From: Bodo Eggert <7eggert@elstempel.de>
To: Jes Sorensen <jes@sgi.com>, Andreas Schwab <schwab@suse.de>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Jeff Garzik <jeff@garzik.org>,
ricknu-0@student.ltu.se, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@osdl.org>
Subject: Re: [RFC][PATCH] A generic boolean
Date: Fri, 04 Aug 2006 22:51:15 +0200 [thread overview]
Message-ID: <E1G96ds-0000ht-HT@be1.lrz> (raw)
In-Reply-To: 6GaIN-4dw-25@gated-at.bofh.it
Jes Sorensen <jes@sgi.com> wrote:
> Andreas Schwab wrote:
>> Try determining the alignment of u64 on i386. You will be surprised.
>
> If thats the case, then thats really scary :-( I'd claim it's a bug and
> I am willing to be that iptables isn't the only place that is affected
> or will be in the future.
It's not a bug, since 64 bit integers require only 4-byte-alignment if
addressed by the CPU/FPU. You may benefit from cacheline effects if you
align to 64 bits, but not on i[34]86 (and those define the ABI).
If you want 64-bit-alignment, you can use -malign-double.
--
Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF
verbreiteten Lügen zu sabotieren.
http://david.woodhou.se/why-not-spf.html
next parent reply other threads:[~2006-08-04 20:57 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
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[not found] ` <6Gaz6-40T-21@gated-at.bofh.it>
[not found] ` <6GaIN-4dw-25@gated-at.bofh.it>
2006-08-04 20:51 ` Bodo Eggert [this message]
2006-07-19 20:38 [RFC][PATCH] A generic boolean ricknu-0
2006-07-19 21:04 ` Jeff Garzik
2006-07-19 23:17 ` ricknu-0
2006-07-20 0:13 ` Jeff Garzik
2006-07-20 3:04 ` Vadim Lobanov
2006-07-20 3:53 ` Shorty Porty
2006-07-20 3:59 ` Dmitry Torokhov
2006-07-20 8:07 ` Jan Engelhardt
2006-08-04 14:03 ` Jes Sorensen
2006-08-04 14:42 ` Alan Cox
2006-08-04 14:35 ` Jes Sorensen
2006-08-04 15:51 ` Alan Cox
2006-08-04 15:58 ` Jes Sorensen
2006-08-04 16:00 ` Andreas Schwab
2006-08-04 16:08 ` Jes Sorensen
2006-08-04 16:16 ` Andreas Schwab
2006-08-04 16:26 ` Jes Sorensen
2006-08-04 16:57 ` Andreas Schwab
2006-08-04 18:47 ` Jes Sorensen
2006-08-04 18:51 ` H. Peter Anvin
2006-08-04 18:58 ` Jes Sorensen
2006-08-04 19:04 ` H. Peter Anvin
2006-08-06 9:25 ` Jan Engelhardt
2006-08-06 9:48 ` Andreas Schwab
2006-08-06 9:31 ` Jan Engelhardt
2006-08-06 15:31 ` Jes Sorensen
2006-08-04 16:30 ` Alan Cox
2006-08-04 16:20 ` Jes Sorensen
2006-07-19 21:20 ` Alexey Dobriyan
2006-07-19 22:47 ` ricknu-0
2006-07-19 23:52 ` Peter Williams
2006-07-20 0:08 ` ricknu-0
2006-07-20 8:09 ` Jan Engelhardt
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