On Mon, Oct 28, 2019 at 01:28:09PM +0300, Konstantin Khlebnikov wrote:
+ if (dax_mapping(mapping))
+ pages = READ_ONCE(mapping->nrexceptional);
+ pages = READ_ONCE(mapping->nrpages);
I'm not sure this is the right calculation for DAX files. We haven't
allocated any memory for DAX; we're just accessing storage directly.
The entries in the page caache are just translation from file offset to