Pavel Machek wrote:
Hi!

Did this succeed? If the application is still truncating that file, the
umount should have failed.
Actually, what I expect to happen is for the remount,ro
to block until the file deletion completes. But it doesn't.

Once a f/s is read-only, there should be NO writing to it. Right?

Linux happily writes to filesystems mounted read-only. It will replay
journal on them.

That's a bug and needs fixed.  Read only means read _only_.

And the question still remains; why is sync() not blocking until the file has been completely unlinked and the disk is consistent?
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