On Sun, Mar 18, 2012 at 07:27:55PM +0000, Al Viro wrote:
> On Sun, Mar 18, 2012 at 12:02:04PM -0700, Linus Torvalds wrote:
> Incidentally, I wonder if we want the whole thing in fs/proc; the argument
> against splitoff to a separate fs used to be "that would break userland
> setups - can't ask people to update /etc/fstab or init scripts to mount
> that thing on /proc/sys".  Fair enough, but... what's to stop us from slapping
> ->d_automount() on /proc/sys like that:
> 	struct vfsmount *mnt = vfs_kern_mount(&sysctlfs_type, 0, "sysctl", 0);
> 	if (!IS_ERR(mnt))
> 		mntget(mnt);
> 	return mnt;
> and we are all set.  IOW, now that ->d_automount() stuff is there, we can
> do that easily without any userland breakage.  Comments?

IIRC, fstab argument was the only one.