Date: Mon, 9 Feb 1998 12:09:52 +0100 (CET) From: Andrzej Bialecki <abial@nask.pl> To: Mike Smith <mike@smith.net.au> Cc: Andrzej Bialecki <abial@nask.pl>, Terry Lambert <tlambert@primenet.com>, freebsd-current@FreeBSD.ORG, jkh@FreeBSD.ORG Subject: Re: Custom init(8) (and some ideas) Message-ID: <Pine.NEB.3.95.980209120004.16915A-100000@korin.warman.org.pl> In-Reply-To: <199802070332.TAA03469@dingo.cdrom.com>
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On Fri, 6 Feb 1998, Mike Smith wrote:
> > A bit of background, if you're interested: I'm working on the next version
> > of PicoBSD, and after some shuffling with the layout and adding new
> > features I found that I can no longer fit into 8MB RAM... I.e. it fits,
> > but I can't start enough processes to make a dialup connection.
>
> What does the process listing look like? (use ddb and the 'ps' command
> rather than try to squeeze 'ps' into the crunch image).
I didn't have ddb in kernel - I thought it would take more space than
mount_procfs and ls-like proggy (which I include anyway). But I'll try
this. I have also sysctl(8) on the floppy, but I noticed that the most
interesting thing for me (i.e. vmmeter) is unimplemented (I already sent
PR on this, because this is actually vmtotal, not vmmeter).
> Have you shrunk the kernel as much as possible?
Yes. :-)) I even fiddled with NBUF and NMBCLUSTERS to save on buffer
space. maxusers is 1, so that the various system tables become minimal.
> For non-gzip binaries, execution starts by mmapping the entire text
> section, and jumping to it. Nothing is "loaded" in any case.
>
> What you're suggesting really is "execute-in-place", which is quite a
> tough thing to implement.
I suppose that's what I was thinking about :-). The whole issue is a bit
beyond my knowledge, but I'm learning...
Andrzej Bialecki
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abial@warman.org.pl | if(halt_per_mth > 0) { fetch("http://www.freebsd.org") }
Research & Academic | "Be open-minded, but don't let your brains to fall out."
Network in Poland | All of the above (and more) is just my personal opinion.
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