On 12/11/18 3:55 PM, Damien Le Moal wrote: > On 2018/12/11 22:44, Jens Axboe wrote: >> On 12/11/18 5:08 AM, Shin'ichiro Kawasaki wrote: >>> null_blk_zoned creation fails if the number of zones specified is equal to >>> or is >>> smaller than 64 due to a memory allocation failure in blk_alloc_zones(). >>> With >>> such a small number of zones, the required memory size for all zones >>> descriptors >>> fits in a single page, and the page order for alloc_pages_node() is zero. >>> Allow >>> this value in blk_alloc_zones() for the allocation to succeed. >> >> Looks good to me, this looks like 4.20 material. > > Yes, this is a fix for commit bf5054569653 "block: Introduce > blk_revalidate_disk_zones()" that was included in 4.20 merge window.
If only the patch already had a Fixes tag! Queued up for 4.20. -- Jens Axboe
