4: 00000000000407e0
>> >> Stack:
>> >> ffff880465003da8 ffff880468b8f000 0000000000000000 ffff880468b8f000
>> >> ffffffffa036de40 0000000000000001 ffff880465003dd8 ffffffffa0350805
>> >> ffff880468b8f098 ffffffffa036dd60 ffff880465003e08 ffffffff812ebaa6
>> >> Call Trace:
>> >> [<ffffffffa0350805>] mlx4_remove_one+0x25/0x50 [mlx4_core]
>> >> [<ffffffff812ebaa6>] pci_device_remove+0x46/0xc0
>> >> [<ffffffff813ce08f>] __device_release_driver+0x7f/0xf0
>> >> [<ffffffff813ce1c8>] driver_detach+0xc8/0xd0
>> >> [<ffffffff813cced9>] bus_remove_driver+0x59/0xd0
>> >> [<ffffffff813cef80>] driver_unregister+0x30/0x70
>> >> [<ffffffff812ebc13>] pci_unregister_driver+0x23/0x80
>> >> [<ffffffffa03650e4>] mlx4_cleanup+0x10/0x1e [mlx4_core]
>> >> [<ffffffff810ceff9>] SyS_delete_module+0x189/0x210
>> >> [<ffffffff815d2f12>] system_call_fastpath+0x16/0x1b
>> >> Code: 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 08 66 66 66 66 90 48 8b 9f 58 01 00 00 49 89 fd <44> 8b b3 8c 03 00 00 45 85 f6 0f 85 41 02 00 00 f6 43 08 04 44
>> >> RIP [<ffffffffa0350450>] __mlx4_remove_one+0x20/0x380 [mlx4_core]
>> >> RSP <ffff880465003d88>
>> >> CR2: 000000000000038c
>> >> --
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>> --
>> Richard Yang
>> Help you, Help me
>>

--
Richard Yang
Help you, Help me