On Wed, Jun 28, 2017 at 04:01:47PM -0600, Ross Zwisler wrote:
> When servicing mmap() reads from file holes the current DAX code allocates
> a page cache page of all zeroes and places the struct page pointer in the
> mapping->page_tree radix tree. This has three major drawbacks:
>
> 1) It consume
When servicing mmap() reads from file holes the current DAX code allocates
a page cache page of all zeroes and places the struct page pointer in the
mapping->page_tree radix tree. This has three major drawbacks:
1) It consumes memory unnecessarily. For every 4k page that is read via a
DAX mmap()
