On 2013.07.17 at 19:42 +0300, Gleb Natapov wrote: > On Wed, Jul 17, 2013 at 06:32:15PM +0200, Markus Trippelsdorf wrote: > > The following commit: > > commit f8f559422b6c6a05469dfde614b67789b6142cb5 > > Author: Xiao Guangrong <xiaoguangr...@linux.vnet.ibm.com> > > Date: Fri Jun 7 16:51:26 2013 +0800 > > > > KVM: MMU: fast invalidate all mmio sptes > > > > causes my kvm qemu qcow2 images to hang when they switch from the boot > > console to the desktop. For example: > > qemu-system-x86_64 -enable-kvm -net nic,vlan=0,model=virtio -net user > > -drive file=ubuntu,if=virtio,cache=unsafe -smp 2 -m 1024 > > boots normally at first, but then hangs as soon as Xorg gets started.` > > > Which guest is is exactly and how reproducible is this?
Ubuntu 12.04. It's 100% reproducible or else it wouldn't have been so easily bisectable. > > Perf top shows: > > 20.99% [kernel] [k] svm_vcpu_run > > 17.24% [kernel] [k] > > handle_mmio_page_fault_common > > 15.61% [kernel] [k] > > kvm_arch_vcpu_ioctl_run > > 12.49% [kernel] [k] > > fast_page_fault.part.78 > > > > I'm running: > > QEMU emulator version 1.4.2 > > on an AMD PhenomII X4 CPU. > > > What is the output of "cat /proc/cpuinfo"? processor : 0 vendor_id : AuthenticAMD cpu family : 16 model : 4 model name : AMD Phenom(tm) II X4 955 Processor stepping : 2 microcode : 0x10000db cpu MHz : 800.000 cache size : 512 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 4 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save bogomips : 6424.73 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate ... *4 -- Markus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
