Re: when to remount sysfs ?

On Mon, May 06, 2013 at 12:31:17AM +0800, ishare wrote:

Hi:

As i know , when kernel is booting , sysfs is mounted at /sys before the real root fs is mounted .

Then , after the real root fs is mounted , when does i need to remount sysfs at the new /sys location ?

I know the devfs is remounted by do_mount ("none", "/dev", "devfs", 0, "") , so how is that for sysfs?

It depends on initramfs, for example switch_root(8) command from util-linux or "systemctl switch-root" (systemd reimplementation) moves /dev, /proc, /sys and /run to the new root by MS_MOVE mount(2) operation. Karel -- Karel Zak <kzak@redhat.com> http://karelzak.blogspot.com