Re: just a dump

Hans de Bruin
2009-05-21T10:22:08Z

Marcelo Tosatti wrote:
> On Sat, May 16, 2009 at 10:38:25AM +0200, Hans de Bruin wrote:
>> I ran memtest for 11 hours and it completed 4.7 passes with no problems.
>> But then memtest is about cpu and memmory interaction. If the problem is
>> disk related there is also disk/chipset/dma and memmory interaction. I
>> could degrade my system by turning dma on disk io off, or i could have a
>> closer look at kvm-autotest.
>
> Hans,
>
> It would be helpful if you can capture a few more KVM oopses, then.
>

v2.6.30-rc6-144-g5805977
kvm-86-122-ge2478f5
kvm from kernel
simultaneously booting two w2k8.
One vm dies:

[ 167.829503] rmap_remove: ffff8801079a7a00 800000017c5c6047 1->BUG
[ 167.829510] ------------[ cut here ]------------
[ 167.829513] kernel BUG at arch/x86/kvm/mmu.c:582!
[ 167.829515] invalid opcode: 0000 [#1] SMP
[ 167.829518] last sysfs file:
/sys/devices/pci0000:00/0000:00:10.0/0000:01:09.0/resource
[ 167.829520] CPU 1
[ 167.829522] Modules linked in:
[ 167.829526] Pid: 2908, comm: qemu-system-x86 Not tainted 2.6.30-rc6
#5 System Product Name
[ 167.829528] RIP: 0010:[<ffffffff80216fff>] [<ffffffff80216fff>]
rmap_remove+0xdf/0x200
[ 167.829536] RSP: 0018:ffff8801a13f19f8 EFLAGS: 00010292
[ 167.829538] RAX: 0000000000000049 RBX: 800000017c5c6047 RCX:
ffffffff809a3b40
[ 167.829541] RDX: ffff88002804d000 RSI: 0000000000000046 RDI:
ffffffff809a3a30
[ 167.829543] RBP: ffff8801a13f1a28 R08: 000000000000ae32 R09:
00000000ffffffff
[ 167.829545] R10: 0000000000000000 R11: 0000000000000000 R12:
000000000017c5c6
[ 167.829548] R13: ffff8801079a7a00 R14: ffff8801094f8580 R15:
ffff8801a121c000
[ 167.829551] FS: 000000004239a950(0063) GS:ffff88002804d000(0000)
knlGS:000007fffffd6000
[ 167.829553] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 167.829556] CR2: 00007fd70812e540 CR3: 00000001a3fb8000 CR4:
00000000000006e0
[ 167.829558] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 167.829560] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[ 167.829563] Process qemu-system-x86 (pid: 2908, threadinfo
ffff8801a13f0000, task ffff8801ae9d1c20)
[ 167.829565] Stack:
[ 167.829566] ffff8801a13f1a28 0000000000035b00 0000000000035b2e
88e0000035b2e867
[ 167.829570] 0000000000000a00 ffff8801094f8580 ffff8801a13f1ac8
ffffffff8021ad8d
[ 167.829574] 0000000000000000 ffff880100000000 000000000003633a
000000000017d5ea
[ 167.829578] Call Trace:
[ 167.829580] [<ffffffff8021ad8d>] paging64_sync_page+0x9d/0x1a0
[ 167.829585] [<ffffffff80218825>] ? rmap_write_protect+0xd5/0x150
[ 167.829589] [<ffffffff8021890b>] kvm_sync_page+0x6b/0x90
[ 167.829592] [<ffffffff8021a1ad>] mmu_sync_children+0xcd/0x120
[ 167.829596] [<ffffffff8021c242>] ? x86_decode_insn+0x412/0xf10
[ 167.829600] [<ffffffff8021a2c2>] mmu_sync_roots+0xc2/0xd0
[ 167.829603] [<ffffffff8021a658>] kvm_mmu_load+0x138/0x200
[ 167.829606] [<ffffffff8022821a>] ? handle_exit+0x14a/0x2c0
[ 167.829610] [<ffffffff80213873>] kvm_arch_vcpu_ioctl_run+0x863/0xaa0
[ 167.829615] [<ffffffff8020b5d5>] ? kvm_vm_ioctl+0x165/0x910
[ 167.829618] [<ffffffff8027cde9>] ? do_futex+0x689/0x9c0
[ 167.829623] [<ffffffff8020cad3>] kvm_vcpu_ioctl+0x5d3/0x790
[ 167.829626] [<ffffffff8022b88e>] ? common_interrupt+0xe/0x13
[ 167.829630] [<ffffffff8024eaeb>] ? __dequeue_entity+0x2b/0x50
[ 167.829633] [<ffffffff802d8fa1>] vfs_ioctl+0x31/0x90
[ 167.829638] [<ffffffff802d92f1>] do_vfs_ioctl+0x2f1/0x4e0
[ 167.829641] [<ffffffff802d9562>] sys_ioctl+0x82/0xa0
[ 167.829645] [<ffffffff8022af6b>] system_call_fastpath+0x16/0x1b
[ 167.829649] Code: 48 85 c0 0f 84 81 00 00 00 a8 01 75 3d 4c 39 e8 0f
84 f4 00 00 00 49 8b 55 00 4c 89 ee 48 c7 c7 f0 2e 7f 80 31 c0 e8 a1 29
04 00 <0f> 0b eb fe 4c 89 e7 e8 f5 2d ff ff eb 9b 48 89 c7 e8 cb 52 ff
[ 167.829675] RIP [<ffffffff80216fff>] rmap_remove+0xdf/0x200
[ 167.829678] RSP <ffff8801a13f19f8>
[ 167.829681] ---[ end trace bee56bd865cfd2e1 ]---