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Date: Tue, 4 Nov 2025 15:41:58 +0100
From: Christoph Hellwig <hch@lst.de>
To: Damien Le Moal <dlemoal@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>, linux-block@vger.kernel.org,
	linux-nvme@lists.infradead.org, Keith Busch <keith.busch@wdc.com>,
	Christoph Hellwig <hch@lst.de>, dm-devel@lists.linux.dev,
	Mike Snitzer <snitzer@kernel.org>,
	Mikulas Patocka <mpatocka@redhat.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	linux-scsi@vger.kernel.org, linux-xfs@vger.kernel.org,
	Carlos Maiolino <cem@kernel.org>, linux-btrfs@vger.kernel.org,
	David Sterba <dsterba@suse.com>
Subject: Re: [PATCH v3 00/15] Introduce cached report zones
Message-ID: <20251104144158.GA27416@lst.de>
References: <20251104013147.913802-1-dlemoal@kernel.org>
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User-Agent: Mutt/1.5.17 (2007-11-01)

I just threw this into my xfstests setup, and it seems this version
is broken somehow.  Running on emulated ZNS devices with XFS I get
a lot of failures with warnings like this:

[   30.068652] XFS (nvme1n1): empty zone 1 has non-zero used counter (0x1).

[   49.316873] XFS (nvme0n1): empty zone 2 has non-zero used counter (0x10).

so it seems like it's not tracking WPs correctly, probably when using
zone append and unmount/remounting.