linux-kernel - Re: Regression - locking (all from 2.6.28)

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Message-Id: <1236277757.5187.360.camel@laptop>
Date:	Thu, 05 Mar 2009 19:29:17 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	jan sonnek <ha2nny@...il.com>, linux-kernel@...r.kernel.org,
	viro@...iv.linux.org.uk, Andy Whitcroft <apw@...dowen.org>
Subject: Re: Regression - locking (all from 2.6.28)

On Thu, 2009-03-05 at 18:04 +0000, Catalin Marinas wrote:
> 
> BTW, is there a way to know whether the page is in use or on the free
> list? Is page_count(page) feasible?

page_count() == 0, means that the page is not used.
PageBuddy() means its on the freelist.

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