Date: Mon, 4 Dec 2006 16:53:11 -0800 From: "Kip Macy" <kip.macy@gmail.com> To: "Marius Strobl" <marius@alchemy.franken.de>, "Kip Macy" <kmacy@freebsd.org>, src-committers@freebsd.org, cvs-src@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/conf kern.mk Message-ID: <b1fa29170612041653w3af39807x73e3bf8b97fa77d8@mail.gmail.com> In-Reply-To: <20061204230453.GD24301@alchemy.franken.de> References: <200611262316.kAQNGk3e071929@repoman.freebsd.org> <20061204212233.GA38633@alchemy.franken.de> <b1fa29170612041433m2c93100dmdfe8fdc08f685f60@mail.gmail.com> <20061204230453.GD24301@alchemy.franken.de>
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One would think so, but it didn't work for me on my 16GB sun4v box.
-Kip
On 12/4/06, Marius Strobl <marius@alchemy.franken.de> wrote:
> On Mon, Dec 04, 2006 at 02:33:24PM -0800, Kip Macy wrote:
> > I haven't talked to Sam, I had forgotten about that - this will only break
> > ABI compat on -HEAD. "-mcmodel=medlow" was almost certainly never needed,
> > its an optimization that reduces then number of instructions needed to
> load
> > a constant by assuming that the constant is <=32 bits. Loading a 32 bit
> > constant is 3 instructions, loading a 64-bit constant is 7 :-(.
> Considering
> > the other performance issues that sparc64 has, its safe to say that the
> > extra overhead is in the noise.
> >
> > -Kip
>
> I just remember commits like sys/conf/Makefile.sparc64 rev.
> 1.14 and some others which claim that model medlow is/was
> essential, unfortunately neither did bother to explain as to
> why that's supposed to be so...
> I suppose that using medany also fixes executing modules
> on sparc64/sun4u machines with >4GB RAM, correct?
>
> Marius
>
> >
> >
> > On 12/4/06, Marius Strobl <marius@alchemy.franken.de> wrote:
> > >
> > >On Sun, Nov 26, 2006 at 11:16:46PM +0000, Kip Macy wrote:
> > >> kmacy 2006-11-26 23:16:46 UTC
> > >>
> > >> FreeBSD src repository
> > >>
> > >> Modified files:
> > >> sys/conf kern.mk
> > >> Log:
> > >> Fix module loading for sparc on machines with greater than 1GB of RAM
> > >>
> > >
> > >Hi Kip,
> > >
> > >could you please update the comment above the line you changed
> > >as appropriate?
> > >Do you have an idea why medlow no longer is crucial in order
> > >to get a working kernel?
> > >Did you talk to sam@ regarding providing a new sparc64 HAL BLOB
> > >(according to sys/contrib/dev/ath/public/sparc64-be-elf.inc it
> > >was built with -mcmodel=medlow, too)?
> > >
> > >Marius
> > >
> > >
>
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