linux-kernel - Re: [patch 1/4] Add routine for generating an ID for kernel pointer

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Date:	Wed, 28 Dec 2011 16:51:14 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Cyrill Gorcunov <gorcunov@...nvz.org>
Cc:	linux-kernel@...r.kernel.org,
	Pavel Emelyanov <xemul@...allels.com>,
	Glauber Costa <glommer@...allels.com>,
	Andi Kleen <andi@...stfloor.org>, Tejun Heo <tj@...nel.org>,
	Matt Helsley <matthltc@...ibm.com>,
	Pekka Enberg <penberg@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Vasiliy Kulikov <segoon@...nwall.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [patch 1/4] Add routine for generating an ID for kernel pointer

> +	  be used for anything but the "sameness" test. Besides, the IDs are
> +	  dynamic and valid only while object is alive, once it get freed or

Please explain your locking model which ensures a false sameness cannot
occur due to object reuse as you do the comparison and scan.

Alan
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