From: Peter Zijlstra <peterz@infradead.org>
To: Marek Polacek <polacek@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>,
Linus Torvalds <torvalds@linux-foundation.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Martin Jambor <mjambor@suse.cz>, Petr Mladek <pmladek@suse.cz>,
linux-kernel@vger.kernel.org, gcc@gcc.gnu.org
Subject: Re: [PATCH] tell gcc optimizer to never introduce new data races
Date: Tue, 10 Jun 2014 17:13:29 +0200 [thread overview]
Message-ID: <20140610151329.GL6758@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20140610150455.GC7335@redhat.com>
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On Tue, Jun 10, 2014 at 05:04:55PM +0200, Marek Polacek wrote:
> On Tue, Jun 10, 2014 at 04:53:27PM +0200, Peter Zijlstra wrote:
> > On Tue, Jun 10, 2014 at 03:23:36PM +0200, Jiri Kosina wrote:
> > > +# Tell gcc to never replace conditional load with a non-conditional one
> > > +KBUILD_CFLAGS += $(call cc-option,--param allow-store-data-races=0)
> > > +
> >
> > Why do we not want: -fmemory-model=safe? And should we not at the very
> > least also disable packed-store-data-races?
>
> Note that the option does not exist, even though it is mentioned in the
> documentation.
Urgh.. ok. Any word on the packed-store-data thing?
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next prev parent reply other threads:[~2014-06-10 15:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-10 13:23 [PATCH] tell gcc optimizer to never introduce new data races Jiri Kosina
2014-06-10 14:53 ` Peter Zijlstra
2014-06-10 15:04 ` Marek Polacek
2014-06-10 15:13 ` Peter Zijlstra [this message]
2014-06-10 15:17 ` Jakub Jelinek
2014-06-10 17:46 ` Linus Torvalds
2014-06-10 18:04 ` Steven Noonan
2014-06-10 18:54 ` Richard Biener
2014-06-10 18:10 ` Jiri Kosina
2014-06-16 10:29 ` Dan Carpenter
2014-06-16 10:52 ` Andreas Schwab
2014-06-16 11:20 ` Jiri Kosina
2014-06-16 14:37 ` Mark Brown
2014-06-17 7:58 ` Jiri Kosina
2014-08-20 23:27 ` Jiri Kosina
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