On Thu, Jun 15, 2017 at 04:58:56PM +0200, Jan Kara wrote:
> On Wed 14-06-17 11:22:11, Ross Zwisler wrote:
> > @@ -216,17 +217,6 @@ static void dax_unlock_mapping_entry(struct
> > address_space *mapping,
> > dax_wake_mapping_entry_waiter(mapping, index, entry, false);
> > }
> >
> > -static v
On Wed 14-06-17 11:22:11, 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 two major drawbacks:
>
> 1) It consumes memory unnecessa
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 two major drawbacks:
1) It consumes memory unnecessarily. For every 4k page that is read via a
DAX mmap() o
