Re: just a dump

[Hans de Bruin <bruinjm@xs4all.nl>]

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 ]---