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* commit f8f559422b (KVM: MMU: fast invalidate all mmio sptes) causes hang
@ 2013-07-17 16:32 Markus Trippelsdorf
  2013-07-17 16:42 ` Gleb Natapov
  0 siblings, 1 reply; 15+ messages in thread
From: Markus Trippelsdorf @ 2013-07-17 16:32 UTC (permalink / raw)
  To: kvm, Xiao Guangrong, Gleb Natapov, Marcelo Tosatti, Paolo Bonzini,
	linux-kernel

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.`

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.

-- 
Markus

^ permalink raw reply	[flat|nested] 15+ messages in thread

end of thread, other threads:[~2013-07-17 19:52 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2013-07-17 16:32 commit f8f559422b (KVM: MMU: fast invalidate all mmio sptes) causes hang Markus Trippelsdorf
2013-07-17 16:42 ` Gleb Natapov
2013-07-17 16:57   ` Markus Trippelsdorf
2013-07-17 17:25     ` Xiao Guangrong
2013-07-17 17:34       ` Markus Trippelsdorf
2013-07-17 18:42       ` Markus Trippelsdorf
2013-07-17 18:55         ` Gleb Natapov
2013-07-17 19:00           ` Markus Trippelsdorf
2013-07-17 19:27             ` Xiao Guangrong
2013-07-17 19:38               ` Markus Trippelsdorf
2013-07-17 19:28             ` Gleb Natapov
2013-07-17 19:22         ` Xiao Guangrong
2013-07-17 19:07     ` Xiao Guangrong
2013-07-17 19:31       ` Gleb Natapov
2013-07-17 19:52         ` Xiao Guangrong

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