lkml.org 
[lkml]   [2012]   [Jun]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subjectkvm segfaults and bad page state in 3.4.0
Hi,

I'm running lots of kvm instances for doing kernel boot tests.
Unfortunately the test system itself is not stable enough, I got scary
errors in both kvm and the host kernel. Like this.

[294025.795382] kvm used greatest stack depth: 2896 bytes left
[310388.622083] kvm[1864]: segfault at c ip 00007f498e9f6a81 sp 00007f4994b9fca0 error 4 in kvm[7f498e960000+33b000]
[310692.050589] kvm[4332]: segfault at 10 ip 00007fca662620b9 sp 00007fca70472af0 error 6 in kvm[7fca661cc000+33b000]
[312608.950120] kvm[18931]: segfault at 8 ip 00007f95962a10a5 sp 00007f959d777170 error 4 in kvm[7f959620b000+33b000]
[312622.941640] kvm[19123]: segfault at 10 ip 00007f406f5580b9 sp 00007f4077d8b350 error 6 in kvm[7f406f4c2000+33b000]
[313917.860951] kvm[28789]: segfault at c ip 00007f718f4dfa81 sp 00007f7198459520 error 4 in kvm[7f718f449000+33b000]
[313919.177192] kvm used greatest stack depth: 2864 bytes left
[314061.390945] kvm used greatest stack depth: 2208 bytes left
[327479.676068] BUG: Bad page state in process kvm pfn:59ac9
[327479.676455] page:ffffea000166b240 count:0 mapcount:0 mapping: (null) index:0x7fd346bc6
[327479.677083] page flags: 0x100000000000014(referenced|dirty)
[327479.677575] Modules linked in:
[327479.677897] Pid: 11423, comm: kvm Not tainted 3.4.0 #131
[327479.678272] Call Trace:
[327479.678538] [<ffffffff81107343>] bad_page+0xe6/0xfb
[327479.678897] [<ffffffff811079c6>] get_page_from_freelist+0x534/0x6f6
[327479.679314] [<ffffffff81107d92>] __alloc_pages_nodemask+0x20a/0x75e
[327479.679729] [<ffffffff8108e121>] ? finish_task_switch+0x4c/0xf6
[327479.680136] [<ffffffff81143477>] ? lookup_page_cgroup_used+0xe/0x24
[327479.680548] [<ffffffff811079b5>] ? get_page_from_freelist+0x523/0x6f6
[327479.680970] [<ffffffff811367c8>] alloc_pages_current+0xd2/0xf3
[327479.681369] [<ffffffff811012e4>] __page_cache_alloc+0xa1/0xae
[327479.681761] [<ffffffff8110b144>] __do_page_cache_readahead+0x107/0x20b
[327479.682188] [<ffffffff8110b0cc>] ? __do_page_cache_readahead+0x8f/0x20b
[327479.682615] [<ffffffff811293b0>] ? anon_vma_prepare+0xb4/0x137
[327479.683010] [<ffffffff8110b521>] ra_submit+0x21/0x25
[327479.683375] [<ffffffff81102f7a>] filemap_fault+0x18a/0x383
[327479.683757] [<ffffffff8111d6b3>] __do_fault+0xc8/0x451
[327479.684128] [<ffffffff81120103>] handle_pte_fault+0x2de/0x844
[327479.684522] [<ffffffff8114446e>] ? mem_cgroup_count_vm_event+0x1a/0x96
[327479.684944] [<ffffffff811218ac>] handle_mm_fault+0x1a6/0x1bb
[327479.685339] [<ffffffff819b8c12>] do_page_fault+0x405/0x42a
[327479.685722] [<ffffffff8112619e>] ? do_mmap_pgoff+0x299/0x2f3
[327479.686115] [<ffffffff813fe03d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[327479.686534] [<ffffffff819b5b45>] page_fault+0x25/0x30
[327479.686898] Disabling lock debugging due to kernel taint
The same host kernel, in another test box:

[770644.256817] kvm_get_msr_common: 2123 callbacks suppressed
[770644.257475] kvm: 31889: cpu0 unhandled rdmsr: 0x2
[770644.258103] kvm: 31889: cpu0 unhandled rdmsr: 0x3
[770644.258707] kvm: 31889: cpu0 unhandled rdmsr: 0x4
[770644.259322] kvm: 31889: cpu0 unhandled rdmsr: 0x5
[770644.259914] kvm: 31889: cpu0 unhandled rdmsr: 0x6
[770644.260499] kvm: 31889: cpu0 unhandled rdmsr: 0x7
[770644.261108] kvm: 31889: cpu0 unhandled rdmsr: 0x8
[770644.261700] kvm: 31889: cpu0 unhandled rdmsr: 0x9
[770644.262302] kvm: 31889: cpu0 unhandled rdmsr: 0xa
[770644.262883] kvm: 31889: cpu0 unhandled rdmsr: 0xb
[909290.636655] kvm[31619]: segfault at 40 ip 00007fcb3d8c4254 sp 00007fcb41bcaec0 error 4 in kvm[7fcb3d82e000+33b000]
Please drop me hints if I can help debugging it (a week later, after
returning from LinuxCon Japan), thank you.

Thanks,
Fengguang


\
 
 \ /
  Last update: 2012-06-04 14:42    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site