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Date:   Wed, 26 Jul 2023 06:07:29 -0700
From:   "hch@infradead.org" <hch@infradead.org>
To:     Naohiro Aota <Naohiro.Aota@wdc.com>
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        "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: [PATCH 4/8] btrfs: zoned: reserve zones for an active
 metadata/system block group
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On Tue, Jul 25, 2023 at 09:07:19AM +0000, Naohiro Aota wrote:
> We can convert the profile from SINGLE to DUP while the FS is running. So,
> simply storing it won't work.
> 
> But, we can hook the converting process and increase the reservation count
> if it is converting to DUP? Then, we can calculate it on mount and record
> it in fs_info.

That sounds like the right thing to do to me.