Date: Mon, 1 Sep 2003 03:02:36 -0700
From: "David S. Miller" <davem@redhat.com>
To: Jamie Lokier <jamie@shareable.org>
Cc: mfedyk@matchmail.com, lm@bitmover.com, linux-kernel@vger.kernel.org
Subject: Re: x86, ARM, PARISC, PPC, MIPS and Sparc folks please run this
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On Mon, 1 Sep 2003 11:04:58 +0100
Jamie Lokier <jamie@shareable.org> wrote:

> Of course if you make mmap() return EINVAL then it cannot possible fail :)

Right :-)

> > I'd suggest instead to hardcode the SHMLBA stuff into your sources.
> 
> How?  SHMLBA is a run time value on the Sparc; I have no idea how
> to work it out.

You're talking about 32-bit sparc, on sparc64 it's a constant
16K.

For sparc 32-bit, just use 4MB, that's the largest possible value.

And you have to check this with uname() results, not with ifdefs
as 32-bit Sparc binaries run on sparc64 systems just fine.

I also would not object at all to a kernel patch that exported the
SHMLBA value via some sysctl value.
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