linux-kernel - Re: [PATCH] mm/balloon_compaction: fix deflation when compaction is disabled

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Date:	Wed, 29 Oct 2014 18:06:19 -0700
From:	Matt Mullins <mmullins@...x.us>
To:	Konstantin Khlebnikov <k.khlebnikov@...sung.com>
Cc:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	Matt Mullins <mmullins@...x.us>, linux-kernel@...r.kernel.org,
	Rafael Aquini <aquini@...hat.com>,
	Sasha Levin <sasha.levin@...cle.com>, stable@...r.kernel.org
Subject: Re: [PATCH] mm/balloon_compaction: fix deflation when compaction
 is disabled

On Wed, Oct 29, 2014 at 02:51:07PM +0400, Konstantin Khlebnikov wrote:
> Fix for commit d6d86c0a7f8ddc5b38cf089222cb1d9540762dc2
> ("mm/balloon_compaction: redesign ballooned pages management").
> 
> If CONFIG_BALLOON_COMPACTION=n balloon_page_insert() does not link
> pages with balloon and doesn't set PagePrivate flag, as a result
> balloon_page_dequeue cannot get any pages because it thinks that
> all of them are isolated. Without balloon compaction nobody can
> isolate ballooned pages, it's safe to remove this check.
> 
> Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@...sung.com>
> Reported-by: Matt Mullins <mmullins@...x.us>
> Cc: Stable <stable@...r.kernel.org>	(v3.17)

That seems to do it, thanks!

Tested-by: Matt Mullins <mmullins@...x.us>
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