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Date: Fri, 30 May 2008 00:46:56 -0700
From: Jeremy Chadwick <koitsu@FreeBSD.org>
To: Dinesh Nair <dinesh@alphaque.com>
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Cc: freebsd-hackers@FreeBSD.org, Adrian Thearle <adrian@thearle.com.au>
Subject: Re: Maximum memory allocation per process
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On Fri, May 30, 2008 at 01:58:14PM +0800, Dinesh Nair wrote:
> On Thu, 22 May 2008 06:38:19 -0700, Jeremy Chadwick wrote:
> > You need to modify some kernel settings via /boot/loader.conf and
> > reboot.  Here's what we use on our production RELENG_6 and RELENG_7
> > boxes:
> > 
> > # Increase maximum allocatable memory on a process to 2GB.
> > # (We don't choose 3GB (our max RAM) since that would
> > # exhaust all memory, and result in a kernel panic.)
> > # Set default memory size as 768MB.
> > # Maximum stack size is 256MB.
> > #
> > kern.maxdsiz="2048M"
> > kern.dfldsiz="768M"
> > kern.maxssiz="256MB"
> 
> for those of us who're booting off a stripped down freebsd and are not
> using the 4th routines, are the above to be set before 'load /kernel' or
> after 'load /kernel' ?
> 
> currently, loader.rc contains,
> 
> --- cut here ---
> set console=comconsole
> set hw.ata.atapi_dma="0"
> set hw.ata.ata_dma="0"
> set hw.ata.wc="0"
> load /kernel
> load -t mfs_root /mfsroot
> boot
> --- cut here ---

I believe these would either need to be set *before* loading the kernel,
or, possibly it doesn't matter at all (they might be passed to the
kernel itself during "boot").

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |