Hi, On Wed, 26 Oct 2016, Miklos Szeredi wrote: > On Tue, Oct 25, 2016 at 1:57 PM, Raphael Hertzog <hertzog@xxxxxxxxxx> wrote: [ redirect feature enabled by default ] > I think it would be safe to make it the default if upperdir is empty. > Nonempty implies that it was created with old kernel (or it was > crafted by hand). But there should be a way to explicitly turn it > off; either because of the need for backward compatibility or because > the old format is simply easier to work with for humans. > > How about: > > - If upper is nonempty, then leave redirect feature alone except when > mount option "-oredirect=on" is used to force enabling it. > - If upper is empty, then enable redirect feature except when mount > option "-oredirect=off" is used to force disabling it. Looks good, but is there some stickyness of the setting? My use case is schroot and it always starts with an empty upperdir when I create a temporary/throw-away chroot but if I reboot the machine, then it's possible that schroot will remount the overlayfs with a non-empty upperdir (the temporary chroot is preserved until I explicitly end the chroot). Cheers, -- Raphaël Hertzog ◈ Debian Developer Support Debian LTS: http://www.freexian.com/services/debian-lts.html Learn to master Debian: http://debian-handbook.info/get/ -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
