linux-kernel - Re: [PATCH 0/3] Synaptics

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Message-Id: <1158260584.4200.3.camel@laptopd505.fenrus.org>
Date:	Thu, 14 Sep 2006 21:03:03 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Jiri Kosina <jikos@...os.cz>, lkml <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH 0/3] Synaptics - fix lockdep warnings


> 
> I think it is - as far as I understand the reason for not tracking
> every lock individually is just that it is too expensive to do by
> default.

that is not correct. While it certainly plays a role, 
the other reason is that you can find out "class" level locking rules
(such as inode->i_mutex comes before <other lock>) for all inodes at a
time; eg no need to see every inode do this before you can find the
deadlock. 


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