Re: [PATCH v4 3/4] mm/sparse: Add a new parameter 'data_unit_size' for alloc_usemap_and_memmap
From
Dave Hansen <>
Date
Thu, 7 Jun 2018 15:48:07 -0700
On 05/21/2018 03:15 AM, Baoquan He wrote: > It's used to pass the size of map data unit into alloc_usemap_and_memmap, > and is preparation for next patch.
This is the "what", but not the "why". Could you add another sentence or two to explain why we need this?