From: Eric Dumazet <eric.dumazet@gmail.com>
To: Jan Engelhardt <jengelh@medozas.de>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Josh Triplett <josh@joshtriplett.org>,
laijs@cn.fujitsu.com, manfred@colorfullife.com,
dhowells@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] rcu: avoid checking for constant
Date: Thu, 12 Jan 2012 17:14:35 +0100 [thread overview]
Message-ID: <1326384875.2950.25.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> (raw)
In-Reply-To: <alpine.LNX.2.01.1201121657001.24875@frira.zrqbmnf.qr>
Le jeudi 12 janvier 2012 à 17:08 +0100, Jan Engelhardt a écrit :
> Maybe, maybe naah. The kernel relying on gcc's -O2 mode to do constant
> value analysis through and into inline functions does not sound too
> great. The compiler could change on the next moonphase. In fact, one
> can't use clang -O2 because of this. With my patch, one can again use
> clang -O2 [with respect to kfree_rcu].
Unless whole kernel can be compiled with -O0, its really some noise.
next prev parent reply other threads:[~2012-01-12 16:14 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-12 5:11 Jan Engelhardt
2012-01-12 7:14 ` Josh Triplett
2012-01-12 9:25 ` Jan Engelhardt
2012-01-12 9:52 ` Josh Triplett
2012-01-12 10:34 ` Jan Engelhardt
2012-01-12 10:54 ` Eric Dumazet
2012-01-12 10:57 ` Jan Engelhardt
2012-01-12 15:29 ` Paul E. McKenney
2012-01-12 16:08 ` Jan Engelhardt
2012-01-12 16:14 ` Eric Dumazet [this message]
2012-01-12 11:58 ` Josh Triplett
2012-01-12 15:38 ` Jan Engelhardt
2012-01-12 18:41 ` Josh Triplett
2012-04-19 18:57 ` Paul E. McKenney
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