linux-ext4 - Re: [PATCH v2 2/2] ext4: print quota journalling mode on (re-)mount

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Date:   Thu, 22 Oct 2020 06:29:18 +0300 (MSK)
From:   Roman Anufriev <dotdot@...dex-team.ru>
To:     Jan Kara <jack@...e.cz>
cc:     linux-ext4@...r.kernel.org, tytso@....edu,
        dmtrmonakhov@...dex-team.ru
Subject: Re: [PATCH v2 2/2] ext4: print quota journalling mode on
 (re-)mount

On Mon, 19 Oct 2020, Jan Kara wrote:

> On Sun 18-10-20 05:02:27, Roman Anufriev wrote:
>> Right now, it is hard to understand what quota journalling type is enabled:
>> you need to be quite familiar with kernel code and trace it or really
>> understand what different combinations of fs flags/mount options lead to.
>>
>> This patch adds printing of current quota jounalling mode on each
>> mount/remount, thus making it easier to check it at a glance/in autotests.
>> The semantics is similar to ext4 data journalling modes:
>>
>> * journalled - quota accounting and journaling are enabled
>> * writeback  - quota accounting is enabled, but journalling is disabled
>
> The above two descriptions are still somewhat misleading - in fact we don't
> know whether accounting is enabled or not. Just *if* it is enabled, quota
> will be journalled / non-journalled. So I'd probably describe it like:
> * journalled - quota configured, journalling will be enabled
> * writeback - quota configured, journalling will be disabled

Yeah, you are right, I'll fix this in v4.

> We've talked with Ted on last ext4 conf call and we agreed that it's
> probably time to deprecate old style quotas in external quota files and
> transition everybody to using quotas with quota feature. That way things
> will get simpler again. But before we can disable that functionality, it
> will take a few years of deprecation warnings etc. so that's not directly
> related to your patch here. JFYI.

It will be great!

 								Roman