linux-ext4 - Remounting filesystem read-only

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Date:   Thu, 26 Jul 2018 18:04:05 -0700
From:   Sodagudi Prasad <psodagud@...eaurora.org>
To:     tytso@....edu, adilger.kernel@...ger.ca, wen.xu@...ech.edu
Cc:     linux-ext4@...r.kernel.org
Subject: Remounting filesystem read-only

Hi All,

Observing the following issue with one of the partition on android 
device with 4.14.56 kernel.  When I try to remount this partition using 
the command - mount -o rw,remount /vendor/dsp, it is remounting as 
read-only.

[  191.364358] EXT4-fs error (device sde9): ext4_has_uninit_itable:3108: 
comm mount: Inode table for bg 0 marked as needing zeroing
[  191.364762] Aborting journal on device sde9-8.
[  191.365226] EXT4-fs (sde9): Remounting filesystem read-only
[  191.365232] EXT4-fs (sde9): re-mounted. Opts: data=ordere

If I revert this commit [1] -"ext4: only look at the bg_flags field if 
it is valid", the issue is not observed. It is just giving following 
warning message.
[1] - https://patchwork.ozlabs.org/patch/929239/.

[  123.373456] EXT4-fs (sde9): warning: mounting fs with errors, running 
e2fsck is recommended
[  123.389649] EXT4-fs (sde9): re-mounted. Opts: data=ordered

Can you provide some inputs what could be the issue with this partition?

-Thanks, Prasad
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