linux-kernel - Re: [PATCH] workaround minor lockdep bug triggered by mm_take_all

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Message-ID: <adazlnssj6h.fsf@cisco.com>
Date:	Mon, 04 Aug 2008 11:56:38 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Andrea Arcangeli <andrea@...ranet.com>,
	Dave Jones <davej@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	David Miller <davem@...emloft.net>, jeremy@...p.org,
	hugh@...itas.com, mingo@...e.hu, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] workaround minor lockdep bug triggered by mm_take_all_locks

 > NAK, come-on, you didn't even bother to look at the available
 > annotations..

Agree that this trylock-in-a-loop is a horrible hack that should never
be merged.

However I wonder what you think the right way to annotate the
potentially unbounded number of locks taken in mm_take_all_locks() is?

 - R.
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