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xen-devel
Re: [Xen-devel] Udev or XEN bug?
On 06/20/2010 10:05 AM, Pasi Kärkkäinen wrote:
> On Sat, Jun 19, 2010 at 06:50:43PM +0200, Stephan Seitz wrote:
>
>> Hi!
>>
>> I???m usingen Debian/Testing with xen-hypervisor-4.0-amd64. Kernel for
>> Dom0 is 2.6.34 with xen-patches-2.6.34-1.tar.bz2, kernel for DomU is the
>> standard 2.6.34.
>>
>> With all udev version since 153-2, I can???t start my DomU. The following
>> oops is happening:
>>
>>
> Yeah, this is a known issue, and many people have seen it with new udev
> versions.
>
> See these emails for earlier discussion:
> http://lists.xensource.com/archives/html/xen-devel/2010-05/msg01462.html
> http://lists.xensource.com/archives/html/xen-devel/2010-05/msg01475.html
>
> Also a friend of mine (CC) wrote this RFC-patch:
> http://www.axu.tm/~ams/xen.diff.txt
>
> Jeremy: Can we get a fix committed to xen/stable-2.6.32.x (and I guess to
> xen/stable-2.6.31.x aswell) ?
>
I applied a fix from James Harper which he said fixed the problem for
him. However, Bastian said it was insufficient and posted an
alternative, but Jan had some comments on it. I held off doing anything
more until they came to a resolution (since James' initial patch seemed
to be good enough as a placeholder). But there was no further
discussion so it all stalled.
Jan, do you have a patch which implements your suggestions?
J
> Jan: Did you guys sort this out in Novell kernels already?
>
> -- Pasi
>
>
>
>> <1>1 2010-06-19T10:05:09.833919+02:00 osgiliath kernel - - - [ 966.651574]
>> BUG: unable to handle kernel NULL pointer dereference at 0000000000000110
>> <1>1 2010-06-19T10:05:09.833927+02:00 osgiliath kernel - - - [ 966.652006]
>> IP: [<ffffffff812a1818>] netback_uevent+0x74/0x98
>> <4>1 2010-06-19T10:05:09.833929+02:00 osgiliath kernel - - - [
>> 966.652006] PGD c7b8a067 PUD d1dff067 PMD 0 <0>1
>> 2010-06-19T10:05:09.833932+02:00 osgiliath kernel - - - [ 966.652006]
>> Oops: 0000 [#1] SMP <0>1 2010-06-19T10:05:09.833934+02:00 osgiliath
>> kernel - - - [ 966.652006] last sysfs file:
>> /sys/devices/xen-backend/vif-1-1/uevent
>> <4>1 2010-06-19T10:05:09.833936+02:00 osgiliath kernel - - - [
>> 966.652006] CPU 0 <4>1 2010-06-19T10:05:09.833945+02:00 osgiliath kernel
>> - - - [ 966.652006] Modules linked in: microcode nfsd exportfs nfs lockd
>> auth_rpcgss sunrpc fus
>> e lrw gf128mul it87 hwmon_vid coretemp joydev saa7134_alsa snd_pcm_oss
>> snd_mixer_oss snd_hda_codec_atihdmi tuner tea5767 tda8290 tuner_xc2028
>> xc5000 td
>> a9887 tuner_simple tuner_types mt20xx snd_hda_intel tea5761 snd_hda_codec
>> snd_pcm snd_seq_dummy saa7134 snd_seq_oss ir_common snd_seq_midi
>> v4l2_common snd_rawmidi videodev snd_seq_midi_event v4l1_compat snd_seq
>> v4l2_compat_ioctl32 videobuf_dma_sg videobuf_core 8250_pnp snd_timer
>> snd_seq_device 8250 ir
>> _core serial_core tveeprom floppy snd r8169 mii soundcore i2c_i801
>> snd_page_alloc
>> <4>1 2010-06-19T10:05:09.833948+02:00 osgiliath kernel - - - [
>> 966.652006] <4>1 2010-06-19T10:05:09.833951+02:00 osgiliath kernel - - -
>> [ 966.652006] Pid: 12051, comm: udevd Not tainted 2.6.34-Dom0 #1
>> EP45-DS3/EP45-DS3
>> <4>1 2010-06-19T10:05:09.833954+02:00 osgiliath kernel - - - [ 966.652006]
>> RIP: e030:[<ffffffff812a1818>] [<ffffffff812a1818>] netback_uevent+0x74/0x
>> 98
>> <4>1 2010-06-19T10:05:09.833956+02:00 osgiliath kernel - - - [ 966.652006]
>> RSP: e02b:ffff8800d151dda8 EFLAGS: 00010246
>> <4>1 2010-06-19T10:05:09.833959+02:00 osgiliath kernel - - - [ 966.652006]
>> RAX: ffff880001fa2b80 RBX: ffff8800dda72000 RCX: ffffffff812a1815
>> <4>1 2010-06-19T10:05:09.833961+02:00 osgiliath kernel - - - [ 966.652006]
>> RDX: ffff880001f9b000 RSI: ffff880005784b30 RDI: ffff8800c5c4e000
>> <4>1 2010-06-19T10:05:09.833964+02:00 osgiliath kernel - - - [ 966.652006]
>> RBP: ffff8800d151ddc8 R08: 0000000000000073 R09: 000000000000000a
>> <4>1 2010-06-19T10:05:09.833966+02:00 osgiliath kernel - - - [ 966.652006]
>> R10: 00000000ffffffff R11: 00000000ffffffff R12: ffff8800c5c4e000
>> <4>1 2010-06-19T10:05:09.833969+02:00 osgiliath kernel - - - [ 966.652006]
>> R13: 0000000000000000 R14: ffff8800ddbea400 R15: ffff8800c7a05000
>> <4>1 2010-06-19T10:05:09.833972+02:00 osgiliath kernel - - - [ 966.671383]
>> FS: 00007f3830cac7a0(0000) GS:ffff880001f9b000(0000) knlGS:000000000000000
>> 0
>> <4>1 2010-06-19T10:05:09.833974+02:00 osgiliath kernel - - - [ 966.672401]
>> CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
>> <4>1 2010-06-19T10:05:09.833977+02:00 osgiliath kernel - - - [ 966.673157]
>> CR2: 0000000000000110 CR3: 00000000c14cc000 CR4: 0000000000002660
>> <4>1 2010-06-19T10:05:09.833979+02:00 osgiliath kernel - - - [ 966.673157]
>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> <4>1 2010-06-19T10:05:09.833982+02:00 osgiliath kernel - - - [ 966.673157]
>> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
>> <4>1 2010-06-19T10:05:09.833984+02:00 osgiliath kernel - - - [ 966.673157]
>> Process udevd (pid: 12051, threadinfo ffff8800d151c000, task ffff8800bfc31e
>> 00)
>> <0>1 2010-06-19T10:05:09.833986+02:00 osgiliath kernel - - - [ 966.673157]
>> Stack:
>> <4>1 2010-06-19T10:05:09.833989+02:00 osgiliath kernel - - - [ 966.680349]
>> ffff8800dda72048 ffff8800c5c4e000 ffff8800dda72000 ffff8800dda72058
>> <4>1 2010-06-19T10:05:09.833992+02:00 osgiliath kernel - - - [ 966.680349]
>> <0> ffff8800d151ddf8 ffffffff812919c8 ffff880001fa39b0 ffff8800dda72048
>> <4>1 2010-06-19T10:05:09.833994+02:00 osgiliath kernel - - - [ 966.680349]
>> <0> ffff8800c5c4e000 ffff8800dfc06060 ffff8800d151de28 ffffffff81280939
>> <0>1 2010-06-19T10:05:09.833996+02:00 osgiliath kernel - - - [ 966.680349]
>> Call Trace:
>> <4>1 2010-06-19T10:05:09.833999+02:00 osgiliath kernel - - - [ 966.680349]
>> [<ffffffff812919c8>] xenbus_uevent_backend+0x86/0x99
>> <4>1 2010-06-19T10:05:09.834002+02:00 osgiliath kernel - - - [ 966.680349]
>> [<ffffffff81280939>] dev_uevent+0x102/0x146
>> <4>1 2010-06-19T10:05:09.834004+02:00 osgiliath kernel - - - [ 966.680349]
>> [<ffffffff81280a82>] show_uevent+0x8c/0xe1
>> <4>1 2010-06-19T10:05:09.834007+02:00 osgiliath kernel - - - [ 966.680349]
>> [<ffffffff812805fb>] dev_attr_show+0x22/0x49
>> <4>1 2010-06-19T10:05:09.834010+02:00 osgiliath kernel - - - [ 966.680349]
>> [<ffffffff81074924>] ? __get_free_pages+0x12/0x49
>> <4>1 2010-06-19T10:05:09.834013+02:00 osgiliath kernel - - - [ 966.680349]
>> [<ffffffff810ef4a7>] sysfs_read_file+0xac/0x12e
>> <4>1 2010-06-19T10:05:09.834015+02:00 osgiliath kernel - - - [ 966.680349]
>> [<ffffffff810a2178>] vfs_read+0xaa/0x14b
>> <4>1 2010-06-19T10:05:09.834018+02:00 osgiliath kernel - - - [ 966.680349]
>> [<ffffffff810a22d2>] sys_read+0x45/0x6c
>> <4>1 2010-06-19T10:05:09.834020+02:00 osgiliath kernel - - - [ 966.680349]
>> [<ffffffff81004278>] system_call_fastpath+0x16/0x1b
>> <4>1 2010-06-19T10:05:09.834023+02:00 osgiliath kernel - - - [ 966.701922]
>> [<ffffffff81004210>] ? system_call+0x0/0x52
>> <0>1 2010-06-19T10:05:09.834027+02:00 osgiliath kernel - - - [ 966.704097]
>> Code: 48 89 df 31 c0 e8 4d cf fe ff eb 37 48 89 c2 48 c7 c6 52 f7 52 81 4c
>> 89 e7 31 c0 e8 5b 39 ed ff 4c 89 f7 e8 81 b7 df ff 4c 89 e7 <49> 8b 95 10 01
>> 00 00 48 c7 c6 5c f7 52 81 31 c0 45 31 e4 e8 38
>> <1>1 2010-06-19T10:05:09.834030+02:00 osgiliath kernel - - - [ 966.706254]
>> RIP [<ffffffff812a1818>] netback_uevent+0x74/0x98
>> <4>1 2010-06-19T10:05:09.834032+02:00 osgiliath kernel - - - [ 966.706254]
>> RSP <ffff8800d151dda8>
>> <0>1 2010-06-19T10:05:09.834034+02:00 osgiliath kernel - - - [ 966.706254]
>> CR2: 0000000000000110
>> <4>1 2010-06-19T10:05:09.834037+02:00 osgiliath kernel - - - [ 966.706386]
>> ---[ end trace cdf4f473842f756c ]---
>>
>> Going back to 153-2 resolves the problem. Is this a bug in udev or in
>> XEN?
>>
>> Shade and sweet water!
>>
>> Stephan
>>
>> --
>> | Stephan Seitz E-Mail: stse@xxxxxxxxxxxxxxxxxxx |
>> | PGP Public Keys: http://fsing.rootsland.net/~stse/pgp.html |
>>
>
>
>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel
>>
>
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