On 7/14/25 08:13, Christoph Hellwig wrote:
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.
Hmm. It does, but really the meaning of 'chunk_sectors' (ie a boundary
which I/O requests may not cross) hasn't changed. And that's also
the original use-case for the mapping of zone size to chunk_sectors,
namely to ensure that the block layer generates valid I/O.
So from that standpoint I guess we can change it; in the end, there may
(and will) be setups where 'chunk_sectors' is smaller than the zone
size.
We would need to have another attribute for the zone size, though :-)
But arguably we should have that even if we don't follow the above
reasoning.
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
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