RE: [Xen-devel] Oops: 0000 [#1] SMP - Xen 3.4.1, Linux 2.6.31, Fedora 11

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

The real reason is the UHCI DMA error and maybe caused by swiotlb.

I'm not sure if following patch is in your code or not.

http://article.gmane.org/gmane.comp.emulators.xen.devel/71324

--jyh

xen-devel-bounces@xxxxxxxxxxxxxxxxxxx wrote:
> Running Xen 3.4.1 on Fedora 11, upgraded from 2.6.31 rc-6 to
> 2.6.31 and
> ran into:
> 
> [    1.974072] usb usb2: usb_probe_device
> [    1.974074] usb usb2: no configuration chosen from 0 choices
> [    1.974076] drivers/usb/core/inode.c: creating file '001'
> [    1.974096] uhci_hcd 0000:00:1d.0: HC died; cleaning up
> [    1.974105] BUG: unable to handle kernel NULL pointer
> dereference at
> 0000000000000098
> [    1.974108] IP: [<ffffffff812e2327>] usb_kick_khubd+0xb/0x20 [   
> 1.974117] PGD 0 [    1.974119] Oops: 0000 [#1] SMP
> [    1.974121] last sysfs file:
> [    1.974124] CPU 0
> [    1.974126] Modules linked in:
> [    1.974129] Pid: 665, comm: work_for_cpu Not tainted 2.6.31 #1
> X7DW3 [    1.974131] RIP: e030:[<ffffffff812e2327>] 
> [<ffffffff812e2327>] usb_kick_khubd+0xb/0x20 [    1.974136] RSP:
> e02b:ffff8803e81f7de0  EFLAGS: 00010046 [    1.974138] RAX:
> 0000000000000000 RBX: ffff8803e85dcc00 RCX: 000000000000024f [   
> 1.974140] RDX: ffffffff818edf6c RSI: 0000000000000023 RDI:
> ffff8803e85c6000 [    1.974143] RBP: ffff8803e81f7de0 R08:
> 0000000000000002 R09: 0000000000000000 [    1.974145] R10:
> 0000000000000005 R11: 0000000000000000 R12: 0000000000000241 [   
> 1.974147] R13: ffff8803e85c6000 R14: ffff8803e85c6000 R15:
> 0000000000000014 [    1.974153] FS:  0000000000000000(0000)
> GS:ffffc90000000000(0000) knlGS:0000000000000000 [    1.974155] CS: 
> e033 DS: 0000 ES: 0000 CR0: 000000008005003b [    1.974157] CR2:
> 0000000000000098 CR3: 0000000001001000 CR4: 0000000000002660 [   
> 1.974160] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000 [    1.974163] DR3: 0000000000000000 DR6:
> 00000000ffff0ff0 DR7: 0000000000000400 [    1.974166] Process
> work_for_cpu (pid: 665, threadinfo ffff8803e81f6000, task
> ffff8803ea29f100) [    1.974167] Stack: [    1.974171] 
> ffff8803e81f7e00 ffffffff812e7581 ffff8803e85dcc00 0000000000000000 [
> 1.974174] <0> ffff8803e81f7e60 ffffffff812e851b ffff8803e81f7e40
> 0000000000001800 [    1.974178] <0> ffffffff8164876b ffff8803e9806880
> ffff8803e85dcc00 ffff8803e9806800 [    1.974182] Call Trace: [   
> 1.974187]  [<ffffffff812e7581>] usb_hc_died+0x60/0x74 [    1.974191] 
> [<ffffffff812e851b>] usb_add_hcd+0x546/0x60c [    1.974195] 
> [<ffffffff812f4c31>] usb_hcd_pci_probe+0x252/0x305 [    1.974201] 
> [<ffffffff81055976>] ? do_work_for_cpu+0x0/0x25 [    1.974206] 
> [<ffffffff811b9117>] local_pci_probe+0x12/0x16 [    1.974209] 
> [<ffffffff81055989>] do_work_for_cpu+0x13/0x25 [    1.974213] 
> [<ffffffff8105926d>] kthread+0x8c/0x94 [    1.974217] 
> [<ffffffff81013b0a>] child_rip+0xa/0x20 [    1.974221] 
> [<ffffffff81012ce7>] ? int_ret_from_sys_call+0x7/0x1b [    1.974225] 
> [<ffffffff8101349d>] ? retint_restore_args+0x5/0x6 [    1.974228] 
> [<ffffffff81013b00>] ? child_rip+0x0/0x20 [    1.974229] Code: 48 c7
> c7 90 13 71 81 e8 ba 60 d5 ff 48 89   
> de 48 c7 c7
> 68 df 8e 81 e8 d0 71 1a 00 5b 41 5c c9 c3 55 48 8b 87 08 02 00 00 48
> 89 e5 <48> 8b 80 98 00 00 00 48 8b b8 b8 00 00 00 e8 57 ff ff ff c9 c3
> [    1.974261] RIP  [<ffffffff812e2327>] usb_kick_khubd+0xb/0x20
> [    1.974265]  RSP <ffff8803e81f7de0>
> [    1.974266] CR2: 0000000000000098
> [    1.974274] ---[ end trace 3c92d0fd04a9e00f ]---
> [    1.974279] work_for_cpu used greatest stack depth: 4936 bytes left
> [    2.284320] scsi 2:0:0:0: Direct-Access     ATA      WDC
> WD1600BEVS-2 
> 11.0 PQ: 0 ANSI: 5
> [    2.292878] sd 2:0:0:0: Attached scsi generic sg0 type 0
> [    2.298351] sd 2:0:0:0: [sda] 312581808 512-byte logical
> blocks: (160
> GB/149 GiB)
> [    2.305918] sd 2:0:0:0: [sda] Write Protect is off
> [    2.306836] sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
> [    2.315812] sd 2:0:0:0: [sda] Write cache: enabled, read cache:
> enabled, doesn't support DPO or FUA
> [    2.325041]  sda:
> 
> 
>> <>
> Nathan Stratton                                CTO, BlinkMind, Inc.
> nathan at robotics.net                         nathan at blinkmind.com
> http://www.robotics.net                       
> http://www.blinkmind.com 
> 
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