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Date:   Thu, 1 Jun 2023 06:53:02 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc:     Johannes Thumshirn <Johannes.Thumshirn@wdc.com>,
        Christoph Hellwig <hch@lst.de>,
        Naohiro Aota <Naohiro.Aota@wdc.com>,
        "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: new scrub code vs zoned file systems
Message-ID: <20230601045302.GA22596@lst.de>
References: <20230531125224.GB27468@lst.de> <546fad79-f436-c561-8b9b-0d9a7db09522@wdc.com> <20230531132032.GA30016@lst.de> <821003e3-b457-90ba-e733-8c2fdd0c3b3c@wdc.com> <20230531133038.GA30855@lst.de> <a59b2274-9d64-f11e-f726-9283f560a495@wdc.com> <ea984319-decb-ce86-aed4-d4520bf3ad3d@gmx.com>
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On Thu, Jun 01, 2023 at 06:25:59AM +0800, Qu Wenruo wrote:
> To me, the problem can be solved in a much simpler way, if it's
> dev-replace for zoned device, let's write the whole stripe to the target
> device, and wait for it.
>
> For the btrfs_record_physical_zoned(), we can skip the OE things if
> bbio::inode is NULL.
>
> Would the following change solves the problem?

It can't, as we need to record the actually written location.