linux-kernel - Re: [patch 10/19] No Reclaim LRU Infrastructure

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Date:	Fri, 11 Jan 2008 13:36:03 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Rik van Riel <riel@...hat.com>
Cc:	kosaki.motohiro@...fujitsu.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Lee Schermerhorn <lee.schermerhorn@...com>
Subject: Re: [patch 10/19] No Reclaim LRU Infrastructure

Hi Rik

> +config NORECLAIM
> +	bool "Track non-reclaimable pages (EXPERIMENTAL; 64BIT only)"
> +	depends on EXPERIMENTAL && 64BIT
> +	help
> +	  Supports tracking of non-reclaimable pages off the [in]active lists
> +	  to avoid excessive reclaim overhead on large memory systems.  Pages
> +	  may be non-reclaimable because:  they are locked into memory, they
> +	  are anonymous pages for which no swap space exists, or they are anon
> +	  pages that are expensive to unmap [long anon_vma "related vma" list.]

Why do you select to default is NO ?
I think this is really improvement and no one of 64bit user
hope turn off without NORECLAIM developer :)


- kosaki


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