linux-kernel - Re: commit f8f559422b (KVM: MMU: fast invalidate all mmio sptes) causes hang

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Date:	Wed, 17 Jul 2013 19:34:42 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	Xiao Guangrong <xiaoguangrong.eric@...il.com>
Cc:	Gleb Natapov <gleb@...hat.com>, kvm@...r.kernel.org,
	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: commit f8f559422b (KVM: MMU: fast invalidate all mmio sptes)
 causes hang

On 2013.07.18 at 01:25 +0800, Xiao Guangrong wrote:
> Hi Markus,
> 
> Thanks for your report! I am downloading the ubuntu iso and will try to reproducible it.

Please note that the exact guest doesn't matter. I first noticed the
hang when I tried to install Fedora 19 today.

> 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?

I will run this later.

> Just check, your host is 64-bit or 32 bit? 

Both guest and host are 64-bit.

-- 
Markus
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