linux-kernel - Re: [PATCH v2 1/4] mm: completely disable THP by transparent

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Date:	Wed, 22 Jun 2011 11:11:24 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Andrea Arcangeli <aarcange@...hat.com>
CC:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	Randy Dunlap <rdunlap@...otime.net>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <jweiner@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-doc@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v2 1/4] mm: completely disable THP by transparent_hugepage=0

于 2011年06月21日 21:30, Andrea Arcangeli 写道:
> On Tue, Jun 21, 2011 at 04:10:42PM +0800, Amerigo Wang wrote:
>> Introduce "transparent_hugepage=0" to totally disable THP.
>> "transparent_hugepage=never" means setting THP to be partially
>> disabled, we need a new way to totally disable it.
>>
>
> I think I already clarified this is not worth it. Removing sysfs
> registration is just pointless. If you really want to save ~8k of RAM,
> at most you can try to move the init of the khugepaged slots hash and
> the kmem_cache_init to the khugepaged deamon start but even that isn't
> so useful. Not registering into sysfs is just pointless and it's a
> gratuitous loss of a feature.

Sorry, I replied to you in the other thread, so I don't want to dup
it here.

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