lkml.org 
[lkml]   [2013]   [Jul]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: commit f8f559422b (KVM: MMU: fast invalidate all mmio sptes) causes hang
On Wed, Jul 17, 2013 at 06:32:15PM +0200, Markus Trippelsdorf wrote:
> The following commit:
> commit f8f559422b6c6a05469dfde614b67789b6142cb5
> Author: Xiao Guangrong <xiaoguangrong@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?

> 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"?

--
Gleb.


\
 
 \ /
  Last update: 2013-07-17 21:21    [W:0.141 / U:0.000 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site