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I want to use laptop mode and remount my journaled filesystems with long commit intervals... anyway this is ok with my /home filesystem, but when I try to remount my / filesystem, nothing changes.
That is, I do:
mount -o remount,commit=600 /dev/dm-1
but then the output of mount shows nothing about the "commit=" option, while for /home this works.
dmes and /var/log/messages log nothing when I execute this command... is it possible at all to remount the root device with a non-default commit interval?
Thank you for your answer. No, also your suggestion does not work.
Yes I know 10m is maybe too much, well it's only an example, no other value works anyway. I do want journalling, but I want to disable it whenever I want, for energy saving (and curiosity). And changing the filesystem type on-the-fly is not possible anyway, so it's not suitable for laptop-mode scripts