linux-kernel - Re: [PATCH v11 5/7] virtio_balloon: introduce migration primitives to balloon pages

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Message-ID: <20121108003403.GE10444@optiplex.redhat.com>
Date:	Wed, 7 Nov 2012 22:34:04 -0200
From:	Rafael Aquini <aquini@...hat.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mel@....ul.ie>,
	Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Minchan Kim <minchan@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH v11 5/7] virtio_balloon: introduce migration primitives
 to balloon pages

On Thu, Nov 08, 2012 at 09:32:18AM +1030, Rusty Russell wrote:
> The first one can be delayed, the second one can be delayed if the host
> didn't ask for VIRTIO_BALLOON_F_MUST_TELL_HOST (qemu doesn't).
> 
> We could implement a proper request queue for these, and return -EAGAIN
> if the queue fills.  Though in practice, it's not important (it might
> help performance).

I liked the idea. Give me the directions to accomplish it and I'll give it a try
for sure.

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