From: Dave Jones <davej@codemonkey.org.uk>
To: Duncan Sands <baldrick@wanadoo.fr>
Cc: "Martin J. Bligh" <mbligh@aracnet.com>,
Andrew Morton <akpm@digeo.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: BUGed to death
Date: Mon, 14 Apr 2003 22:02:16 +0100 [thread overview]
Message-ID: <20030414210211.GB7831@suse.de> (raw)
In-Reply-To: <200304142240.41999.baldrick@wanadoo.fr>
On Mon, Apr 14, 2003 at 10:40:41PM +0200, Duncan Sands wrote:
> You would think that the compiler would consider a branch leading to
> ud2 (i.e. BUG()) to be "unlikely", but it doesn't seem to. Maybe some
> improvement can be made there.
BUG_ON is already marked unlikely.
See include/linux/kernel.h
The costs here are doing the actual checks, nothing to do with
the branch prediction.
Dave
next prev parent reply other threads:[~2003-04-14 20:50 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-14 20:19 BUGed to death Martin J. Bligh
2003-04-14 20:40 ` Duncan Sands
2003-04-14 21:02 ` Dave Jones [this message]
2003-04-14 21:10 ` Duncan Sands
2003-04-14 21:17 ` Dave Jones
2003-04-15 11:57 ` Duncan Sands
2003-04-15 12:05 ` Dave Jones
2003-04-15 14:39 ` Martin J. Bligh
2003-04-23 15:08 ` Duncan Sands
2003-04-14 21:00 ` Dave Jones
2003-04-14 20:55 ` Martin J. Bligh
2003-04-14 21:08 ` Dave Jones
2003-04-14 21:50 ` Andrew Morton
2003-04-14 21:55 ` Dave Jones
2003-04-15 0:23 ` H. Peter Anvin
2003-04-15 12:01 ` Duncan Sands
2003-04-15 12:31 ` Jens Axboe
2003-04-15 12:36 ` Dave Jones
2003-04-15 12:40 ` Jens Axboe
2003-04-15 12:49 ` Sean Neakums
2003-04-15 12:52 ` Sean Neakums
2003-04-15 13:01 ` Roman Zippel
2003-04-15 13:17 ` Jens Axboe
2003-04-15 13:55 ` Duncan Sands
2003-04-15 14:22 ` Jens Axboe
2003-04-15 14:35 ` Martin J. Bligh
2003-04-15 14:39 ` Duncan Sands
2003-04-15 14:45 ` Martin J. Bligh
2003-04-15 14:58 ` Duncan Sands
-- strict thread matches above, loose matches on Subject: below --
2003-04-15 14:30 rwhron
2003-04-15 15:57 ` Dave Jones
2003-04-15 16:11 ` Nick Piggin
2003-04-15 16:42 ` Michael Buesch
2003-04-15 16:45 ` Dave Jones
2003-04-15 18:33 Chuck Ebbert
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