linux-kernel - Re: [RFC][PATCH] proc: export more page flags in /proc/kpageflags (take 3)

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Message-ID: <20090423085405.GL13896@one.firstfloor.org>
Date:	Thu, 23 Apr 2009 10:54:06 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [RFC][PATCH] proc: export more page flags in /proc/kpageflags (take 3)

> Good idea.
> 
> Would you recommend a good way to identify huge pages?
> Test by page order, or by (dtor == free_huge_page)?      

That doesn't work for GB pages. The best way would be to make
slub stop using it and then check for compound, but I don't know what 
this implies. Otherwise would need some other way, perhaps a new
flag?

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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