On Sat, 27 Aug 2022 16:59:32 -0700 John Hubbard <jhubbard@xxxxxxxxxx> wrote:
> Anyway, I'll change my patch locally for now, to this:
>
> static inline void dio_w_unpin_user_pages(struct page **pages,
> unsigned long npages)
> {
> /* Careful, release_pages() uses a smaller integer type for npages: */
> if (WARN_ON_ONCE(npages > (unsigned long)INT_MAX))
> return;
>
> release_pages(pages, (int)npages);
> }
Well, it might be slower. release_pages() has a ton of fluff.
As mentioned, the above might be faster if the pages tend
to have page_count()==1??
