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Date: Sat, 19 Nov 2011 12:18:46 +0400
From: Vasiliy Kulikov <>
To: Andrew Morton <>
Cc: Pavel Emelyanov <>,
	Linux Kernel Mailing List <>,
	Cyrill Gorcunov <>,
	Glauber Costa <>,
	Andi Kleen <>, Tejun Heo <>,
	Matt Helsley <>,
	Pekka Enberg <>,
	Eric Dumazet <>,
Subject: Re: [PATCH v2 0/4] Checkpoint/Restore: Show in proc IDs of objects
 that can be shared between tasks

On Sat, Nov 19, 2011 at 12:10 +0400, Vasiliy Kulikov wrote:
> Also, if one should have an ability to learn IDs of specific object
> types and the set of types is very limited, it's much safer to have one
> increasing u64 counter for each created object of one of these types.
> The exposed to userspace data will be:
>     ID = hash(counter ^ cookie)

Even hash(counter) without any cookie and counter is randomly generated at boot time.

Vasiliy Kulikov - bringing security into open computing environments

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