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From: Ingo Molnar <mingo@kernel.org>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Dmitry Vyukov <dvyukov@google.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Thomas Gleixner <tglx@linutronix.de>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [GIT PULL] locking changes for v4.4
Date: Wed, 4 Nov 2015 15:56:27 +0100	[thread overview]
Message-ID: <20151104145627.GA2943@gmail.com> (raw)
In-Reply-To: <20151104135431.GS29027@linux.vnet.ibm.com>


* Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:

> On Wed, Nov 04, 2015 at 12:48:50PM +0100, Ingo Molnar wrote:
> > 
> > * Linus Torvalds <torvalds@linux-foundation.org> wrote:
> > 
> > > On Tue, Nov 3, 2015 at 3:58 PM, Linus Torvalds
> > > <torvalds@linux-foundation.org> wrote:
> > > >
> > > > I think I'll pull this, but then just make a separate commit to remove
> > 
> > Thanks!
> > 
> > > > all the bogus games with "control" dependencies that seem to have no basis is 
> > > > reality.
> > > 
> > > So the attached is what I committed in my tree. [...]
> > 
> > Acked-by: Ingo Molnar <mingo@kernel.org>
> > 
> > > +      dependency into nonexistence.  Careful use of READ_ONCE() or
> > > +      atomic{,64}_read() can help to preserve your control dependency.
> > > +      Please see the Compiler Barrier section for more information.
> > 
> > So technically it's the "COMPILER BARRIER" section, but this is a pre-existing 
> > formulation and the document doesn't use such references consistently so I guess 
> > it doesn't matter much.
> 
> I will take a pass through and fix these up.  I don't see this as urgent,
> so will add it to my patches for the next merge window.

Sounds good to me!

Thanks,

	Ingo

      reply	other threads:[~2015-11-04 14:56 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-03  9:16 [GIT PULL] locking changes for v4.4 Ingo Molnar
2015-11-03 23:54 ` Linus Torvalds
2015-11-03 23:58   ` Linus Torvalds
2015-11-04  1:30     ` Linus Torvalds
2015-11-04  4:16       ` Paul E. McKenney
2015-11-04 14:51         ` Dmitry Vyukov
2015-11-04 16:01           ` Peter Zijlstra
2015-11-04 16:09             ` Dmitry Vyukov
2015-11-04 11:37       ` Peter Zijlstra
2015-11-04 13:55         ` Paul E. McKenney
2015-11-04 11:48       ` Ingo Molnar
2015-11-04 13:54         ` Paul E. McKenney
2015-11-04 14:56           ` Ingo Molnar [this message]

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