linux-ext4 - [Bug 214927] re-mount read-write (mount -oremount,rw) of read-only filesystem rejected with EROFS, but block device is not read-only

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Message-ID: <bug-214927-13602-jdSDZcum15@https.bugzilla.kernel.org/>
Date:   Wed, 03 Nov 2021 10:06:19 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...r.kernel.org
Subject: [Bug 214927] re-mount read-write (mount -oremount,rw) of read-only
 filesystem rejected with EROFS, but block device is not read-only

https://bugzilla.kernel.org/show_bug.cgi?id=214927

--- Comment #2 from Ulrich.Windl (Ulrich.Windl@...uni-regensburg.de) ---
Having a second look, it seems the first error was concurrently with fstrim, so
possibly fstrim can play a role in the scenario:
kernel: print_req_error: I/O error, dev xvdb, sector 29730024
fstrim[8864]: fstrim: /var: FITRIM ioctl failed: Input/output error
fstrim[8864]: fstrim: /tmp: FITRIM ioctl failed: Input/output error
...
(the final message was like 13 minutes after those above)

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