You should also Cc mm ML On Thu, Jul 03, 2014 at 12:57:04AM -0700, jipan yang wrote: >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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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