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Date: Wed, 22 Apr 2026 08:04:17 +0200
From: Christoph Hellwig <hch@lst.de>
To: Niklas Cassel <cassel@kernel.org>
Cc: Carlos Maiolino <cem@kernel.org>, Christoph Hellwig <hch@lst.de>,
	Damien Le Moal <dlemoal@kernel.org>,
	Hans Holmberg <hans.holmberg@wdc.com>,
	Johannes Thumshirn <johannes.thumshirn@wdc.com>,
	linux-xfs@vger.kernel.org
Subject: Re: [PATCH 2/2] xfs: expose the current zonegc required status in
 sysfs
Message-ID: <20260422060417.GD5391@lst.de>
References: <20260420135011.624587-4-cassel@kernel.org> <20260420135011.624587-6-cassel@kernel.org>
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User-Agent: Mutt/1.5.17 (2007-11-01)

On Mon, Apr 20, 2026 at 03:50:14PM +0200, Niklas Cassel wrote:
> The current zonegc required status is currently available in
> /proc/<pid>/mountstats (which contains stats for all mounted zoned XFS
> filesystems), under "RT GC required:".
> 
> Add a sysfs attribute /sys/fs/xfs/<dev>/zoned/zonegc_required for the same.
> This makes it trivial for monitoring software to read the value, for a
> specific filesystem, without any complex parsing.

GC needed is a very complex internal condition, and I don't think
exposing the current value as a stable ABI is a good idea.

What are you trying to do with this information?