[Xen-users] Re: OpenSUSE 11.2 Xen HVM guest crash causing BUG() in dom0

[Andrew Lyon <andrew.lyon@xxxxxxxxx>]

Pasi,

I'm not sure if that kernel rpm version includes the swiotlb fixes
that made 2.6.31 reliable on all of my xen systems, it would be a good
idea if the user tries the latest kotd rpm for kernel-xen as that
should be up to date with the git tree which definatly has the
necessary fixes.

Since Jan fixed the swiotlb problems I've not had a single crash with
.31 and I've tested it very thoroughly so I am surprised if there are
still undiscovered bugs.

Andy

On 23/01/2010, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> Hello,
>
> I was talking on irc with an user who had problems with HVM guests
> (freebsd freenas) on OpenSUSE 11.2 Xen 3.4.1.
>
> Andy/Jan: Have you guys seen this before? Is it normal to have
> this kind of BUG()s in dom0, when a guest crashes?
>
> dom0 kernel: 2.6.31.8-0.1-xen x86_64
> Xen: Xen-3.4.1_19718_04-2.1 x86_64
>
> So basicly HVM guest crashes, and then dom0 gets BUG().
>
> Also reported here:
> https://bugzilla.novell.com/show_bug.cgi?id=573305
>
> First:
> (XEN) Domain 4 reported crashed by domain 0 on cpu#0:
>
> then lots of:
>
> (XEN) domain_crash called from p2m.c:1091
> (XEN) p2m_pod_demand_populate: Out of populate-on-demand memory!
>
> And then:
>
> [ 5293.824815] BUG: soft lockup - CPU#0 stuck for 61s! [qemu-dm:6405]
> [ 5293.824815] Modules linked in: tun nf_conntrack_ipv4 nf_defrag_ipv4
> xt_state nf_conntrack xt_physdev iptable_filter ip_tables x_tables netbk
> blkbk blkback_pagemap blktap xenbus_be edd nls_utf8 cifs i915 drm
> i2c_algo_bit video output bridge stp llc fuse loop dm_mod usb_storage 3c59x
> 8250_pnp 8250_pci intel_agp pcspkr heci(C) serio_raw iTCO_wdt wmi sr_mod sg
> iTCO_vendor_support 8250 agpgart container button i2c_i801 serial_core
> i2c_core usbhid hid raid456 raid6_pq async_xor async_memcpy async_tx xor
> raid1 raid0 uhci_hcd ehci_hcd xenblk cdrom xennet fan processor
> ide_pci_generic ide_core ata_generic thermal thermal_sys hwmon
> [ 5293.824815] CPU 0:
> [ 5293.824815] Modules linked in: tun nf_conntrack_ipv4 nf_defrag_ipv4
> xt_state nf_conntrack xt_physdev iptable_filter ip_tables x_tables netbk
> blkbk blkback_pagemap blktap xenbus_be edd nls_utf8 cifs i915 drm
> i2c_algo_bit video output bridge stp llc fuse loop dm_mod usb_storage 3c59x
> 8250_pnp 8250_pci intel_agp pcspkr heci(C) serio_raw iTCO_wdt wmi sr_mod sg
> iTCO_vendor_support 8250 agpgart container button i2c_i801 serial_core
> i2c_core usbhid hid raid456 raid6_pq async_xor async_memcpy async_tx xor
> raid1 raid0 uhci_hcd ehci_hcd xenblk cdrom xennet fan processor
> ide_pci_generic ide_core ata_generic thermal thermal_sys hwmon
> [ 5293.824815] Pid: 6405, comm: qemu-dm Tainted: G         C
> 2.6.31.8-0.1-xen #1 7484A8U
> [ 5293.824815] RIP: e030:[<ffffffff8000802a>]  [<ffffffff8000802a>]
> 0xffffffff8000802a
> [ 5293.824815] RSP: e02b:ffff880028791cc0  EFLAGS: 00000246
> [ 5293.824815] RAX: 00000000ffffffea RBX: 8000000000000427 RCX:
> ffffffff8000802a
> [ 5293.824815] RDX: 0000000000000000 RSI: 0000000000000001 RDI:
> ffff88002f4e5000
> [ 5293.824815] RBP: ffff880028791d38 R08: 0000000000000000 R09:
> ffff880028791d00
> [ 5293.824815] R10: 0000000000000004 R11: 0000000000000246 R12:
> ffff88002f4e5010
> [ 5293.824815] R13: 00007f2512e9d000 R14: 00000000000016f6 R15:
> ffff88002f4e5000
> [ 5293.824815] FS:  00007f251ede76f0(0000) GS:ffffc90000000000(0000)
> knlGS:0000000000000000
> [ 5293.824815] CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 5293.824815] CR2: 00007fd847703000 CR3: 000000001bd9d000 CR4:
> 0000000000002660
> [ 5293.824815] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [ 5293.824815] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> [ 5293.824815] Call Trace:
> [ 5293.824815]  [<ffffffff80026759>] __direct_remap_pfn_range+0x1b9/0x200
> [ 5293.824815]  [<ffffffff80026813>] direct_remap_pfn_range+0x43/0x50
> [ 5293.824815]  [<ffffffff80311a08>] privcmd_ioctl+0x618/0x740
> [ 5293.824815]  [<ffffffff80180772>] proc_reg_unlocked_ioctl+0x92/0x160
> [ 5293.824815]  [<ffffffff8012b510>] vfs_ioctl+0x30/0xd0
> [ 5293.824815]  [<ffffffff8012b6f0>] do_vfs_ioctl+0x90/0x430
> [ 5293.824815]  [<ffffffff8012bb29>] sys_ioctl+0x99/0xb0
> [ 5293.824815]  [<ffffffff8000c868>] system_call_fastpath+0x16/0x1b
> [ 5293.824815]  [<00007f251d26d7e7>] 0x7f251d26d7e7
>
> Full log here:
> http://pastebin.com/m24b0e01
>
> -- Pasi
>
>

-- 
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