linux-kernel - Re: [PATCH 1/1] mm: thp: Redefine default THP defrag behaviour disable it by default

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Message-ID: <20160225230824.GG1180@redhat.com>
Date:	Fri, 26 Feb 2016 00:08:24 +0100
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	Mel Gorman <mgorman@...hsingularity.net>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Vlastimil Babka <vbabka@...e.cz>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] mm: thp: Redefine default THP defrag behaviour
 disable it by default

On Fri, Feb 26, 2016 at 12:02:19AM +0100, Andrea Arcangeli wrote:
> Let's first agree if direct compaction is going to hurt also for the
> MADV_HUGEPAGE case. I say MADV_HUGEPAGE benefits from direct
> compaction and is not hurt by not doing direct compaction. If you
                    ^^^ drop this not sorry for any confusion :)
> agree with this concept, I'd ask to change your patch, because your
> patch in turn is hurting MADV_HUGEPAGE users.