Re: [PATCH v6 0/6] block/md/dm: set chunk_sectors from stacked dev stripe size

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To: Damien Le Moal <dlemoal@xxxxxxxxxx>
Subject: Re: [PATCH v6 0/6] block/md/dm: set chunk_sectors from stacked dev stripe size
From: Christoph Hellwig <hch@xxxxxx>
Date: Mon, 14 Jul 2025 08:13:00 +0200
Cc: Christoph Hellwig <hch@xxxxxx>, John Garry <john.g.garry@xxxxxxxxxx>, agk@xxxxxxxxxx, snitzer@xxxxxxxxxx, mpatocka@xxxxxxxxxx, song@xxxxxxxxxx, yukuai3@xxxxxxxxxx, nilay@xxxxxxxxxxxxx, axboe@xxxxxxxxx, cem@xxxxxxxxxx, dm-devel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, ojaswin@xxxxxxxxxxxxx, martin.petersen@xxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx, djwong@xxxxxxxxxx
In-reply-to: <c71ce330-d7b5-45ea-ba46-97598516e9fc@kernel.org>
References: <20250711080929.3091196-1-john.g.garry@oracle.com> <f80713ec-fef1-4a33-b7bf-820ca69cb6ce@kernel.org> <20250714055338.GA13470@lst.de> <c71ce330-d7b5-45ea-ba46-97598516e9fc@kernel.org>
User-agent: Mutt/1.5.17 (2007-11-01)

On Mon, Jul 14, 2025 at 03:00:57PM +0900, Damien Le Moal wrote:
> Agreed, it would be nice to clean that up. BUT, the chunk_sectors sysfs
> attribute file is reporting the zone size today. Changing that may break
> applications. So I am not sure if we can actually do that, unless the sysfs
> interface is considered as "unstable" ?

Good point.  I don't think it is considered unstable.

Follow-Ups:
- Re: [PATCH v6 0/6] block/md/dm: set chunk_sectors from stacked dev stripe size
  - From: Hannes Reinecke

References:
- [PATCH v6 0/6] block/md/dm: set chunk_sectors from stacked dev stripe size
  - From: John Garry
- Re: [PATCH v6 0/6] block/md/dm: set chunk_sectors from stacked dev stripe size
  - From: Damien Le Moal
- Re: [PATCH v6 0/6] block/md/dm: set chunk_sectors from stacked dev stripe size
  - From: Christoph Hellwig
- Re: [PATCH v6 0/6] block/md/dm: set chunk_sectors from stacked dev stripe size
  - From: Damien Le Moal

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