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

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Message-ID: <9f48501e-2901-41bb-bc8c-71c480f912f1@wdc.com>
Date: Fri, 28 Mar 2025 12:16:22 +0000
From: Hans Holmberg <Hans.Holmberg@....com>
To: hch <hch@....de>
CC: Carlos Maiolino <cem@...nel.org>, Dave Chinner <david@...morbit.com>,
	"Darrick J . Wong" <djwong@...nel.org>, "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 28/03/2025 12:01, hch wrote:
> 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!)

Right, I might as well document the zoned mount options (lifetime, nolifetime,
max_open_zones) as part of that patch to make the doc completely up to date.