linux-kernel - Re: lguest, Re: -mm merge plans for 2.6.23

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Message-Id: <20070711.192829.08323972.davem@davemloft.net>
Date:	Wed, 11 Jul 2007 19:28:29 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	rusty@...tcorp.com.au
Cc:	hch@....de, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: lguest, Re: -mm merge plans for 2.6.23

From: Rusty Russell <rusty@...tcorp.com.au>
Date: Thu, 12 Jul 2007 11:21:51 +1000

> To do inter-guest (ie. inter-process) I/O you really have to make sure
> the other side doesn't go away.

You should just let it exit and when it does you receive some kind of
exit notification that resets your virtual device channel.

I think the reference counting approach is error and deadlock prone.
Be more loose and let the events reset the virtual devices when
guests go splat.
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