linux-kernel - Re: lockdep: how to tell it multiple pte locks is OK?

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Message-ID: <20071007095853.13a8755d@laptopd505.fenrus.org>
Date:	Sun, 7 Oct 2007 09:58:53 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: lockdep: how to tell it multiple pte locks is OK?

On Sat, 06 Oct 2007 23:31:33 -0700

> I'm presume I'm the first person to try holding multiple pte locks at
> once, so there's no existing locking order for these locks.  I'm
> always traversing and locking the pagetable in virtual address order
> (and this seems like a sane-enough rule for anyone else who wants to
> hold multiple pte locks).

I'm not sure that's a valid assumption in light of things like sharing
pagetables between processes etc etc..
(granted, that one is out of tree right now but I still hope it'll go
in some day:)
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