Re: [PATCH 0/6] Allocate and free frozen pages

[William Kucharski <william.kucharski@oracle.com>]

For the series:

Reviewed-by: William Kucharski <william.kucharski@oracle.com>

> On May 31, 2022, at 9:06 AM, Matthew Wilcox (Oracle) <willy@infradead.org> wrote:
> 
> We already have the ability to freeze a page (safely reduce its
> reference count to 0).  Some users (eg slab) would prefer to be able
> to allocate frozen pages and avoid touching the refcount.  It also
> avoids spurious temporary refcounts being taken on these pages.
> 
> Matthew Wilcox (Oracle) (6):
>  mm/page_alloc: Remove zone parameter from free_one_page()
>  mm/page_alloc: Rename free_the_page() to free_frozen_pages()
>  mm/page_alloc: Export free_frozen_pages() instead of free_unref_page()
>  mm/page_alloc: Add alloc_frozen_pages()
>  slab: Allocate frozen pages
>  slub: Allocate frozen pages
> 
> mm/internal.h   | 15 ++++++++++--
> mm/mempolicy.c  | 61 ++++++++++++++++++++++++++++++-------------------
> mm/page_alloc.c | 59 +++++++++++++++++++++++++++--------------------
> mm/slab.c       | 23 +++++++++----------
> mm/slub.c       | 26 ++++++++++-----------
> mm/swap.c       |  2 +-
> 6 files changed, 110 insertions(+), 76 deletions(-)
> 
> -- 
> 2.34.1
> 
>