Re: i386/loader compiled with NOFORTH

On Fri, Apr 25, 2003 at 12:07:35PM -0400, John Baldwin wrote:
> 
> On 25-Apr-2003 Ruslan Ermilov wrote:
> > On Thu, Apr 24, 2003 at 05:45:15PM -0400, John Baldwin wrote:
> >> 
> >> On 24-Apr-2003 Ruslan Ermilov wrote:
> >> > On Thu, Apr 24, 2003 at 02:21:17PM -0400, John Baldwin wrote:
> >> >> 
> >> >> On 24-Apr-2003 Ruslan Ermilov wrote:
> >> >> > On 5.x, loader(8) compiled with -DNOFORTH, results in
> >> >> > a system without a console.  This does not affect the
> >> >> > RELENG_4.
> >> >> > 
> >> >> > Can someone who knows this code please look into it?
> >> >> 
> >> >> No kernel console or no loader console?  The usual problem with
> >> >> no kernel console on 5.x is lack of device.hints.
> >> >> 
> >> > No kernel console.  The device.hints, it's there under /boot;
> >> > I only reinstalled loader(8) with -DNOFORTH, and this gave me
> >> > "no console" behavior.  Can you try it locally?
> >> 
> >> Since device.hints is read in by Forth code, I wouldn't be
> >> surprised if it didn't work.  When you break into the 10
> >> second countdown, do you have any hints set in the loader
> >> environment?
> >> 
> > Yes, figured this out by myself already.  I've ended up
> > uncommenting the "hints" line in GENERIC config, everything
> > is OK now, and bzip2(1) also works, modulo the memory
> > restrictions -- only level 1 bzipping works that requires
> > ~250K of memory.
> > 
> > John, is there a way to fix btx/loader/whatever so that
> > heap memory is not limited to 640K?
> 
> Not really.  At least, not easily.  We load the kernel up above 1mb,
> but we don't know how much memory lives up above 1mb and we assume
> that there is enough for the kernel and that's it.
> 
I was referring to this message from loader(8):

BIOS 639kB/129856kB available memory

So I thought that the memory allocation in i386/loader is
limited to real mode's 640KB, no?

Also, IIRC, the installation requirement was 8MB or so,
and the runtime requirement was 4MB (these are 4.x numbers
from my memory), so we can safely assume that we have at
least 4MB of memory?  Now that I look at it, I see that
GENERIC kernel in 5.0 is 4.82MB, and so we can probably
always assume that we have 8MB of memory.


Cheers,
-- 
Ruslan Ermilov		Sysadmin and DBA,
ru_at_sunbay.com		Sunbay Software AG,
ru_at_FreeBSD.org		FreeBSD committer,
+380.652.512.251	Simferopol, Ukraine

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