On Fri, Jan 31, 2020 at 07:40:26PM -0800, John Hubbard wrote: > As part of pin_user_pages() and related API calls, pages are > "dma-pinned". For the case of compound pages of order > 1, the per-page > accounting of dma pins is accomplished via the 3rd struct page in the > compound page. In order to support debugging of any pin_user_pages()- > related problems, enhance dump_page() so as to report the pin count > in that case. > > Documentation/core-api/pin_user_pages.rst is also updated accordingly. > > Signed-off-by: John Hubbard <jhubbard@xxxxxxxxxx> Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> -- Kirill A. Shutemov
