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Date:   Mon, 26 Nov 2018 14:51:28 +0100
From:   Jean-Christophe Guillain <jcguillain@...uans.com>
To:     <tytso@....edu>
Cc:     <darrick.wong@...cle.com>, <linux-ext4@...r.kernel.org>
Subject: Re: Metadata_csum is still enabled after trying to disable it.


----- On Nov 24, 2018, at 4:48 AM, Theodore Y. Ts'o tytso@....edu wrote:

​​​​​> On Wed, Nov 21, 2018 at 07:01:19PM -0800, Darrick J. Wong wrote:
>> > Is it a bug ?
>> 
>> Yes.
>> 
>> > How can I actually disable this parameter ?
>>
> 
> Actually, the metadata_csum feature *was* disabled.  You would have
> seen that if you looked at the "Features: " line printed by dumpe2fs
> -h or tune2fs -l.  The bug was that we were erroneously warning that
> the tune2fs -U operation would take a long time when flex_bg was
> enabled, but metadata_csum was not.  So it was misleading wrong, but
> it actually turning off the metadata_csum feature.
> 

Thank you very much for your time !

jC




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