linux-kernel - Re: [PATCH 1/5] btrfs: rename EXTENT_BUFFER_NO_CHECK to EXTENT_BUFFER

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Message-ID: <20231122132010.GY11264@twin.jikos.cz>
Date:   Wed, 22 Nov 2023 14:20:10 +0100
From:   David Sterba <dsterba@...e.cz>
To:     Johannes Thumshirn <johannes.thumshirn@....com>
Cc:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>, linux-btrfs@...r.kernel.org,
        linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Naohiro Aota <Naohiro.Aota@....com>
Subject: Re: [PATCH 1/5] btrfs: rename EXTENT_BUFFER_NO_CHECK to
 EXTENT_BUFFER_CANCELLED

On Tue, Nov 21, 2023 at 08:32:30AM -0800, Johannes Thumshirn wrote:
> EXTENT_BUFFER_CANCELLED better describes the state of the extent buffer,
> namely its writeout has been cancelled.

I've read the patches a few times and still can't see how the meaning of
'cancelled' fits. It's about cancelling write out yes, but I don't see
anywhere explained why and why the eb is zeroed. This could be put next
to the enum definition or to function that does the main part of the
logic. You can also rename it to CANCELLED_WRITEOUT or use _ZONED_ in
the name so it's clear that it has a special purpose etc, but as it is
now I think it should be improved.