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 <[email protected]>
http://karelzak.blogspot.com
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