Hi Markus, Thanks for your report! I am downloading the ubuntu iso and will try to reproducible it.
Could you please enable these tracepoints: kvmmmu/check_mmio_spte kvmmmu/handle_mmio_page_fault kvmmmu/kvm_mmu_invalidate_zap_all_pages kvmmmu/mark_mmio_spte kvm/kvm_mmio kvm/vcpu_match_mmio and post the output? Just check, your host is 64-bit or 32 bit? On Jul 18, 2013, at 12:57 AM, Markus Trippelsdorf <mar...@trippelsdorf.de> wrote: > 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 kvm" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- 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/
