Hi, today I compiled linux-4.4 kernel on older machine and noticed qemu complains: Jan 11 14:28:58 HOST kernel: vmwrite error: reg 401e value 10 (err 12) Jan 11 14:28:58 HOST kernel: CPU: 0 PID: 6004 Comm: qemu-build Not tainted 4.4.0-0-core2 #1 Jan 11 14:28:58 HOST kernel: Hardware name: /DG35EC, BIOS ECG3510M.86A.0118.2010.0113.1426 01/13/2010 Jan 11 14:28:58 HOST kernel: ffff88007be68000 ffffffff8116e2b9 0000000000000000 ffffffffa020b88d Jan 11 14:28:58 HOST kernel: ffff88007be68000 ffff880061173d80 fffffffffffffff2 ffffffffa01d8fdc Jan 11 14:28:58 HOST kernel: 0000000000000000 00007f7ff40008c0 ffffffffa01b8363 ffffffff81608c98 Jan 11 14:28:58 HOST kernel: Call Trace: Jan 11 14:28:58 HOST kernel: [<ffffffff8116e2b9>] ? dump_stack+0x40/0x57 Jan 11 14:28:58 HOST kernel: [<ffffffffa020b88d>] ? vmx_cpuid_update+0x5d/0x150 [kvm_intel] Jan 11 14:28:58 HOST kernel: [<ffffffffa01d8fdc>] ? kvm_vcpu_ioctl_set_cpuid2+0x4c/0x70 [kvm] Jan 11 14:28:58 HOST kernel: [<ffffffffa01b8363>] ? kvm_arch_vcpu_ioctl+0x903/0xfa0 [kvm] Jan 11 14:28:58 HOST kernel: [<ffffffff810d1401>] ? vunmap_page_range+0x211/0x330 Jan 11 14:28:58 HOST kernel: [<ffffffffa02088ab>] ? vmx_vcpu_load+0x14b/0x1b0 [kvm_intel] Jan 11 14:28:58 HOST kernel: [<ffffffffa01b78a5>] ? kvm_arch_vcpu_load+0x55/0x210 [kvm] Jan 11 14:28:58 HOST kernel: [<ffffffffa01ad29b>] ? kvm_vcpu_ioctl+0xbb/0x510 [kvm] Jan 11 14:28:58 HOST kernel: [<ffffffffa01d9260>] ? kvm_dev_ioctl_get_cpuid+0x210/0x2b0 [kvm] Jan 11 14:28:58 HOST kernel: [<ffffffff810f3a53>] ? do_vfs_ioctl+0x293/0x470 Jan 11 14:28:58 HOST kernel: [<ffffffff81034556>] ? __do_page_fault+0x146/0x380 Jan 11 14:28:58 HOST kernel: [<ffffffff810f3c66>] ? SyS_ioctl+0x36/0x70 Jan 11 14:28:58 HOST kernel: [<ffffffff812d4eee>] ? entry_SYSCALL_64_fastpath+0x12/0x71 Jan 11 14:28:58 HOST kernel: vmwrite error: reg 401e value 10 (err 12) Jan 11 14:28:58 HOST kernel: CPU: 0 PID: 6005 Comm: qemu-build Not tainted 4.4.0-0-core2 #1 Jan 11 14:28:58 HOST kernel: Hardware name: /DG35EC, BIOS ECG3510M.86A.0118.2010.0113.1426 01/13/2010 Jan 11 14:28:58 HOST kernel: ffff88004af40000 ffffffff8116e2b9 0000000000000000 ffffffffa020b88d Jan 11 14:28:58 HOST kernel: ffff88004af40000 ffff88007bc83d80 fffffffffffffff2 ffffffffa01d8fdc Jan 11 14:28:58 HOST kernel: 0000000000000000 00007f7fec0008c0 ffffffffa01b8363 ffffffff81608c98 Jan 11 14:28:58 HOST kernel: Call Trace: Jan 11 14:28:58 HOST kernel: [<ffffffff8116e2b9>] ? dump_stack+0x40/0x57 Jan 11 14:28:58 HOST kernel: [<ffffffffa020b88d>] ? vmx_cpuid_update+0x5d/0x150 [kvm_intel] Jan 11 14:28:58 HOST kernel: [<ffffffffa01d8fdc>] ? kvm_vcpu_ioctl_set_cpuid2+0x4c/0x70 [kvm] Jan 11 14:28:58 HOST kernel: [<ffffffffa01b8363>] ? kvm_arch_vcpu_ioctl+0x903/0xfa0 [kvm] Jan 11 14:28:58 HOST kernel: [<ffffffff810d1401>] ? vunmap_page_range+0x211/0x330 Jan 11 14:28:58 HOST kernel: [<ffffffffa02088ab>] ? vmx_vcpu_load+0x14b/0x1b0 [kvm_intel] Jan 11 14:28:58 HOST kernel: [<ffffffffa01b78a5>] ? kvm_arch_vcpu_load+0x55/0x210 [kvm] Jan 11 14:28:58 HOST kernel: [<ffffffffa01ad29b>] ? kvm_vcpu_ioctl+0xbb/0x510 [kvm] Jan 11 14:28:58 HOST kernel: [<ffffffffa01d9260>] ? kvm_dev_ioctl_get_cpuid+0x210/0x2b0 [kvm] Jan 11 14:28:58 HOST kernel: [<ffffffff810f3a53>] ? do_vfs_ioctl+0x293/0x470 Jan 11 14:28:58 HOST kernel: [<ffffffff81034556>] ? __do_page_fault+0x146/0x380 Jan 11 14:28:58 HOST kernel: [<ffffffff810f3c66>] ? SyS_ioctl+0x36/0x70 Jan 11 14:28:58 HOST kernel: [<ffffffff812d4eee>] ? entry_SYSCALL_64_fastpath+0x12/0x71 # uname -r; cat /proc/cpuinfo | grep -E -m 2 "(flags|name)" 4.4.0-0-core2 model name : Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz 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 lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm dtherm tpr_shadow # uname -r; cat /proc/cpuinfo | grep -E -m 2 "(flags|name)" 4.4.0-0-core2 model name : Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx lm constant_tsc arch_perfmon nopl pni ssse3 cx16 x2apic tsc_deadline_timer hypervisor lahf_lm tsc_adjust # rpm -q qemu-kvm qemu-kvm-0.12.1.2-2.479.el6_7.3.x86_64 Not sure if it's something new, HOST with 4.1 kernel didn't complain... TIA Z. -- 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
