On Wed, May 26, 2021 at 12:33 PM Josh Triplett <josh@xxxxxxxxxxxxxxxx> wrote: > > On Tue, May 25, 2021 at 10:23:09PM -0500, Eric W. Biederman wrote: > > If we are going to do this something that is so small and clean it can > > be done unconditionally always. > [...] > > The net request as I understand it: Make the filesystem the initramfs > > lives in be an ordinary filesystem so it can just be used as the systems > > primary filesystem. > > Including the ability to pivot_root it away, which seems like the main > sticking point. > > If this can be done without any overhead, that seems fine, but if this > involves mounting an extra filesystem, that may add an appreciable > amount of boot time for systems trying to boot in milliseconds. (Such > systems would not use an initramfs if they're going to go on and boot a > separate root filesystem, but they can use an initramfs as their *only* > filesystem.) Compared to the time the unpacking spent, a mounting seems nothing. In the scene above, this change can be disabled by kconfig, if pivot_root is not needed in initramfs. Thanks! Menglong Dong
