From: Gleb Natapov <gleb@redhat.com>
To: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: kvm@vger.kernel.org,
Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: commit f8f559422b (KVM: MMU: fast invalidate all mmio sptes) causes hang
Date: Wed, 17 Jul 2013 19:42:32 +0300 [thread overview]
Message-ID: <20130717164232.GI13732@redhat.com> (raw)
In-Reply-To: <20130717163215.GA359@x4>
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.
next prev parent reply other threads:[~2013-07-17 16:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
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 [this message]
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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