linux-kernel - Re: [PATCH] xfs: add tunable threshold parameter for triggering zone GC

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Message-ID: <20250328110127.GA20388@lst.de>
Date: Fri, 28 Mar 2025 12:01:27 +0100
From: hch <hch@....de>
To: Hans Holmberg <Hans.Holmberg@....com>
Cc: Carlos Maiolino <cem@...nel.org>, Dave Chinner <david@...morbit.com>,
	"Darrick J . Wong" <djwong@...nel.org>, hch <hch@....de>,
	"linux-xfs@...r.kernel.org" <linux-xfs@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] xfs: add tunable threshold parameter for triggering
 zone GC

On Tue, Mar 25, 2025 at 09:10:49AM +0000, Hans Holmberg wrote:
> +Zoned Filesystems
> +=================
> +
> +For zoned file systems, the following attributes are exposed in:
> +
> + /sys/fs/xfs/<dev>/zoned/
> +
> + max_open_zones                 (Min:  1  Default:  Varies  Max:  UINTMAX)
> +        This read-only attribute exposes the maximum number of open zones
> +        available for data placement. The value is determined at mount time and
> +        is limited by the capabilities of the backing zoned device, file system
> +        size and the max_open_zones mount option.

This should go into 6.15-rc as a separate patch to fix my mistake of not
adding documentation for this file.  (Thanks for fixing that!)

Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@....de>