linux-kernel - Re: i686 quirk for AMD Geode

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]

Date:	Sat, 3 Oct 2009 19:25:24 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Matteo Croce <technoboy85@...il.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Subject: Re: i686 quirk for AMD Geode

On Sun, 4 Oct 2009 00:04:03 +0200
Matteo Croce <technoboy85@...il.com> wrote:

> >
> > the number that is exposed in /proc/cpuinfo does not control
> > if cmov is used... so the patch and the benchmark are totally
> > unrelated.
> >
> 
> yes cmov and i686 are unrelated but some distros (Debian & co.)
> compiles libraries for two archs:
> i486 and i686-cmov so only i686 machines does benefit from cmov.
> This is why I cared about having an i686 aware userspace but it seems
> that for a missing instruction I can't do that

I'm surprised that "i686" in debian depends on the family flag
in /proc/cpuinfo.. but hey.. weirder things have been done.


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/