From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: tim.c.chen@linux.intel.com, Andrew Morton <akpm@osdl.org>,
herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org,
leonid.i.ananiev@intel.com
Subject: Re: [PATCH] Fix WARN_ON / WARN_ON_ONCE regression
Date: Tue, 10 Oct 2006 13:03:56 -0700 [thread overview]
Message-ID: <452BFCAC.5040802@goop.org> (raw)
In-Reply-To: <1160485474.22525.6.camel@localhost.localdomain>
Steven Rostedt wrote:
> Holy crap! I wonder where else in the kernel gcc is doing this. (of
> course I'm using gcc4 so I don't know). Is there another gcc attribute
> to actually tell gcc that a variable is really mostly read only (besides
> placing it in a mostly read only elf section)?
>
That would be nice, but I don't know of one (apart from "volatile",
which has its own downsides). Once could imagine an annotation which
makes gcc consider writes to the variable relatively expensive, so that
it avoids generating unnecessary/excessive writes.
J
next prev parent reply other threads:[~2006-10-10 20:03 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-03 23:04 [PATCH] Fix WARN_ON / WARN_ON_ONCE regression Tim Chen
2006-10-03 23:19 ` Tim Chen
2006-10-04 0:06 ` Jeremy Fitzhardinge
2006-10-03 23:47 ` Tim Chen
2006-10-04 4:39 ` Jeremy Fitzhardinge
2006-10-04 13:21 ` Tim Chen
2006-10-04 16:30 ` Andrew Morton
2006-10-04 16:22 ` Tim Chen
2006-10-04 17:34 ` Andrew Morton
2006-10-04 20:43 ` Tim Chen
2006-10-10 1:09 ` Tim Chen
2006-10-10 13:04 ` Steven Rostedt
2006-10-10 15:41 ` Tim Chen
2006-10-10 20:03 ` Jeremy Fitzhardinge [this message]
2006-10-04 0:07 ` Andrew Morton
2006-10-03 23:42 ` Tim Chen
2006-10-04 0:09 ` Tim Chen
2006-10-04 1:14 ` Andrew Morton
2006-10-04 1:47 ` Nick Piggin
2006-10-04 3:24 ` Andrew James Wade
2006-10-04 3:32 ` Andrew Morton
2006-10-04 16:47 ` Andrew James Wade
2006-10-04 22:06 ` Andrew Morton
2006-10-05 8:13 ` Andrew James Wade
2006-10-05 8:36 ` Andrew Morton
2006-10-05 21:31 ` Andrew James Wade
2006-10-05 21:01 ` Tim Chen
-- strict thread matches above, loose matches on Subject: below --
2006-10-04 16:57 Ananiev, Leonid I
2006-10-04 17:28 ` Andrew Morton
2006-10-08 0:28 ` Steven Rostedt
2006-10-08 0:39 ` Jeremy Fitzhardinge
2006-10-04 21:55 Ananiev, Leonid I
2006-10-05 21:37 ` Andrew Morton
2006-10-05 21:43 ` Jeremy Fitzhardinge
2006-10-05 21:52 ` Andrew Morton
2006-10-05 22:02 ` Herbert Xu
2006-10-05 22:40 ` Jeremy Fitzhardinge
2006-10-05 21:51 ` Tim Chen
2006-10-06 16:11 ` Andrew James Wade
2006-10-06 4:06 Ananiev, Leonid I
2006-10-10 21:05 Ananiev, Leonid I
2006-10-10 21:17 ` Steven Rostedt
2006-10-10 21:41 ` Roland Dreier
2006-10-10 22:59 ` Jeremy Fitzhardinge
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