Hi, I've seen the problem quite a few times. Before spending more time on it, I'd like to have a quick check here to see if anyone ever saw the same problem? Hope it is a relevant question with this mail list. Jul 2 11:08:21 arno-3 kernel: [ 2165.078623] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 Jul 2 11:08:21 arno-3 kernel: [ 2165.078916] IP: [<ffffffff8118d0fa>] copy_huge_page+0x8a/0x2a0 Jul 2 11:08:21 arno-3 kernel: [ 2165.079128] PGD 0 Jul 2 11:08:21 arno-3 kernel: [ 2165.079198] Oops: 0000 [#1] SMP Jul 2 11:08:21 arno-3 kernel: [ 2165.079319] Modules linked in: ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables kvm_intel kvm bridge stp llc ast ttm drm_kms_helper drm sysimgblt sysfillrect syscopyarea lp mei_me ioatdma ext2 parport mei shpchp dcdbas joydev mac_hid lpc_ich acpi_pad wmi hid_generic usbhid hid ixgbe igb dca i2c_algo_bit ahci ptp libahci mdio pps_core Jul 2 11:08:21 arno-3 kernel: [ 2165.081090] CPU: 19 PID: 3494 Comm: qemu-system-x86 Not tainted 3.11.0-15-generic #25~precise1-Ubuntu Jul 2 11:08:21 arno-3 kernel: [ 2165.081424] Hardware name: Dell Inc. PowerEdge C6220 II/09N44V, BIOS 2.0.3 07/03/2013 Jul 2 11:08:21 arno-3 kernel: [ 2165.081705] task: ffff881026750000 ti: ffff881026056000 task.ti: ffff881026056000 Jul 2 11:08:21 arno-3 kernel: [ 2165.081973] RIP: 0010:[<ffffffff8118d0fa>] [<ffffffff8118d0fa>] copy_huge_page+0x8a/0x2a0 Jul 2 11:08:21 arno-3 kernel: [ 2165.082267] RSP: 0018:ffff881026057768 EFLAGS: 00010246 Jul 2 11:08:21 arno-3 kernel: [ 2165.082455] RAX: 0000000000200000 RBX: ffffffff81f9aa20 RCX: 0000000000000012 Jul 2 11:08:21 arno-3 kernel: [ 2165.082710] RDX: ffffffff81f9aa20 RSI: 0000000000001000 RDI: ffffea0077f28000 Jul 2 11:08:21 arno-3 kernel: [ 2165.082963] RBP: ffff8810260577b8 R08: 0000000000000000 R09: 00000000000001ff Jul 2 11:08:21 arno-3 kernel: [ 2165.083217] R10: ffffffffffffffff R11: 0000000000017960 R12: ffffea0077f28000 Jul 2 11:08:21 arno-3 kernel: [ 2165.083471] R13: 0000000000000001 R14: 020400000008407d R15: ffffea003a9b8000 Jul 2 11:08:21 arno-3 kernel: [ 2165.083727] FS: 00007f19d799a700(0000) GS:ffff88203ef20000(0000) knlGS:0000000000000000 Jul 2 11:08:21 arno-3 kernel: [ 2165.084019] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jul 2 11:08:21 arno-3 kernel: [ 2165.084222] CR2: 0000000000000008 CR3: 0000002023b1c000 CR4: 00000000001427e0 Jul 2 11:08:21 arno-3 kernel: [ 2165.084477] Stack: Jul 2 11:08:21 arno-3 kernel: [ 2165.084540] ffff881026057788 ffffffff81156460 ffff88207fff8000 ffffea0077f28000 Jul 2 11:08:21 arno-3 kernel: [ 2165.084802] ffff881026057798 ffffea003a9b8000 ffffea0077f28000 0000000000000001 Jul 2 11:08:21 arno-3 kernel: [ 2165.085064] 020400000008407d ffff881026f11260 ffff8810260577e8 ffffffff8119fee9 Jul 2 11:08:21 arno-3 kernel: [ 2165.085326] Call Trace: Jul 2 11:08:21 arno-3 kernel: [ 2165.085418] [<ffffffff81156460>] ? put_compound_page+0x40/0x70 Jul 2 11:08:21 arno-3 kernel: [ 2165.085633] [<ffffffff8119fee9>] migrate_page_copy+0x39/0x250 Jul 2 11:08:21 arno-3 kernel: [ 2165.085844] [<ffffffff811a171c>] migrate_misplaced_transhuge_page+0x16c/0x4d0 Jul 2 11:08:21 arno-3 kernel: [ 2165.086106] [<ffffffff811a4429>] do_huge_pmd_numa_page+0x169/0x2d0 Jul 2 11:08:21 arno-3 kernel: [ 2165.086332] [<ffffffff81174014>] handle_mm_fault+0x2c4/0x3e0 Jul 2 11:08:21 arno-3 kernel: [ 2165.086539] [<ffffffff81174378>] __get_user_pages+0x178/0x5c0 Jul 2 11:08:21 arno-3 kernel: [ 2165.086756] [<ffffffff8105a340>] ? gup_pmd_range+0xd0/0xf0 Jul 2 11:08:21 arno-3 kernel: [ 2165.086972] [<ffffffffa0228bee>] hva_to_pfn_slow+0x9e/0x150 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.087206] [<ffffffffa022a8e5>] hva_to_pfn+0xd5/0x210 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.087423] [<ffffffffa022a730>] ? kvm_release_pfn_clean+0x50/0x60 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.087686] [<ffffffffa024b3c8>] ? mmu_set_spte+0x138/0x270 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.087920] [<ffffffffa022aacd>] __gfn_to_pfn_memslot+0xad/0xb0 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.088166] [<ffffffffa022ab47>] __gfn_to_pfn+0x57/0x70 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.088389] [<ffffffffa022abba>] gfn_to_pfn_async+0x1a/0x20 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.088628] [<ffffffffa024a53a>] try_async_pf+0x4a/0x90 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.088849] [<ffffffffa022cbbb>] ? kvm_host_page_size+0x9b/0xb0 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.089098] [<ffffffffa024cc9b>] tdp_page_fault+0x10b/0x220 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.089334] [<ffffffffa0249861>] kvm_mmu_page_fault+0x31/0x70 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.098035] [<ffffffffa02e03de>] handle_ept_violation+0x7e/0x150 [kvm_intel] Jul 2 11:08:21 arno-3 kernel: [ 2165.106835] [<ffffffffa02e4277>] vmx_handle_exit+0xa7/0x270 [kvm_intel] Jul 2 11:08:21 arno-3 kernel: [ 2165.115677] [<ffffffffa02421a7>] vcpu_enter_guest+0x447/0x770 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.124374] [<ffffffff8107548f>] ? recalc_sigpending+0x1f/0x60 Jul 2 11:08:21 arno-3 kernel: [ 2165.132901] [<ffffffffa0242688>] __vcpu_run+0x1b8/0x2f0 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.141395] [<ffffffffa024285d>] kvm_arch_vcpu_ioctl_run+0x9d/0x170 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.149999] [<ffffffffa022b14b>] kvm_vcpu_ioctl+0x43b/0x600 [kvm] Jul 2 11:08:21 arno-3 kernel: [ 2165.158390] [<ffffffff811c5f9c>] do_vfs_ioctl+0x7c/0x2f0 Jul 2 11:08:21 arno-3 kernel: [ 2165.166509] [<ffffffff811c62a1>] SyS_ioctl+0x91/0xb0 Jul 2 11:08:21 arno-3 kernel: [ 2165.174332] [<ffffffff81013dc5>] ? do_notify_resume+0x75/0xc0 Jul 2 11:08:21 arno-3 kernel: [ 2165.181934] [<ffffffff8175099d>] system_call_fastpath+0x1a/0x1f Jul 2 11:08:21 arno-3 kernel: [ 2165.189323] Code: f9 81 48 d3 e6 48 39 c6 74 2a be 00 10 00 00 eb 0e 8b 4b 08 48 89 f7 48 d3 e7 48 39 c7 74 15 48 81 c3 60 0b 00 00 48 39 d3 72 e6 <8b> 0c 25 08 00 00 00 31 db 41 bc 01 00 00 00 44 89 e0 d3 e0 3d Jul 2 11:08:21 arno-3 kernel: [ 2165.204645] RIP [<ffffffff8118d0fa>] copy_huge_page+0x8a/0x2a0 Jul 2 11:08:21 arno-3 kernel: [ 2165.212110] RSP <ffff881026057768> Jul 2 11:08:21 arno-3 kernel: [ 2165.219402] CR2: 0000000000000008 Jul 2 11:08:21 arno-3 kernel: [ 2165.289865] ---[ end trace f74046a6ced0c2fb ]--- root@arno-3:~# modinfo kvm filename: /lib/modules/3.11.0-15-generic/kernel/arch/x86/kvm/kvm.ko license: GPL author: Qumranet srcversion: 9A23EA37F64E5A410C92557 depends: intree: Y vermagic: 3.11.0-15-generic SMP mod_unload modversions parm: min_timer_period_us:uint parm: ignore_msrs:bool parm: tsc_tolerance_ppm:uint parm: allow_unsafe_assigned_interrupts:Enable device assignment on platforms without interrupt remapping support. (bool) root@arno-3:~# cat /proc/cmdline BOOT_IMAGE=/vmlinuz-3.11.0-15-generic root=/dev/mapper/arno--3--vg-root ro default_hugepagesz=1G hugepagesz=1G hugepages=8 isolcpus=0-15 root@arno-3:~# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 62 model name : Intel(R) Xeon(R) CPU E5-2660 v2 @ 2.20GHz stepping : 4 microcode : 0x415 cpu MHz : 1200.000 cache size : 25600 KB physical id : 0 siblings : 20 core id : 0 cpu cores : 10 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms bogomips : 4399.71 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management: .................................................................... processor : 39 vendor_id : GenuineIntel cpu family : 6 model : 62 model name : Intel(R) Xeon(R) CPU E5-2660 v2 @ 2.20GHz stepping : 4 microcode : 0x415 cpu MHz : 1200.000 cache size : 25600 KB physical id : 1 siblings : 20 core id : 12 cpu cores : 10 apicid : 57 initial apicid : 57 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms bogomips : 4401.16 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management: root@arno-3:~# qemu-system-x86_64 -cpu host -boot c -drive file=./dev_stack_ubuntu_12_04.img -m 4092 -cpu host -smp 2 -device e1000,netdev=net0,mac=DE:AD:BE:EF:03:EF -netdev tap,id=net0,script=qemu-ifup --enable-kvm -monitor telnet:127.0.0.1:1234,server,nowait -nographic -serial stdio -vnc :66 Thanks, Jipan -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
