Re: [Xen-devel] BUG: unable to handle kernel paging request

[Samuel Monderer <SMonderer@xxxxxxxxxxxxxxx>]

Hi Konrad,

I've encountered that problem when I passed the interface to the guest.
Upgrading the kernel solved the problem.
But know I try to run pass the interface to the igb_uio driver (intel DPDK 
driver) and I get the crash.

Regards,
Samuel
________________________________________
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Sent: Friday, April 11, 2014 8:10 PM
To: Samuel Monderer
Cc: xen-devel@xxxxxxxxxxxxx
Subject: Re: [Xen-devel] BUG: unable to handle kernel paging request

On Thu, Apr 10, 2014 at 06:21:52AM +0000, Samuel Monderer wrote:
> Hi,
>
> When trying to bind VF to igb_uio on a PV machine I get the following error 
> the module crashes
>       BUG: unable to handle kernel paging request Xen dmesg shows mm.c:618:d1 
> Could not get page ref for pfn df300 I'm new to dpdk so if you need any other 
> information let me know.
>
> Regards,
> Samuel
>
> Environment:
>       Dom0:
>               root@Smart:~# uname -a
>                       Linux Smart 3.13-1-amd64 #1 SMP Debian 3.13.7-1 
> (2014-03-25) x86_64 GNU/Linux
>       DomU:
>                 root@vm1:~# uname -a
>                       Linux vm1 3.13-1-amd64 #1 SMP Debian 3.13.7-1 
> (2014-03-25) x86_64 GNU/Linux
>       Xen 4.3
>       Intel X540 Ethernet controller
>
> root@Smart:~# lspci
> 01:00.0 Ethernet controller: Intel Corporation Ethernet Controller 10-Gigabit 
> X540-AT2 (rev 01)
> 01:00.1 Ethernet controller: Intel Corporation Ethernet Controller 10-Gigabit 
> X540-AT2 (rev 01)
> 02:10.0 Ethernet controller: Intel Corporation X540 Ethernet Controller 
> Virtual Function (rev 01)
> 02:10.1 Ethernet controller: Intel Corporation X540 Ethernet Controller 
> Virtual Function (rev 01)
> 04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. 
> RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06) 
> root@Smart:~#
>
> root@vm1:~# ./dpdk-1.6.0r1/tools/pci_unbind.py --status
>
> Network devices using IGB_UIO driver
> ====================================
> <none>
>
> Network devices using kernel driver
> ===================================
> 0000:00:00.0 'X540 Ethernet Controller Virtual Function' if=eth1 drv=ixgbevf 
> unused=igb_uio
>
> Other network devices
> =====================
> <none>
> root@vm1:~# ./dpdk-1.6.0r1/tools/pci_unbind.py -b igb_uio 00:00.0
> [   90.348487] xen:events: xen_bind_pirq_gsi_to_irq: returning irq 47 for gsi > 0
> [   90.348496] igb_uio 0000:00:00.0: Xen PCI mapped GSI0 to IRQ47
> [   90.348791] BUG: unable to handle kernel paging request at ffffc9000063e00c
> [   90.348796] IP: [<ffffffffa01542cf>] 
> igbuio_set_interrupt_mask.isra.2+0xbf/0xe0 [igb_uio]
> [   90.348802] PGD 98440067 PUD 98441067 PMD 97e47067 PTE 8010000000000464
> [   90.348807] Oops: 0003 [#1] SMP
> [   90.348810] Modules linked in: igb_uio(O) uio ixgbevf xen_pcifront 
> x86_pkg_temp_thermal thermal_sys coretemp crct10dif_pclmul crct10dif_common 
> crc32_pclmul crc32c_intel ghash_clmulni_intel evdev aesni_intel aes_x86_64 
> lrw gf128mul glue_helper ablk_helper cryptd pcspkr ext4 crc16 mbcache jbd2 
> dm_mod xen_netfront xen_blkfront
> [   90.348831] CPU: 0 PID: 1378 Comm: pci_unbind.py Tainted: G           O 
> 3.13-1-amd64 #1 Debian 3.13.7-1
> [   90.348835] task: ffff880094a5a010 ti: ffff880015c1a000 task.ti: 
> ffff880015c1a000
> [   90.348838] RIP: e030:[<ffffffffa01542cf>]  [<ffffffffa01542cf>] 
> igbuio_set_interrupt_mask.isra.2+0xbf/0xe0 [igb_uio]
> [   90.348843] RSP: e02b:ffff880015c1bd78  EFLAGS: 00010086
> [   90.348845] RAX: ffff8800158f1480 RBX: 0000000000000000 RCX: 
> 0000000000000001
> [   90.348848] RDX: ffff8800158f1498 RSI: ffffc9000063e00c RDI: 
> ffff880094ec1868
> [   90.348850] RBP: ffff880094ec1000 R08: 0000000000000001 R09: 
> 0000000000000000
> [   90.348853] R10: 0000000000000030 R11: 0000000000000044 R12: 
> ffff880094ec1000
> [   90.348855] R13: 0000000000000200 R14: 0000000000000000 R15: 
> 0000000000000002
> [   90.348860] FS:  00007f0dfabfd700(0000) GS:ffff88009f800000(0000) 
> knlGS:0000000000000000
> [   90.348863] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   90.348865] CR2: ffffc9000063e00c CR3: 0000000094812000 CR4: 
> 0000000000042660
> [   90.348868] Stack:
> [   90.348870]  ffffffff8129861c ffff880015cc9000 ffff880015cc9218 
> ffffffffa0154418
> [   90.348874]  ffff880094ec1098 ffff880094ec10a8 ffff880015cc9000 
> ffff880094ec1000
> [   90.348878]  0000000000000000 ffffffffa015470c 0000000000004000 
> 0000000000000200
> [   90.348882] Call Trace:
> [   90.348888]  [<ffffffff8129861c>] ? pci_cfg_access_trylock+0x3c/0x50
> [   90.348892]  [<ffffffffa0154418>] ? igbuio_pci_irqcontrol+0x48/0x90 
> [igb_uio]
> [   90.348895]  [<ffffffffa015470c>] ? igbuio_pci_probe+0x2ac/0x450 [igb_uio]
> [   90.348899]  [<ffffffff812a108a>] ? local_pci_probe+0x3a/0xa0
> [   90.348903]  [<ffffffff812a239a>] ? pci_device_probe+0xca/0x120
> [   90.348908]  [<ffffffff81355058>] ? driver_probe_device+0x68/0x220
> [   90.348911]  [<ffffffff81353b4b>] ? bind_store+0xcb/0x110
> [   90.348916]  [<ffffffff811e74a6>] ? sysfs_write_file+0x126/0x1c0
> [   90.348921]  [<ffffffff8117957a>] ? vfs_write+0xaa/0x1e0
> [   90.348924]  [<ffffffff81179f83>] ? SyS_write+0x43/0xa0
> [   90.348929]  [<ffffffff814a71c8>] ? page_fault+0x28/0x30
> [   90.348933]  [<ffffffff814ae4f9>] ? system_call_fastpath+0x16/0x1b
> [   90.348935] Code: 0f b7 48 02 89 f1 41 89 f0 83 e1 fe 41 83 c8 01 85 db 41 
> 0f 44 c8 39 ce 74 1c 41 0f b7 f1 c1 e6 04 83 c6 0c 48 63 f6 48 03 70 28 <89> 
> 0e 48 8b 50 28 8b 12 89 48 08 48 8b 48 18 48 39 cf 48 8d 41
> [   90.348964] RIP  [<ffffffffa01542cf>] 
> igbuio_set_interrupt_mask.isra.2+0xbf/0xe0 [igb_uio]


That could be:
https://bugzilla.kernel.org/show_bug.cgi?id=64581

which is that you need these two:

commit ac8344c4c0bf74c7efaf962cf2a6404331678ce4
Author: DuanZhenzhong <zhenzhong.duan@xxxxxxxxxx>
Date:   Wed Dec 4 13:09:16 2013 +0800

    PCI: Drop "irq" param from *_restore_msi_irqs()
commit 0e4ccb1505a9e29c50170742ce26ac4655baab2d
Author: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date:   Wed Nov 6 16:16:56 2013 -0500

    PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()


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