From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Torvald Riegel <triegel@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Will Deacon <will.deacon@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
David Howells <dhowells@redhat.com>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
"linux-kernel@vger.kernel.org"
<linux-kernel@vger.kernel.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"mingo@kernel.org" <mingo@kernel.org>,
"gcc@gcc.gnu.org" <gcc@gcc.gnu.org>
Subject: Re: [RFC][PATCH 0/5] arch: atomic rework
Date: Thu, 20 Feb 2014 18:12:00 -0000 [thread overview]
Message-ID: <20140220181146.GU4250@linux.vnet.ibm.com> (raw)
In-Reply-To: <1392918846.18779.10204.camel@triegel.csb>
On Thu, Feb 20, 2014 at 06:54:06PM +0100, Torvald Riegel wrote:
> xagsmtp4.20140220175519.1127@vmsdvm6.vnet.ibm.com
> X-Xagent-Gateway: vmsdvm6.vnet.ibm.com (XAGSMTP4 at VMSDVM6)
>
> On Thu, 2014-02-20 at 00:30 -0800, Paul E. McKenney wrote:
> > Well, all the compilers currently convert consume to acquire, so you have
> > your wish there. Of course, that also means that they generate actual
> > unneeded memory-barrier instructions, which seems extremely sub-optimal
> > to me.
>
> GCC doesn't currently, but it also doesn't seem to track the
> dependencies, but that's a bug:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59448
Ah, cool!
Thanx, Paul
next prev parent reply other threads:[~2014-02-20 18:12 UTC|newest]
Thread overview: 279+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20140206134825.305510953@infradead.org>
[not found] ` <21984.1391711149@warthog.procyon.org.uk>
2014-02-06 18:55 ` Ramana Radhakrishnan
2014-02-06 18:59 ` Will Deacon
2014-02-06 19:27 ` Paul E. McKenney
2014-02-06 21:17 ` Torvald Riegel
2014-02-06 22:11 ` Paul E. McKenney
2014-02-06 23:45 ` Torvald Riegel
2014-02-07 4:21 ` Paul E. McKenney
2014-02-07 7:44 ` Peter Zijlstra
2014-02-07 16:50 ` Paul E. McKenney
2014-02-07 16:55 ` Will Deacon
2014-02-07 17:07 ` Peter Zijlstra
2014-02-07 17:13 ` Will Deacon
2014-02-07 17:20 ` Peter Zijlstra
2014-02-07 18:03 ` Paul E. McKenney
2014-02-07 17:46 ` Joseph S. Myers
2014-02-07 18:43 ` Torvald Riegel
2014-02-07 18:02 ` Paul E. McKenney
2014-02-10 0:28 ` Torvald Riegel
2014-02-10 0:56 ` Linus Torvalds
2014-02-10 1:16 ` Torvald Riegel
2014-02-10 1:24 ` Linus Torvalds
2014-02-10 1:46 ` Torvald Riegel
2014-02-10 2:04 ` Linus Torvalds
2014-02-10 3:21 ` Paul E. McKenney
2014-02-10 3:45 ` Paul E. McKenney
2014-02-10 11:46 ` Peter Zijlstra
2014-02-10 19:09 ` Linus Torvalds
2014-02-11 15:59 ` Paul E. McKenney
2014-02-12 6:06 ` Torvald Riegel
2014-02-12 9:19 ` Peter Zijlstra
2014-02-12 17:52 ` Paul E. McKenney
2014-02-12 18:12 ` Peter Zijlstra
2014-02-17 18:18 ` Paul E. McKenney
2014-02-17 20:38 ` Richard Biener
2014-02-17 22:14 ` Paul E. McKenney
2014-02-17 22:27 ` Torvald Riegel
2014-02-14 5:08 ` Torvald Riegel
2014-02-14 9:50 ` Peter Zijlstra
2014-02-14 19:19 ` Torvald Riegel
2014-02-12 17:50 ` Paul E. McKenney
2014-02-12 5:39 ` Torvald Riegel
2014-02-12 18:19 ` Paul E. McKenney
2014-02-12 20:22 ` Linus Torvalds
2014-02-13 0:24 ` Paul E. McKenney
2014-02-13 20:04 ` Torvald Riegel
2014-02-14 2:01 ` Paul E. McKenney
2014-02-14 4:43 ` Torvald Riegel
2014-02-14 17:29 ` Paul E. McKenney
2014-02-14 19:22 ` Torvald Riegel
2014-02-14 19:50 ` Linus Torvalds
2014-02-14 20:02 ` Linus Torvalds
2014-02-15 2:08 ` Paul E. McKenney
2014-02-15 2:44 ` Linus Torvalds
2014-02-15 2:48 ` Linus Torvalds
2014-02-15 6:35 ` Paul E. McKenney
2014-02-15 6:58 ` Paul E. McKenney
2014-02-15 18:07 ` Torvald Riegel
2014-02-17 18:59 ` Joseph S. Myers
2014-02-17 19:19 ` Will Deacon
2014-02-17 19:41 ` Torvald Riegel
2014-02-17 23:13 ` Joseph S. Myers
2014-02-15 17:45 ` Torvald Riegel
2014-02-15 18:49 ` Linus Torvalds
2014-02-17 19:55 ` Torvald Riegel
2014-02-17 20:18 ` Linus Torvalds
2014-02-17 21:21 ` Torvald Riegel
2014-02-17 22:02 ` Linus Torvalds
2014-02-17 22:25 ` Torvald Riegel
2014-02-17 22:48 ` Linus Torvalds
2014-02-17 23:42 ` Torvald Riegel
2014-02-18 0:18 ` Linus Torvalds
2014-02-18 1:26 ` Paul E. McKenney
2014-02-18 15:39 ` Torvald Riegel
2014-02-18 16:55 ` Paul E. McKenney
2014-02-18 19:57 ` Torvald Riegel
2014-02-17 23:10 ` Alec Teal
2014-02-18 0:05 ` Linus Torvalds
2014-02-18 15:31 ` Torvald Riegel
2014-02-18 16:49 ` Linus Torvalds
2014-02-18 17:16 ` Paul E. McKenney
2014-02-18 18:23 ` Peter Sewell
2014-02-18 19:00 ` Linus Torvalds
2014-02-18 19:42 ` Paul E. McKenney
2014-02-18 21:40 ` Torvald Riegel
2014-02-18 21:53 ` Peter Zijlstra
2014-02-19 9:52 ` Torvald Riegel
2014-02-18 22:58 ` Paul E. McKenney
2014-02-19 10:59 ` Torvald Riegel
2014-02-19 15:32 ` Paul E. McKenney
2014-02-19 17:56 ` Torvald Riegel
2014-02-19 22:12 ` Paul E. McKenney
2014-02-18 21:27 ` Torvald Riegel
2014-02-18 21:40 ` Peter Zijlstra
2014-02-18 21:47 ` Torvald Riegel
2014-02-19 15:23 ` David Lang
2014-02-19 18:11 ` Torvald Riegel
2014-02-18 21:47 ` Peter Zijlstra
2014-02-19 11:07 ` Torvald Riegel
2014-02-19 11:42 ` Peter Zijlstra
2014-02-18 22:14 ` Linus Torvalds
2014-02-19 14:41 ` Torvald Riegel
2014-02-19 19:49 ` Linus Torvalds
2014-02-18 3:00 ` Paul E. McKenney
2014-02-18 3:25 ` Linus Torvalds
2014-02-18 3:42 ` Linus Torvalds
2014-02-18 5:22 ` Paul E. McKenney
2014-02-18 16:17 ` Torvald Riegel
2014-02-18 17:44 ` Linus Torvalds
2014-02-18 19:40 ` Paul E. McKenney
2014-02-18 19:48 ` Torvald Riegel
2014-02-20 0:53 ` Linus Torvalds
2014-02-20 4:01 ` Paul E. McKenney
2014-02-20 4:43 ` Linus Torvalds
2014-02-20 8:30 ` Paul E. McKenney
2014-02-20 9:20 ` Paul E. McKenney
2014-02-20 17:01 ` Linus Torvalds
2014-02-20 18:12 ` Paul E. McKenney
2014-02-20 18:32 ` Linus Torvalds
2014-02-20 18:53 ` Torvald Riegel
2014-02-20 19:09 ` Linus Torvalds
2014-02-22 18:53 ` Torvald Riegel
2014-02-22 21:53 ` Linus Torvalds
2014-02-23 0:39 ` Paul E. McKenney
2014-02-23 3:50 ` Linus Torvalds
2014-02-23 9:22 ` Paul E. McKenney
2014-02-23 19:31 ` Linus Torvalds
2014-02-24 1:17 ` Paul E. McKenney
2014-02-24 1:35 ` Linus Torvalds
2014-02-24 5:00 ` Paul E. McKenney
2014-02-24 5:26 ` Linus Torvalds
2014-02-24 15:57 ` Linus Torvalds
2014-02-24 16:27 ` Richard Biener
2014-02-24 16:37 ` Linus Torvalds
2014-02-24 16:40 ` Linus Torvalds
2014-02-24 16:55 ` Michael Matz
2014-02-24 17:29 ` Paul E. McKenney
2014-02-24 17:57 ` Paul E. McKenney
2014-02-26 17:40 ` Torvald Riegel
2014-02-24 17:38 ` Linus Torvalds
2014-02-24 18:12 ` Paul E. McKenney
2014-02-26 17:34 ` Torvald Riegel
2014-02-24 17:21 ` Paul E. McKenney
2014-02-24 18:14 ` Linus Torvalds
2014-02-24 18:53 ` Paul E. McKenney
2014-02-24 19:54 ` Linus Torvalds
2014-02-24 22:37 ` Paul E. McKenney
2014-02-24 23:35 ` Linus Torvalds
2014-02-25 6:00 ` Paul E. McKenney
2014-02-26 1:47 ` Linus Torvalds
2014-02-26 5:12 ` Paul E. McKenney
2014-02-25 6:05 ` Linus Torvalds
2014-02-26 0:16 ` Paul E. McKenney
2014-02-26 3:32 ` Jeff Law
2014-02-26 5:23 ` Paul E. McKenney
2014-02-27 15:37 ` Torvald Riegel
2014-02-27 17:01 ` Linus Torvalds
2014-02-27 19:06 ` Paul E. McKenney
2014-02-27 19:47 ` Linus Torvalds
2014-02-27 20:53 ` Paul E. McKenney
2014-03-01 0:50 ` Paul E. McKenney
2014-03-01 10:06 ` Peter Sewell
2014-03-01 14:04 ` Paul E. McKenney
2014-03-02 10:05 ` Peter Sewell
2014-03-02 23:21 ` Paul E. McKenney
2014-03-02 23:44 ` Peter Sewell
2014-03-03 4:25 ` Paul E. McKenney
2014-03-03 20:44 ` Torvald Riegel
2014-03-04 22:11 ` Peter Sewell
2014-03-05 17:15 ` Torvald Riegel
2014-03-05 18:37 ` Peter Sewell
2014-03-03 19:08 ` Torvald Riegel
2014-03-03 19:20 ` Paul E. McKenney
2014-03-03 20:46 ` Torvald Riegel
2014-03-04 19:00 ` Paul E. McKenney
2014-03-04 21:35 ` Paul E. McKenney
2014-03-05 16:55 ` Torvald Riegel
2014-03-05 18:15 ` Paul E. McKenney
2014-03-07 18:33 ` Torvald Riegel
2014-03-07 19:11 ` Paul E. McKenney
2014-03-05 16:26 ` Torvald Riegel
2014-03-05 18:01 ` Paul E. McKenney
2014-03-07 17:46 ` Torvald Riegel
2014-03-07 19:02 ` Paul E. McKenney
2014-03-03 18:59 ` Torvald Riegel
2014-03-03 15:36 ` Torvald Riegel
2014-02-27 17:50 ` Paul E. McKenney
2014-02-27 19:22 ` Paul E. McKenney
2014-02-28 1:02 ` Paul E. McKenney
2014-03-03 19:29 ` Torvald Riegel
2014-03-03 19:01 ` Torvald Riegel
2014-02-20 18:56 ` Paul E. McKenney
2014-02-20 19:45 ` Linus Torvalds
2014-02-20 22:10 ` Paul E. McKenney
2014-02-20 22:52 ` Linus Torvalds
2014-02-21 18:35 ` Michael Matz
2014-02-21 19:13 ` Paul E. McKenney
2014-02-21 22:11 ` Joseph S. Myers
2014-02-21 22:37 ` Paul E. McKenney
2014-02-26 13:09 ` Torvald Riegel
2014-02-26 18:43 ` Joseph S. Myers
2014-02-27 0:53 ` Torvald Riegel
2014-02-24 13:55 ` Michael Matz
2014-02-24 17:40 ` Paul E. McKenney
2014-02-26 13:04 ` Torvald Riegel
2014-02-26 18:27 ` Paul E. McKenney
2014-02-20 18:44 ` Torvald Riegel
2014-02-20 18:56 ` Paul E. McKenney
2014-02-20 18:23 ` Torvald Riegel
[not found] ` <CAHWkzRQZ8+gOGMFNyTKjFNzpUv6d_J1G9KL0x_iCa=YCgvEojQ@mail.gmail.com>
2014-02-21 19:16 ` Linus Torvalds
2014-02-21 19:41 ` Linus Torvalds
2014-02-21 19:48 ` Peter Sewell
[not found] ` <CAHWkzRSO82jU-9dtTEjHaW2FeLcEqdZXxp5Q8cmVTTT9uhZQYw@mail.gmail.com>
2014-02-21 20:22 ` Linus Torvalds
[not found] ` <CAHWkzRRxqhH+DnuQHu9bM4ywGBen3oqtT8W4Xqt1CFAHy2WQRg@mail.gmail.com>
2014-02-21 19:24 ` Paul E. McKenney
2014-02-20 17:54 ` Torvald Riegel
2014-02-20 18:12 ` Paul E. McKenney [this message]
2014-02-20 17:49 ` Torvald Riegel
2014-02-20 18:25 ` Linus Torvalds
2014-02-20 19:02 ` Linus Torvalds
2014-02-20 19:06 ` Linus Torvalds
2014-02-20 17:26 ` Torvald Riegel
2014-02-20 18:18 ` Paul E. McKenney
2014-02-22 18:31 ` Torvald Riegel
2014-02-22 20:18 ` Paul E. McKenney
2014-02-20 17:16 ` Torvald Riegel
2014-02-20 17:35 ` Linus Torvalds
2014-02-20 18:12 ` Torvald Riegel
2014-02-20 18:26 ` Paul E. McKenney
2014-02-18 5:02 ` Paul E. McKenney
2014-02-18 15:56 ` Torvald Riegel
2014-02-18 16:51 ` Paul E. McKenney
2014-02-17 20:23 ` Paul E. McKenney
2014-02-17 21:06 ` Torvald Riegel
2014-02-15 17:30 ` Torvald Riegel
2014-02-15 19:16 ` Linus Torvalds
2014-02-17 22:10 ` Torvald Riegel
2014-02-17 22:32 ` Linus Torvalds
2014-02-17 23:17 ` Torvald Riegel
2014-02-18 0:09 ` Linus Torvalds
2014-02-18 16:39 ` Torvald Riegel
2014-02-10 11:48 ` Peter Zijlstra
2014-02-10 11:49 ` Will Deacon
2014-02-10 12:05 ` Peter Zijlstra
2014-02-10 15:06 ` Paul E. McKenney
2014-02-10 16:23 ` Will Deacon
2014-02-07 18:45 ` Torvald Riegel
2014-02-10 0:07 ` Torvald Riegel
2014-02-10 3:52 ` Paul E. McKenney
2014-02-12 5:13 ` Torvald Riegel
2014-02-12 18:26 ` Paul E. McKenney
2014-02-06 21:09 ` Torvald Riegel
2014-02-06 21:55 ` Paul E. McKenney
2014-02-06 22:58 ` Torvald Riegel
2014-02-07 4:06 ` Paul E. McKenney
2014-02-07 9:13 ` Torvald Riegel
2014-02-07 16:44 ` Paul E. McKenney
2014-02-06 22:13 ` Joseph S. Myers
2014-02-06 23:25 ` Torvald Riegel
2014-02-06 23:33 ` Joseph S. Myers
2014-02-07 12:01 ` Will Deacon
2014-02-07 16:48 ` Paul E. McKenney
2014-02-18 12:12 Peter Sewell
2014-02-18 12:54 ` Peter Zijlstra
2014-02-18 16:09 ` Peter Sewell
2014-02-18 14:57 ` Paul E. McKenney
2014-02-18 15:17 ` Mark Batty
2014-02-18 17:17 ` Paul E. McKenney
2014-02-18 15:33 ` Peter Sewell
2014-02-18 16:47 ` Paul E. McKenney
2014-02-18 17:38 ` Linus Torvalds
2014-02-18 18:21 ` Peter Sewell
2014-02-18 18:49 ` Linus Torvalds
2014-02-18 19:47 ` Paul E. McKenney
2014-02-18 20:46 ` Torvald Riegel
2014-02-18 20:43 ` Torvald Riegel
2014-02-18 21:30 ` Paul E. McKenney
2014-02-18 23:48 ` Peter Sewell
2014-02-19 9:46 ` Torvald Riegel
2014-02-26 3:06 George Spelvin
2014-02-26 5:22 ` Paul E. McKenney
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