linux-kernel - Re: [patch 8/9] Documentation: Fix invalid rcu assumptions

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Message-ID: <alpine.LFD.2.00.0912111902350.3089@localhost.localdomain>
Date:	Fri, 11 Dec 2009 19:08:28 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	David Howells <dhowells@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Dipankar Sarma <dipankar@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Oleg Nesterov <oleg@...sign.ru>,
	Al Viro <viro@...iv.linux.org.uk>,
	James Morris <jmorris@...ei.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Randy Dunlap <rdunlap@...otime.net>,
	Vegard Nossum <vegardno@....uio.no>
Subject: Re: [patch 8/9] Documentation: Fix invalid rcu assumptions

On Fri, 11 Dec 2009, Paul E. McKenney wrote:
> On Fri, Dec 11, 2009 at 08:07:45AM -0800, Linus Torvalds wrote:
> > 
> > 
> > On Fri, 11 Dec 2009, David Howells wrote:
> > 
> > > Thomas Gleixner <tglx@...utronix.de> wrote:
> > > 
> > > > -197          * we use RCU protection here
> > > > +196          * caller must be holding the RCU readlocke
> > > 
> > > You mean "readlock" I suspect.
> > 
> > Or maybe he's talking about ye olde readlocke, used widely for OS research 
> > throughout the middle ages. You still find that spelling in some really 
> > old CS literature.
> 
> Interestingly enough, they also tended to split it into two words and
> capitalize it, as can be seen by searching for "Read Locke" at
> 
> 	http://faculty.uml.edu/enelson/modern07.htm

The good thing about "Read Locke" is: there is no "Write Locke".

Thanks,
    	 tglx
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