Date: Tue, 1 Mar 2005 15:29:15 -0500 From: John Baldwin <jhb@FreeBSD.org> To: "M. Warner Losh" <imp@bsdimp.com> Cc: bmah@FreeBSD.org Subject: Re: cvs commit: src/release/doc/en_US.ISO8859-1/installation/common install.sgml Message-ID: <200503011529.15251.jhb@FreeBSD.org> In-Reply-To: <20050301.094356.112814615.imp@bsdimp.com> References: <861xb0ha8r.fsf@xps.des.no> <86acpnmzih.fsf@xps.des.no> <20050301.094356.112814615.imp@bsdimp.com>
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On Tuesday 01 March 2005 11:43 am, M. Warner Losh wrote: > In message: <86acpnmzih.fsf@xps.des.no> > > des@des.no (Dag-Erling Sm=F8rgrav) writes: > : John Baldwin <jhb@FreeBSD.org> writes: > : > How about a custom boot kernel? When I suggested 12MB rather than > : > 7MB in the original PR, I was thinking of the case of building a > : > stripped-down custom kernel. GENERIC certainly isn't going to fit > : > well in 16MB. > : > : A custom kernel should work better. I figured out that the "missing" > : memory is in fact the memory used by the kernel, so a system with a > : trimmed kernel should have a lot more memory available. I'll run some > : more tests... > > I've booted a stripped down (but not minimal) kernel with > hw.physmem=3D10M to single user, but couldn't even get to multi-user > with 16M: Too many processes and too much swapping (I didn't trim my > enabled list on my laptop). If I booted a minimal kernel, and did > some creative trimming, I think I can get down closer to 6M to 8M on a > fairly small system (no acpi, etc), but it would be painful to run in > that environemnt, unless you had special needs (eg, it was an embedded > platform). Then I think we should just say 24MB is the minimum required for both insta= ll=20 and running given all the comments. It will also simplify the docs if we=20 just go with one number for minimum memory requirement. =2D-=20 John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" =3D http://www.FreeBSD.org
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