Add a resolution on two "Preparing Virtual File Systems" threads brought up on lfs-dev

[Armin]

Namely

​http://www.mail-archive.com/lfs-dev@linuxfromscratch.org/msg19225.html

and

​http://www.mail-archive.com/lfs-dev@linuxfromscratch.org/msg19224.html

See also the rest of the discussion regarding both.

[bdubbs@…]

Also add a 'rm -rf /run/*' to "Cleaning Up"

[Armin]

May I also suggest to add the same for /tmp? systemd mounts a tmpfs on /tmp by default and it will complain if it's not empty (although it's just a message, it will still work correctly).

Just for the consistence.

[bdubbs@…]

Good idea. My test build has 327M in /tmp. That needs to be removed. I wasn't that concerned about the 32K in /run, but upon reflection, both need to be cleaned up.

[bdubbs@…]

After research, the --bind option does not recursively mount sub-mounts. That is, doing a bind-mount on /dev does not mount /dev/pts (you need --rbind for that). I'm not going to change that part of the ticket, but will clean up /tmp and /run at the end of Chapter 6.

Although /dev/console and /dev/null are not needed in a lot of cases during boot, they are needed in some cases. We'll leave that alone too.

Fixed at revision 10440.