linux-kernel - Re: [PATCH] tell gcc optimizer to never introduce new data races

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: <20140610145327.GJ6758@twins.programming.kicks-ass.net>
Date:	Tue, 10 Jun 2014 16:53:27 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Martin Jambor <mjambor@...e.cz>, Petr Mladek <pmladek@...e.cz>,
	linux-kernel@...r.kernel.org, gcc@....gnu.org
Subject: Re: [PATCH] tell gcc optimizer to never introduce new data races

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?

Content of type "application/pgp-signature" skipped