Re: [PATCH v14 052/138] mm: Add folio_raw_mapping()

On Wed, Aug 11, 2021 at 03:59:06PM +0200, Vlastimil Babka wrote:

On 7/15/21 5:35 AM, Matthew Wilcox (Oracle) wrote:

quoted

Convert __page_rmapping to folio_raw_mapping and move it to mm/internal.h.
It's only a couple of instructions (load and mask), so it's definitely
going to be cheaper to inline it than call it.  Leave page_rmapping
out of line.

Maybe mention the page_anon_vma() in changelog too?

Convert __page_rmapping to folio_raw_mapping and move it to mm/internal.h.
It's only a couple of instructions (load and mask), so it's definitely
going to be cheaper to inline it than call it.  Leave page_rmapping
out of line.  Change page_anon_vma() to not call folio_raw_mapping() --
it's more efficient to do the subtraction than the mask.