lkml.org 
[lkml]   [2020]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: [PATCH v6 05/51] mm: Simplify PageDoubleMap with PF_SECOND policy
    Date
    On 10 Jun 2020, at 16:12, Matthew Wilcox wrote:

    > From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
    >
    > Introduce the new page policy of PF_SECOND which lets us use the
    > normal pageflags generation machinery to create the various DoubleMap
    > manipulation functions.
    >
    > Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
    > ---
    > include/linux/page-flags.h | 40 ++++++++++----------------------------
    > 1 file changed, 10 insertions(+), 30 deletions(-)
    >
    > diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
    > index de6e0696f55c..979460df4768 100644
    > --- a/include/linux/page-flags.h
    > +++ b/include/linux/page-flags.h
    > @@ -232,6 +232,9 @@ static inline void page_init_poison(struct page *page, size_t size)
    > *
    > * PF_NO_COMPOUND:
    > * the page flag is not relevant for compound pages.
    > + *
    > + * PF_SECOND:
    > + * the page flag is stored in the first tail page.
    > */

    Would PF_FIRST_TAIL or PF_SECOND_IN_COMPOUND be more informative?


    Best Regards,
    Yan Zi
    [unhandled content-type:application/pgp-signature]
    \
     
     \ /
      Last update: 2020-06-11 17:15    [W:3.799 / U:0.192 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site