linux-kernel - Re: [PATCH 1/3] mm: completely disable THP by transparent

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Message-ID: <20110620165844.GA9396@suse.de>
Date:	Mon, 20 Jun 2011 17:58:45 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Amerigo Wang <amwang@...hat.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	Andrea Arcangeli <aarcange@...hat.com>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <jweiner@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-mm@...ck.org
Subject: Re: [PATCH 1/3] mm: completely disable THP by
 transparent_hugepage=never

On Tue, Jun 21, 2011 at 12:34:28AM +0800, Amerigo Wang wrote:
> transparent_hugepage=never should mean to disable THP completely,
> otherwise we don't have a way to disable THP completely.
> The design is broken.
> 

I don't get why it's broken. Why would the user be prevented from
enabling it at runtime?

-- 
Mel Gorman
SUSE Labs
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