linux-kernel - Re: ext4 online resize -> EXT4-fs error (device loop0) in ext4_update_backup

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Message-ID: <04aa2fa5-c04d-d2ad-55e4-f78705b513ac@theobroma-systems.com>
Date:   Fri, 28 Oct 2022 13:49:42 +0200
From:   Jakob Unterwurzacher <jakob.unterwurzacher@...obroma-systems.com>
To:     Theodore Ts'o <tytso@....edu>
Cc:     "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Schulz, Quentin" <quentin.schulz@...obroma-systems.com>
Subject: Re: ext4 online resize -> EXT4-fs error (device loop0) in
 ext4_update_backup_sb:174: Filesystem failed CRC

On 28.10.22 05:59, Theodore Ts'o wrote:
> 
> Thanks for the reproducer!  The following patch should fix things.
> 
>         	       		      		- Ted
> 
>  From 9a8c5b0d061554fedd7dbe894e63aa34d0bac7c4 Mon Sep 17 00:00:00 2001
> From: Theodore Ts'o <tytso@....edu>
> Date: Thu, 27 Oct 2022 16:04:36 -0400
> Subject: [PATCH] ext4: update the backup superblock's at the end of the online
>   resize

Hi Theodore,

I tested the patch on arm64 and it fixes the issue. Now the kernel 
messages are just this:

> [   14.769997] EXT4-fs (mmcblk2p1): resizing filesystem from 139771 to 3888507 blocks
> [   15.020593] EXT4-fs (mmcblk2p1): resized filesystem to 3888507
fsck after the resize is happy too.

Thank you!
Jakob