Date: Sat, 13 Mar 2004 07:49:34 +1100 From: John Birrell <jb@cimlogic.com.au> To: "M. Warner Losh" <imp@bsdimp.com> Cc: current@freebsd.org Subject: Re: "nanobsd" prototype Message-ID: <20040313074934.Z234@freebsd3.cimlogic.com.au> In-Reply-To: <20040311.154358.112813557.imp@bsdimp.com>; from imp@bsdimp.com on Thu, Mar 11, 2004 at 03:43:58PM -0700 References: <20040310113611.GA1241@abigail.blackend.org> <40928.1078919852@critter.freebsd.dk> <20040311.154358.112813557.imp@bsdimp.com>
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On Thu, Mar 11, 2004 at 03:43:58PM -0700, M. Warner Losh wrote: > In message: <40928.1078919852@critter.freebsd.dk> > "Poul-Henning Kamp" <phk@phk.freebsd.dk> writes: > : Not long ago I manually cut down a -current to run in 32MB but I > : admit that there were a fair bit of stuff missing :-) > > FreeBSD 4.5 can be cut down to about 8MB or so, but 5 likely can't go > below about 12-15MB without a lot of pain. Just a note for the benefit of others interested in this topic... Both 4.X and 5 can be cut down more than that for highly embedded systems which aren't intended to offer Unix functionality (like sh, login, etc) and are dedicated to some task. I have systems that fit in 1MB of flash. These contain only a kernel and a (replacement program for) init(8). The kernel config file for these is typically less than 10 lines long. I guess that qualifies as "more than a fair bit of stuff missing". Like most of it. 8-) -- John Birrell
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