linux-kernel - Re: Possibility of adding -march=native to x86

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]

Message-ID: <20071025132051.20cfd376@laptopd505.fenrus.org>
Date:	Thu, 25 Oct 2007 13:20:51 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Adrian Bunk <bunk@...nel.org>
Cc:	Michael Lothian <mike@...eburn.co.uk>, linux-kernel@...r.kernel.org
Subject: Re: Possibility of adding -march=native to x86

On Thu, 25 Oct 2007 22:20:31 +0200
Adrian Bunk <bunk@...nel.org> wrote:

> On Thu, Oct 25, 2007 at 09:12:45PM +0100, Michael Lothian wrote:
> > > The MPENTIUM4 option does not only set -march=pentium4, it also
> > > enables several other options in arch/i386/Kconfig.cpu resulting
> > > in better performance.
> > 
> > How about an autodetect to set the right options here too using
> > cpuid?
> > 
> > With a warning of course that the code produced will be specifically
> > for the native cpu that it's compiled on.
> 
> If you don't know or can figure out yourself the CPU you have, you'd 
> better not compile your own kernel...
> 
... or if there is more than just one CPU type, you pick generic.


-- 
If you want to reach me at my work email, use arjan@...ux.intel.com
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/