[dm-devel] [PATCH V6 3/4] sd_zbc: Fix report zones buffer allocation

[Martin K. Petersen]

Damien,

> During disk scan and revalidation done with sd_revalidate(), the zones
> of a zoned disk are checked using the helper function
> blk_revalidate_disk_zones() if a configuration change is detected
> (change in the number of zones or zone size). The function
> blk_revalidate_disk_zones() issues report_zones calls that are very
> large, that is, to obtain zone information for all zones of the disk
> with a single command. The size of the report zones command buffer
> necessary for such large request generally is lower than the disk
> max_hw_sectors and KMALLOC_MAX_SIZE (4MB) and succeeds on boot (no
> memory fragmentation), but often fail at run time (e.g. hot-plug
> event). This causes the disk revalidation to fail and the disk
> capacity to be changed to 0.

Probably easiest to funnel this through block with the rest of the
series.

Acked-by: Martin K. Petersen <martin.petersen at oracle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering