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Date:   Thu, 13 Jun 2019 10:09:22 -0400
From:   Josef Bacik <josef@toxicpanda.com>
To:     Naohiro Aota <naohiro.aota@wdc.com>
Cc:     linux-btrfs@vger.kernel.org, David Sterba <dsterba@suse.com>,
        Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
        Qu Wenruo <wqu@suse.com>, Nikolay Borisov <nborisov@suse.com>,
        linux-kernel@vger.kernel.org, Hannes Reinecke <hare@suse.com>,
        linux-fsdevel@vger.kernel.org,
        Damien Le Moal <damien.lemoal@wdc.com>,
        Matias =?utf-8?B?QmrDuHJsaW5n?= <mb@lightnvm.io>,
        Johannes Thumshirn <jthumshirn@suse.de>,
        Bart Van Assche <bvanassche@acm.org>
Subject: Re: [PATCH 08/19] btrfs: make unmirroed BGs readonly only if we have
 at least one writable BG
Message-ID: <20190613140921.a2kmty5p6lzqztej@MacBook-Pro-91.local>
References: <20190607131025.31996-1-naohiro.aota@wdc.com>
 <20190607131025.31996-9-naohiro.aota@wdc.com>
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On Fri, Jun 07, 2019 at 10:10:14PM +0900, Naohiro Aota wrote:
> If the btrfs volume has mirrored block groups, it unconditionally makes
> un-mirrored block groups read only. When we have mirrored block groups, but
> don't have writable block groups, this will drop all writable block groups.
> So, check if we have at least one writable mirrored block group before
> setting un-mirrored block groups read only.
> 

I don't understand why you want this.  Thanks,

Josef