linux-kernel - Re: [PATCH v12 rebased 2/8] start vm after resetting it

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Message-ID: <20130302000725.GB25309@amt.cnet>
Date:	Fri, 1 Mar 2013 21:07:25 -0300
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Hu Tao <hutao@...fujitsu.com>
Cc:	kvm list <kvm@...r.kernel.org>, qemu-devel <qemu-devel@...gnu.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Daniel P. Berrange" <berrange@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Gleb Natapov <gleb@...hat.com>,
	Blue Swirl <blauwirbel@...il.com>,
	Eric Blake <eblake@...hat.com>,
	Andrew Jones <drjones@...hat.com>,
	Sasha Levin <levinsasha928@...il.com>,
	Luiz Capitulino <lcapitulino@...hat.com>,
	Wen Congyang <wency@...fujitsu.com>
Subject: Re: [PATCH v12 rebased 2/8] start vm after resetting it

On Wed, Feb 20, 2013 at 04:13:49PM +0800, Hu Tao wrote:
> On Thu, Feb 07, 2013 at 11:50:28PM -0200, Marcelo Tosatti wrote:
> > On Wed, Jan 23, 2013 at 03:19:23PM +0800, Hu Tao wrote:
> > > From: Wen Congyang <wency@...fujitsu.com>
> > > 
> > > The guest should run after resetting it, but it does not run if its
> > > old state is RUN_STATE_INTERNAL_ERROR or RUN_STATE_PAUSED.
> > > 
> > > We don't set runstate to RUN_STATE_PAUSED when resetting the guest,
> > > so the runstate will be changed from RUN_STATE_INTERNAL_ERROR or
> > > RUN_STATE_PAUSED to RUN_STATE_RUNNING(not RUN_STATE_PAUSED).
> > 
> > It appears the last hunk will automatically reset state from 
> > RUN_STATE_INTERNAL_ERROR to RUN_STATE_RUNNING ?
> 
> Yes.
> 
> > 
> > I suppose the transition table allows, from RUN_STATE_INTERNAL_ERROR:
> > 
> > <monitor> system_reset
> > <monitor> cont
> > 
> > To resume the machine?
> 
> True.
> 
> I think the purpose of this patch is to always reset and _run_ the guest
> by `system_reset', avoiding an additional `cont' following `system_reset'.

Unclear why its essential to the feature being proposed?

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