linux-kernel - Re: [PATCH v2 0/5] KVM: x86: improve reexecute

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Message-ID: <20121223114636.GQ17584@redhat.com>
Date:	Sun, 23 Dec 2012 13:46:36 +0200
From:	Gleb Natapov <gleb@...hat.com>
To:	Marcelo Tosatti <mtosatti@...hat.com>
Cc:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH v2 0/5] KVM: x86: improve reexecute_instruction

On Fri, Dec 14, 2012 at 11:05:46PM -0200, Marcelo Tosatti wrote:
> On Fri, Dec 14, 2012 at 12:50:09PM +0800, Xiao Guangrong wrote:
> > >>> program a timer interrupt and #GP? 
> > >>
> > >> Could you please explain the detail?
> > > 
> > > Before the instruction which writes continuously to the pagetable, arm
> > > say lapic timer. #GP on the interrupt handler and test with failure.
> > 
> > Sorry, I am confused about this. After Qemu exits due to KVM_EXIT_INTERNAL_ERROR,
> > the vm is stopped then interrupt can not be injected to guest. Or i missed something?
> 
> Yes, but without fixed kernel kvm-unit test executable loops continuously.
> Perhaps its more appropriate to fix generically, nevermind.
This will not be the first test that makes kvm-unit-test hang on non
fixed kernels.

--
			Gleb.
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