Am Wed, 13 Feb 2013 09:52:46 -0500 schrieb Dave Reisner <d@xxxxxxxxxxxxxx>: > On Wed, Feb 13, 2013 at 03:25:36PM +0100, Karel Zak wrote: > > On Sat, Feb 09, 2013 at 07:22:50PM +0100, Richard Weinberger wrote: > > > As switch_root basically does rm -Rf / we should make sure > > > that / is really an initramfs. > > > > Oh, nice (we should not ask for details, right? :-) Applied, thanks. > > > > Karel > > > > Wouldn't it be better to check that / is tmpfs or ramfs instead of > insistence on being a very specific device? Not really. switch_root is designed for initramfs only, so the check against tmpfs is useless. We can identify an initramfs only because it is the very first mounted filesystem. The kernel mounts it as rootfs very early, see fs/namespace.c So the device 0,1 allows us to identify initramfs nicely. Checking against type ramfs does not make much sense. It would allow false positives, If someone overmounted / with an ramfs (or even tmpfs) then there is no need at all to use switch_root, just use pivot_root. Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
