From 8c0fa2cc56c74b96dc043bc7d9d8e3db005b33a8 Mon Sep 17 00:00:00 2001 From: Warner Losh Date: Wed, 20 Dec 2017 16:02:11 +0000 Subject: [PATCH] Flesh out the reason for the need for tmpfs a little. Sponsored by: Netflix --- sbin/reboot/reboot.8 | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/sbin/reboot/reboot.8 b/sbin/reboot/reboot.8 index 6833fdd213a3..5fee3ece7c67 100644 --- a/sbin/reboot/reboot.8 +++ b/sbin/reboot/reboot.8 @@ -144,7 +144,10 @@ After changing vfs.root.mountfrom with can be used to change the root filesystem while preserving kernel state. This requires the .Xr tmpfs 5 -kernel module to be loaded. +kernel module to be loaded because +.Xr init 8 +needs a place to store itself after the old root is unmounted, but +before the new root is in place. .El .Pp The