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Toot

Written by Aaron Sawdey, Ph.D. on 2024-11-10 at 17:16

@pid_eins Does systems-remount-fs not like /dev/mapper paths? Switching to a different disk for boot/root on a ubuntu 22.04 system and I used that type of path for / in fstab and it didn't give errors on boot but didn't remount as rw either which was not helpful. Changed to a /dev/disk/by-uuid/ path and now it's working ...

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Descendants

Written by Lennart Poettering on 2024-11-12 at 08:15

@acsawdey systemd-remount-fs is mostly a wrapper around /bin/mount, and calls it in parallel for the root fs, for /usr/ and for the API VFS (i.e. /sys/, /proc/, …).

Hence, there's barely any logic in systemd-remount-fs, it just forks of children in paralell that run /bin/mount commands and waits for them to finish.

Or in other words: if there's an issue here it's probably in /bin/mount, not in systemd...

(But I never heard of an issue like yours before)

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Written by Aaron Sawdey, Ph.D. on 2024-11-12 at 12:22

@pid_eins Yeah that’s kind of the conclusion I came to after poking at it with strace and staring at the source. It looks like there is an env var that’s passed to tell it to add “rw” to the mount options in addition to remount, I couldn’t tell where that gets generated.

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