linux-kernel - Re: [PATCH v13 2/8] start vm after resetting it

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Message-ID: <20130305030557.GL16362@localhost.localdomain>
Date:	Tue, 5 Mar 2013 11:05:57 +0800
From:	Hu Tao <hutao@...fujitsu.com>
To:	Jan Kiszka <jan.kiszka@...mens.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>,
	Gleb Natapov <gleb@...hat.com>,
	Blue Swirl <blauwirbel@...il.com>,
	Eric Blake <eblake@...hat.com>,
	Andrew Jones <drjones@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Sasha Levin <levinsasha928@...il.com>,
	Luiz Capitulino <lcapitulino@...hat.com>,
	Anthony Liguori <aliguori@...ibm.com>,
	Markus Armbruster <armbru@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Stefan Hajnoczi <stefanha@...hat.com>,
	Juan Quintela <quintela@...hat.com>,
	Orit Wasserman <owasserm@...hat.com>,
	Kevin Wolf <kwolf@...hat.com>,
	Wen Congyang <wency@...fujitsu.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Alexander Graf <agraf@...e.de>,
	Alex Williamson <alex.williamson@...hat.com>,
	Peter Maydell <peter.maydell@...aro.org>
Subject: Re: [PATCH v13 2/8] start vm after resetting it

On Thu, Feb 28, 2013 at 02:23:42PM +0100, Jan Kiszka wrote:
> On 2013-02-28 13:13, 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).
> 
> I just wonder what will happen if I interrupted the guest via gdb and
> then issue "monitor system_reset", also via gdb - common pattern if you
> set a breakpoint on some BUG() or fault handler and then want to restart
> the guest. Will the guest continue then while gdb thinks it is still
> stopped? Likely, we do not differentiate between gdb-initiated stops and
> the rest. Could you clarify?

Guest won't continue unless issue gdb "continue". Anyway, I'll seperate
this patch, as Paolo requested.
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