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Date: Wed, 6 Dec 2000 02:17:45 -0800 (PST)
From: mjmac@pineview.net
Sender: nobody@FreeBSD.org
To: freebsd-gnats-submit@FreeBSD.org
Subject: Addition / Alteration to Handbook/FAQ
X-Send-Pr-Version: www-1.0

>Number:         23322
>Category:       misc
>Synopsis:       Addition / Alteration to Handbook/FAQ
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Wed Dec 06 02:20:00 PST 2000
>Closed-Date:    Thu May 31 19:49:20 PDT 2001
>Last-Modified:  Thu May 31 19:49:45 PDT 2001
>Originator:     Malcolm McGrath
>Release:        3.3
>Organization:
>Environment:
not applicable
>Description:
Could you please add in the FAQ that you will need to recompile the kernel
somewhere in the section of the FAQ below.

I assumed wrongly that this option was like kernel boot time option and went
around half arsed looking for it. :).

Thanks for reading this email.

Malcolm McGrath
(Yes i am a newbie.)

<QUOTE FROM FAQ>
>How-To-Repeat:
n/a
>Fix:
Include in the FAQ at point 3.11 (RE: MAXMEM) that a kernel rebuild is nessesary and point ppl on how to do this.

>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->closed 
State-Changed-By: dd 
State-Changed-When: Thu May 31 19:49:20 PDT 2001 
State-Changed-Why:  
If you modify the kernel config file you have to recompile the kernel. 
Assuming you've read the docuemntation on compiling a kernel, this should be 
rather obvious. 

http://www.FreeBSD.org/cgi/query-pr.cgi?pr=23322 
>Unformatted:
 >3.11. I have 128 MB of RAM but the system only uses 64 MB.
 
 >Due to the manner in which FreeBSD gets the memory size from the BIOS, it
 >can only detect 16 bits worth of Kbytes in size (65535 Kbytes = 64MB) (or
 >less... some BIOSes peg the memory size to 16M). If you have more than
 >64MB, FreeBSD will attempt to detect it; however, the attempt may fail.
 >
 >To work around this problem, you need to use the kernel option specified
 >below. There is a way to get complete memory information from the BIOS, but
 >we don't have room in the bootblocks to do it. Someday when lack of room in
 >the bootblocks is fixed, we'll use the extended BIOS functions to get the
 >full memory information...but for now we're stuck with the kernel option.
 >
 >options "MAXMEM=n"
 >
 >Where n is your memory in Kilobytes. For a 128 MB machine, you'd want to
 >use 131072.
 </QUOTE>
 
 
 
