Re: port-amd64/54776: install media does not contain support for LVM

[Martin Husemann <martin%duskware.de@localhost>]

The following reply was made to PR port-amd64/54776; it has been noted by GNATS.

From: Martin Husemann <martin%duskware.de@localhost>
To: "Eric S. Hvozda" <hvozda%ack.org@localhost>
Cc: Tomohiro Kusumi <kusumi.tomohiro%gmail.com@localhost>, gnats-bugs%netbsd.org@localhost
Subject: Re: port-amd64/54776: install media does not contain support for LVM
Date: Thu, 19 Dec 2019 18:14:27 +0100

 On Thu, Dec 19, 2019 at 10:20:13AM -0500, Eric S. Hvozda wrote:
 > In the past, / was writable on the install media; before version 8,
 > /dev was a tmpfs.
 
 Indeed - and it was apparently me some years back that changed it
 (in src/distrib/common/Makefile.bootcd):
 
 ---8<---
 revision 1.28
 date: 2015-05-25 17:38:33 +0200;  author: martin;  state: Exp;  lines: +90 -19;  commitid: NOTKl2IY8AGSeQmy;
 2nd try: make amd64, i386, sparc64 and vax iso images use full sets.
 While there fix an old bug that makefs used the build hosts /etc/group
 and passwd information when creating the image.
 Thanks to Andreas Gustafsson for extensive testing.
 --->8---
 
 I dimly remember trying to get memory usage down for VAX CDs, and the tmpfs
 costs kernel memory. Back then I saw no downside with this aproach - but now
 you have shown there is ;-)
 
 I'll make it configurable and only have VAX use the expanded /dev, leaving
 it empty for all others, so init will union mount the tmpfs automatically.
 
 Let me fire up a test build....
 
 
 Martin