Re: [Xen-devel] 2.6.37-rc1 mainline domU - BUG: unable to handle kernel paging request

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Hmm i'm just running domU's with 2.6.37-rc1 and pci passthrough from today.
Will see how (un)stable it is.

Stacktrace seems slightly related to the one trying to start a domU on a 
2.6.37-rc1 dom0 
(http://lists.xensource.com/archives/html/xen-devel/2010-11/msg00154.html)

--
Sander

Wednesday, November 10, 2010, 11:15:25 PM, you wrote:

> This is a mainline 2.6.37-rc1 pvops domU on top of a xen-unstable build
> 22241 and xen/stable-2.6.32.x 2.6.32.24 pvops dom0.

> The domU console output hung up prior to spitting out a prompt post root
> login. I logged into the domU via ssh and ran an 'ls' of an NFS mounted dir
> and
> this immediately came out on the domU console:

> [  480.467525] BUG: unable to handle kernel paging request at
> ffff880077e9f030
> [  480.467547] IP: [<ffffffff810355f3>] ptep_set_access_flags+0x27/0x4d
> [  480.467564] PGD 1a04067 PUD 3dd7067 PMD 3f97067 PTE 8010000077e9f065
> [  480.467587] Oops: 0003 [#1] SMP
> [  480.467601] last sysfs file: /sys/kernel/uevent_seqnum
> [  480.467611] CPU 3
> [  480.467616] Modules linked in: ext4 mbcache jbd2 crc16 xen_fbfront
> fb_sys_fops sysimgblt sysfillrect syscopyarea xen_kbdfront xen_netfront
> xen_blkfront
> [  480.467676]
> [  480.467684] Pid: 3957, comm: zsh Not tainted
> 2.6.37-rc1-kernel.org-domu-6.0.bedge-debug #1 /
> [  480.467695] RIP: e030:[<ffffffff810355f3>]  [<ffffffff810355f3>]
> ptep_set_access_flags+0x27/0x4d
> [  480.467710] RSP: e02b:ffff880077ebfbd8  EFLAGS: 00010202
> [  480.467719] RAX: 800000004d686167 RBX: ffff8800763ddb80 RCX:
> 800000004d686167
> [  480.467729] RDX: ffff880077e9f030 RSI: 00007f5cb26069d0 RDI:
> ffff8800763ddb80
> [  480.467739] RBP: ffff880077ebfc08 R08: 0000000000000001 R09:
> ffffea0001a3b2d8
> [  480.467748] R10: 0000000000000100 R11: 0000000000000000 R12:
> 00007f5cb26069d0
> [  480.467759] R13: 0000000000000001 R14: 0000000000000000 R15:
> ffff8800763ddb80
> [  480.467772] FS:  00007f5cb2606700(0000) GS:ffff88007ff94000(0000)
> knlGS:0000000000000000
> [  480.467783] CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
> [  480.467792] CR2: ffff880077e9f030 CR3: 0000000077dbc000 CR4:
> 0000000000002660
> [  480.467802] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [  480.467812] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> [  480.467822] Process zsh (pid: 3957, threadinfo ffff880077ebe000, task
> ffff880078b80000)
> [  480.467832] Stack:
> [  480.467838]  0000000000000100 ffffea0001a3b2d8 7000000000000000
> 0000000000000000
> [  480.467862]  ffff880077e9f030 ffffea0001a3b2d8 ffff880077ebfca8
> ffffffff810e2200
> [  480.467886]  ffff880077ebfc38 ffffffff81007c09 ffffea0001a3b2d8
> 0000000000000001
> [  480.467910] Call Trace:
> [  480.467921]  [<ffffffff810e2200>] do_wp_page+0x2d8/0x6be
> [  480.467934]  [<ffffffff81007c09>] ? __spin_time_accum+0x21/0x37
> [  480.467946]  [<ffffffff81007e85>] ? __xen_spin_lock+0xb7/0xcd
> [  480.467958]  [<ffffffff810e2e60>] handle_mm_fault+0x87a/0x8c1
> [  480.467972]  [<ffffffff814463fe>] do_page_fault+0x374/0x396
> [  480.467984]  [<ffffffff81006c3d>] ? xen_force_evtchn_callback+0xd/0xf
> [  480.467996]  [<ffffffff81006c3d>] ? xen_force_evtchn_callback+0xd/0xf
> [  480.468009]  [<ffffffff810072a2>] ? check_events+0x12/0x20
> [  480.468020]  [<ffffffff8100728f>] ? xen_restore_fl_direct_end+0x0/0x1
> [  480.468034]  [<ffffffff810a6fa4>] ? __call_rcu+0x123/0x12c
> [  480.468045]  [<ffffffff81006c3d>] ? xen_force_evtchn_callback+0xd/0xf
> [  480.468059]  [<ffffffff810072a2>] ? check_events+0x12/0x20
> [  480.468072]  [<ffffffff81443615>] page_fault+0x25/0x30
> [  480.468085]  [<ffffffff81206add>] ? __put_user_4+0x1d/0x30
> [  480.468096]  [<ffffffff810498a6>] ? schedule_tail+0x5c/0x60
> [  480.468108]  [<ffffffff8100a9c3>] ret_from_fork+0x13/0x80
> [  480.468116] Code: 41 5d c9 c3 55 48 89 e5 41 55 45 31 ed 41 54 49 89 f4
> 53 48 89 fb 48 83 ec 18 48 39 0a 41 0f 95 c5 45 85 c0 74 1d 45 85 ed 74 18
> <48> 89 0a 48 8b 3f 0f 1f 80 00 00 00 00 4c 89 e6 48 89 df e8 b2
> [  480.468323] RIP  [<ffffffff810355f3>] ptep_set_access_flags+0x27/0x4d
> [  480.468323]  RSP <ffff880077ebfbd8>
> [  480.468323] CR2: ffff880077e9f030
> [  480.468323] ---[ end trace 6d1623321ecd50ac ]---

> The domU config is attached as config.2.6.37_domU_debug


> -Bruce



-- 
Best regards,
 Sander                            mailto:linux@xxxxxxxxxxxxxx


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