From: Peter Zijlstra <peterz@infradead.org>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
linux-kernel@vger.kernel.org,
Alan Stern <stern@rowland.harvard.edu>,
Andrea Parri <parri.andrea@gmail.com>,
Will Deacon <will.deacon@arm.com>,
Boqun Feng <boqun.feng@gmail.com>,
Nicholas Piggin <npiggin@gmail.com>,
David Howells <dhowells@redhat.com>,
Jade Alglave <j.alglave@ucl.ac.uk>,
Luc Maranget <luc.maranget@inria.fr>,
Akira Yokosawa <akiyks@gmail.com>
Subject: Re: [PATCH] memory-model: fix cheat sheet typo
Date: Wed, 11 Apr 2018 18:31:57 +0200 [thread overview]
Message-ID: <20180411163157.GQ4082@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20180411161956.GQ3948@linux.vnet.ibm.com>
On Wed, Apr 11, 2018 at 09:19:56AM -0700, Paul E. McKenney wrote:
> >
> > Prior Operation Subsequent Operation
> > --------------- ---------------------
> > R W RMW SV R W DR DW RMW SV
> > - - --- -- - - -- -- --- --
> > smp_store_mb() Y Y Y Y Y Y Y Y Y Y
I'm not sure about that, the generic version of that reads:
include/asm-generic/barrier.h:#define __smp_store_mb(var, value) do { WRITE_ONCE(var, value); __smp_mb(); } while (0)
Which doesn't not have an smp_mb() before, so it doesn't actually order
prior; or I'm failing to read the table wrong.
next prev parent reply other threads:[~2018-04-11 16:32 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-09 16:50 Paolo Bonzini
2018-04-09 18:42 ` Paul E. McKenney
2018-04-10 20:32 ` Paul E. McKenney
2018-04-10 21:10 ` Paolo Bonzini
2018-04-10 21:34 ` Paul E. McKenney
2018-04-11 11:15 ` Paolo Bonzini
2018-04-11 16:19 ` Paul E. McKenney
2018-04-11 16:31 ` Peter Zijlstra [this message]
2018-04-11 17:06 ` Paolo Bonzini
2018-04-12 12:52 ` Boqun Feng
2018-04-12 9:23 ` Andrea Parri
2018-04-12 10:18 ` Paolo Bonzini
2018-04-12 11:21 ` Andrea Parri
2018-04-12 21:18 ` Paul E. McKenney
2018-04-13 9:54 ` Andrea Parri
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