linux-kernel - Re: [Patch 0/2] sysfs: fix s

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Message-ID: <1265384517.30057.50.camel@laptop>
Date:	Fri, 05 Feb 2010 16:41:57 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg KH <gregkh@...e.de>, Thomas Gleixner <tglx@...utronix.de>,
	Cong Wang <amwang@...hat.com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>, Miles Lane <miles.lane@...il.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Larry Finger <Larry.Finger@...inger.net>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Patch 0/2] sysfs: fix s_active lockdep warning

On Fri, 2010-02-05 at 10:30 -0500, Alan Stern wrote:
> On Fri, 5 Feb 2010, Peter Zijlstra wrote:
> 
> > Right, so this device stuff is much more complicated than I was led to
> > believe ;-)
> 
> Haven't I told you all along that tree-structured locking is
> complicated?  :-)

Well, regular tree's aren't all that complicated, but multiple
inter-locking trees is a whole different story indeed.


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