Jeremy Utley wrote:
As indicated by the email from Greg earlier, we do create /dev/shm as a directory during the install process. However, mounting a tmpfs filesystem there to allow POSIX shared memory support is an optional, although recommended and default, thing to do. There's actually some docs (I believe either glibc or the kernel) where it is notated that this mount *should* occur, and in fact, nearly every GNU/Linux distribution today does this (I think the one exception is Slackware, and while it's a great distro, it's always been somewhat of a different beast). So, the moral of the story is, while not completely necessary, mounting a tmpfs filesystem at /dev/shm is not an absolute requirement, but is recommended. HTH, Jeremy
So, what exactly does this mean in terms of the book's text? If the book is going to say that the mount point is "optional" and not used a lot then it should also explain why it's used during the LFS build process itself.
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