On Tue, 3 Nov 2015 17:26:15 +0200 "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> wrote:
> I've missed two simlar codepath which need some preparation to work well
> with reworked THP refcounting.
>
> Both page_referenced() and page_idle_clear_pte_refs_one() assume that
> THP can only be mapped with PMD, so there's no reason to look on PTEs
> for PageTransHuge() pages. That's no true anymore: THP can be mapped
> with PTEs too.
>
> The patch removes PageTransHuge() test from the functions and opencode
> page table check.
x86_64 allnoconfig:
In file included from mm/rmap.c:47:
include/linux/mm.h: In function 'page_referenced':
include/linux/mm.h:448: error: call to '__compiletime_assert_448' declared with attribute error: BUILD_BUG failed
make[1]: *** [mm/rmap.o] Error 1
make: *** [mm/rmap.o] Error 2
because
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
#define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; })
btw, total_mapcount() is far too large to be inlined and
page_mapcount() is getting pretty bad too.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>