I took a look at mount.c As root partition is already mounted, 'mount -a' does nothing with it. https://git.busybox.net/busybox/tree/util-linux/mount.c#n2364
When remounting, mtab is always favored instead of fstab so no option change possible. https://git.busybox.net/busybox/tree/util-linux/mount.c#n2291 // Open either fstab or mtab if (cmdopt_flags & MS_REMOUNT) { // WARNING. I am not sure this matches util-linux's // behavior. It's possible util-linux does not // take -o opts from mtab (takes only mount source). fstabname = bb_path_mtab_file; } fstab = setmntent(fstabname, "r"); >From my understanding it is currently not possible in a standard buildroot/busybox environment that mount options from /etc/fstab for the root partition are taken into consideration. The only option I see right now is manually adding the mount options to either kernel command line or e.g. the mount commands in /etc/inittab. Please correct me if I'm wrong. I'd also be happy for any suggestions. Taking a quick glance at mount.c in util-linux there is some merging of fstab/mtab flags going on. Thanks & best regards Andreas Hilse
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