linux-kernel - Re: [PATCH tip/core/rcu 1/6] rcu: Update documentation to cover call_srcu() and srcu

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20120615211643.GJ2389@linux.vnet.ibm.com>
Date:	Fri, 15 Jun 2012 14:16:43 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Josh Triplett <josh@...htriplett.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com, eric.dumazet@...il.com, darren@...art.com,
	fweisbec@...il.com, patches@...aro.org
Subject: Re: [PATCH tip/core/rcu 1/6] rcu: Update documentation to cover
 call_srcu() and srcu_barrier().

On Fri, Jun 15, 2012 at 01:19:12PM -0700, Josh Triplett wrote:
> On Fri, Jun 15, 2012 at 11:57:49AM -0700, Paul E. McKenney wrote:
> > --- a/Documentation/RCU/rcubarrier.txt
> > +++ b/Documentation/RCU/rcubarrier.txt
> > @@ -261,8 +261,10 @@ Answers to Quick Quizzes
> >  
> >  Quick Quiz #1: Why is there no srcu_barrier()?
> >  
> > -Answer: Since there is no call_srcu(), there can be no outstanding SRCU
> > -	callbacks. Therefore, there is no need to wait for them.
> > +Answer: There really is an srcu_barrier() now that there is a call_srcu().
> > +	Before call_srcu(), there were no SRCU callbacks, and there was
> > +	therefore no need to wait for them, and therefore there was
> > +	no srcu_barrier().
> 
> I don't think it makes sense to leave this question in its current form
> and just change the answer.  It seems like a trick question now. :)
> 
> I'd suggest just dropping the question and renumbering the remaining
> questions.

But I -like- trick questions!!!  ;-)

I will nevertheless update as suggested.

							Thanx, Paul

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/