Re: rmmod mlx4_core panic 3.16-rc1

Or Gerlitz
2014-06-20T03:34:48Z

On Thu, Jun 19, 2014 at 6:33 AM, Shirley Ma <shirley.ma-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> wrote:
>
> 1. Whether IB VFs is supported in ConnectX-2 (mlx4 driver)?
>
> I tried to num_vfs={port1,port2,port1+2} when loading mlx4_core module, it failed with 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

What do you mean by "port1" and "port2" -- can you give the exact
command line you used?

Single ported VFs are currently supported for Ethernet only
configuration, that is not for only IB nor for VPI, that is only if
you use port_type_arrary=2,2

>
>
> 2. After mlx4_core module is being loaded with with num_vfs={} parameters, when removing mlx4_core, it consistently hits below panic. Whether this problem is being tracked?

what do you mean by "num_vfs={}", is it num_vfs=N or {N}, also here,
please send the exact setting you used. The crash you indicated below
is supposed to be fixed by the upstream commit
da1de8dfff09d33d4a5345762c21b487028e25f5 "net/mlx4_core: Keep only one
driver entry release" - are you sure to have this commit in the tree
you are working with?

Or.

>
> <mlx4_ib> mlx4_ib_add: mlx4_ib: Mellanox ConnectX InfiniBand driver v2.2-1 (Feb 2014)
> mlx4_core: Mellanox ConnectX core driver v2.2-1 (Feb, 2014)
> mlx4_core: Initializing 0000:40:00.0
> mlx4_core 0000:40:00.0: Enabling SR-IOV with 2 VFs
> pci 0000:40:00.1: [15b3:1002] type 00 class 0x0c0600
> mlx4_core: Initializing 0000:40:00.1
> mlx4_core 0000:40:00.1: enabling device (0000 -> 0002)
> mlx4_core 0000:40:00.1: Skipping virtual function:1
> pci 0000:40:00.2: [15b3:1002] type 00 class 0x0c0600
> mlx4_core: Initializing 0000:40:00.2
> mlx4_core 0000:40:00.2: enabling device (0000 -> 0002)
> mlx4_core 0000:40:00.2: Skipping virtual function:2
> mlx4_core 0000:40:00.0: Running in master mode
> mlx4_core 0000:40:00.0: PCIe BW is different than device's capability
> mlx4_core 0000:40:00.0: PCIe link speed is 5.0GT/s, device supports 8.0GT/s
> mlx4_core 0000:40:00.0: PCIe link width is x8, device supports x8
> 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]
> 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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