[Xen-devel] ixgbevf BUG in linux HVM guests

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Even if we get passed the other boot issue of Linux HVM kernels
(http://marc.info/?l=xen-devel&m=129847075105008&w=2) with a ixgbe VF
assigned, after I execute dhclient in the guest I get this BUG:

[360532.648389] ADDRCONF(NETDEV_UP): eth0_rename: link is not ready
[360532.656897] BUG: unable to handle kernel 
[360532.656926] ADDRCONF(NETDEV_CHANGE): eth0_rename: link becomes ready
[360532.672055] paging request at 0000001ffff1001a
[360532.678918] IP: [<ffffffff814a44d6>] ixgbevf_msix_clean_tx+0xc6/0x430
[360532.688288] PGD 1caf9067 PUD 0 
[360532.693172] Oops: 0000 [#1] SMP 
[360532.698286] last sysfs file: /sys/devices/virtual/net/lo/operstate
[360532.706972] CPU 0 
[360532.709726] Modules linked in:
[360532.714731] 
[360532.717149] Pid: 0, comm: swapper Not tainted 2.6.38-rc6+ #1258 Xen HVM domU
[360532.727555] RIP: 0010:[<ffffffff814a44d6>]  [<ffffffff814a44d6>] 
ixgbevf_msix_clean_tx+0xc6/0x430
[360532.740031] RSP: 0018:ffff88001f403e28  EFLAGS: 00010006
[360532.747487] RAX: 0000001ffff10000 RBX: 00000000ffff8800 RCX: 
ffff88001d1d0ac8
[360532.757438] RDX: 0000000000000000 RSI: ffff88001d1d0740 RDI: 
ffff88001e1f7768
[360532.767325] RBP: ffff88001f403ea8 R08: 0000000000000000 R09: 
0000000000000000
[360532.777259] R10: 0000000000000000 R11: 0000000000000001 R12: 
00000000ffff8800
[360532.787153] R13: ffff88001d616570 R14: ffff88001e1f0078 R15: 
0000000000000000
[360532.797132] FS:  0000000000000000(0000) GS:ffff88001f400000(0000) 
knlGS:0000000000000000
[360532.808364] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[360532.816445] CR2: 0000001ffff1001a CR3: 000000001cafc000 CR4: 
00000000000006f0
[360532.826345] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
0000000000000000
[360532.836310] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 
0000000000000400
[360532.846242] Process swapper (pid: 0, threadinfo ffffffff82000000, task 
ffffffff8200b020)
[360532.857478] Stack:
[360532.860463]  ffffffff82001fd8 0000000000000001 ffffffff822a9880 
ffff88001e1f7768
[360532.871506]  ffff88001e1f7700 ffff88001d1d0740 0000000000000000 
0000000000000046
[360532.882569]  ffff88001f403ec8 ffff88001d1d0000 ffff88001d1d0ac8 
ffff88001d616500
[360532.893602] Call Trace:
[360532.897266]  <IRQ> 
[360532.900567]  [<ffffffff810bb954>] handle_IRQ_event+0x74/0x170
[360532.908642]  [<ffffffff810be44d>] handle_level_irq+0x9d/0x140
[360532.916717]  [<ffffffff81388016>] __xen_evtchn_do_upcall+0x1c6/0x1f0
[360532.925553]  [<ffffffff813889ef>] xen_evtchn_do_upcall+0x2f/0x50
[360532.933884]  [<ffffffff8100d0c3>] xen_hvm_callback_vector+0x13/0x20
[360532.942642]  <EOI> 
[360532.945999]  [<ffffffff81007b60>] ? xen_clocksource_read+0x20/0x30
[360532.954560]  [<ffffffff81034e3b>] ? native_safe_halt+0xb/0x10
[360532.962647]  [<ffffffff81015135>] default_idle+0xa5/0x190
[360532.970224]  [<ffffffff8100b16f>] cpu_idle+0xbf/0x120
[360532.977532]  [<ffffffff81951bdd>] rest_init+0x6d/0x80
[360532.985093]  [<ffffffff82177e85>] start_kernel+0x416/0x4df
[360532.993383]  [<ffffffff821772c5>] x86_64_start_reservations+0xa5/0xc9
[360533.003081]  [<ffffffff821773fd>] x86_64_start_kernel+0x114/0x12f
[360533.012240]  [<ffffffff82177140>] ? early_idt_handler+0x0/0x71


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