linux-kernel - Re: [PATCH] Hugepages should be accounted as unevictable pages.

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Message-Id: <1245800897.31856.28.camel@nimitz>
Date:	Tue, 23 Jun 2009 16:48:17 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	akataria@...are.com
Cc:	Rik van Riel <riel@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Mel Gorman <mel@....ul.ie>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH] Hugepages should be accounted as unevictable pages.

On Tue, 2009-06-23 at 16:28 -0700, Alok Kataria wrote:
> Now regarding the patch that I posted, I need a way to get the
> hugepages count, there are 2 ways of doing this. 
> 1. exporting hugetlb_total_pages function for module usage.

Unfortunately, that won't even be enough.  That only accounts for the
default hstate.  There may be several hstate if the system supports
multiple large page sizes.  It's all exported in sysfs, but I don't see
any simple way (other than sys_open()) for a module to get at it.

-- Dave

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