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. Thanks ! -- Damien Le Moal Western Digital Research
