Subject: Re: unable to boot with 256MB of RAM
To: Cliff Crawford <cjc26@cornell.edu>
From: Curt Sampson <cjs@cynic.net>
List: port-sparc
Date: 11/19/1999 01:39:07
On Mon, 15 Nov 1999, Cliff Crawford wrote:

> A similar problem occurs in the macppc port.  Try building a new kernel
> with the line:
> 
> options BUFPAGES=800

The problem is lack of kernel VM space to map the buffers. Doing
that would give you not a heck of a lot of buffer space, which is
really a waste on a machine with that much memory. The solution is
to set MAXBSIZE smaller so that you can map in more buffers. On my 512 MB
SS20 I use

options         MAXBSIZE=32768
options         NBUF=5120
options         BUFPAGES=14000

If you want to bring your MAXBSIZE down to 8192 (which should be
fine, unless you're mounting DOS disks with large cluster sizes or
something like that--unlikely on a Sparc) you can easily get a
couple of hundred MB of buffer cache.

cjs
--
Curt Sampson  <cjs@cynic.net>   917 532 4208   De gustibus, aut bene aut nihil.
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