Date: Tue, 12 Feb 2002 17:09:54 +0000 (GMT) From: Mike Silbersack <silby@silby.com> To: David Malone <dwmalone@maths.tcd.ie> Cc: cvs-committers@FreeBSD.org, <cvs-all@FreeBSD.org> Subject: Re: cvs commit: src/sys/conf options.i386 options.pc98 src/sys/i386/conf NOTES src/sys/i386/i386 initcpu.c Message-ID: <20020212170729.P2904-100000@patrocles.silby.com> In-Reply-To: <200202122210.aa14625@salmon.maths.tcd.ie>
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On Tue, 12 Feb 2002, David Malone wrote:
> > Could you make this a loader tunable? Recompiling a kernel just for a few
> > lines of code is a huge pain.
>
> Since it is a hack for borked BIOS code, I think having it as an
> option is probably fine (just like all the other magic CPU options).
> Adding the option to GENERIC and reconfiguring only results in the
> recompilation of 3/4 files.
>
> If people feel that it would really be more useful as a tunable,
> then I can figure out how that is done.
>
> David.
As easy as recompiling a kernel is, just setting a variable in loader.conf
and rebooting is a lot easier.
The code's simple:
int athlonenablesse;
TUNABLE_INT_FETCH("workaround.broken.athlon.bios.that.didnt.set.sse",
&athlonenablesse);
And then trigger based off that variable. Its value should not change if
the tunable isn't found. You may also wish to consider a shorter tunable
name. :)
Mike "Silby" Silbersack
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