From: Ian Abbott <abbotti@mev.co.uk>
To: ptxdist <ptxdist@pengutronix.de>
Subject: [ptxdist] Race condition between rc-once.service and systemd-remount-fs.service
Date: Fri, 3 May 2024 19:33:32 +0100 [thread overview]
Message-ID: <bee78d99-7c3a-4fea-8416-99d18ebb82ed@mev.co.uk> (raw)
Hi,
If the root file system is initially mounted read-only, there is a
possible race between rc-once.service and the
systemd-remount-fs.service. If rc-once.service sees the root filesystem
is mounted read-only, then it will temporarily remount it read-write and
later mount it read-only again. Meanwhile, systemd-remount-fs.service
will also remount the root file system as specified by /etc/fstab which
could be read-write. Depending on the ordering, it is possible for the
root file-system to end up mounted read-only when it should have ended
up mounted read-write.
As long as the two services do not run simultaneously, the root file
system should end up mounted in the correct state. However, I do not
know what the intended order is supposed to be. Perhaps it is
intentionally system-dependent?
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next reply other threads:[~2024-05-03 18:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-03 18:33 Ian Abbott [this message]
2024-05-09 9:34 ` Michael Olbrich
2024-05-09 11:40 ` Ian Abbott
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