From owner-freebsd-hackers  Sat Jun 22 16:52:38 2002
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Date: Sat, 22 Jun 2002 16:48:15 -0700 (PDT)
From: Patrick Thomas <root@utility.clubscholarship.com>
To: Terry Lambert <tlambert2@mindspring.com>
Cc: Nielsen <nielsen@memberwebs.com>, <hackers@freebsd.org>
Subject: Re: (jail) problem and a (possible) solution ?
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I think I'll just decrease my swap size from 2 gigs to 1 gig - is that a
reasonable alternative that provides the same benefit and possible
solution to this problem ?

...since bsically 0 swap has ever been used on the machine anyway...

--PT

On Sat, 22 Jun 2002, Terry Lambert wrote:

> Patrick Thomas wrote:
> > How do you increase KVA space these days ?  I see that in earlier releases
> > you had to edit /sys/conf/ldscript.i386 and /sys/i386/include/pmap.h and
> > do all sorts of crazy stuff.
> >
> > What is the procedure in 4.5-RELEASE (please say "just change
> > KVA_PAGES=260 to KVA_PAGES=512)
> >
> > That's what you want me to do, right ?  Is that all - can it be done just
> > by changing that one value in my kernel config ?
>
> It's what I want you to do.
>
> For 4.5, you have to hack ldscript.i386 and pmap.h.  I've posted
> on how to do this before (should be in the archives).
>
> The pages are all going to be off-by-one from your calculations,
> for the recursive page mapping, or off-by-two if your kernel is an
> SMP kernel, for the per CPU page, so remember that, or you will
> end up with a kernel that simply doesn't boot.
>
> The easiest way is to look at the numbers in pmap.h, and figure
> out how they relate to 0xc0000000 (remember to OR in 0x00100000
> after your math, to count the kernel loading at 1M).
>
> -- Terry
>


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