linux-kernel - Re: [PATCH v2 2/4] mm: make the threshold of enabling THP configurable

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Message-ID: <4E018060.3050607@redhat.com>
Date:	Wed, 22 Jun 2011 13:40:48 +0800
From:	Cong Wang <amwang@...hat.com>
To:	David Rientjes <rientjes@...gle.com>
CC:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	dave@...ux.vnet.ibm.com, Andrea Arcangeli <aarcange@...hat.com>,
	Mel Gorman <mel@....ul.ie>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-mm@...ck.org
Subject: Re: [PATCH v2 2/4] mm: make the threshold of enabling THP configurable

于 2011年06月22日 11:29, David Rientjes 写道:
>
> Either way, this patch isn't needed since it has no benefit over doing it
> through an init script.

If you were right, CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not needed,
you can do it through an init script.

If you were right, the 512M limit is not needed neither, you have
transparent_hugepage=never boot parameter and do the check of
512M later in an init script. (Actually, moving the 512M check to
user-space is really more sane to me.)

I am quite sure you have lots of other things which both have a Kconfig
and a boot parameter, why do we have it?
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