linux-kernel - Re: [PATCH v10 0/5] make balloon pages movable by compaction

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Message-ID: <20120925011725.GB22893@redhat.com>
Date:	Tue, 25 Sep 2012 03:17:25 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rafael Aquini <aquini@...hat.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mel@....ul.ie>,
	Andi Kleen <andi@...stfloor.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 v10 0/5] make balloon pages movable by compaction

On Mon, Sep 17, 2012 at 03:15:31PM -0700, Andrew Morton wrote:
> How can a patchset reach v10 and have zero Reviewed-by's?

I think the problem is, this adds an API between mm and balloon
device that is pretty complex: consider that previously we literally
only used alloc_page, __free_page and page->lru field.

So you end up with a problem: mm bits don't do anything
by themselves so mm people aren't very interested and
don't know about virtio anyway, while
we virtio device driver people lack a clue about compaction.

Having said that I think I'm getting my head about some of the issues so
I commented and the patchset is hopefully getting there.

-- 
MST
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