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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-01-16 01:51:39 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-16 02:56:32 +0100
commitc13985fa800312fdcd4c7d67a1f55abcbc2f6b7d (patch)
treec91b57810f05c3f189fb969e912a0cdca6c087f9
parentpage-flags: define behavior SL*B-related flags on compound pages (diff)
downloadlinux-c13985fa800312fdcd4c7d67a1f55abcbc2f6b7d.tar.xz
linux-c13985fa800312fdcd4c7d67a1f55abcbc2f6b7d.zip
page-flags: define behavior of Xen-related flags on compound pages
PG_pinned and PG_savepinned are about page table's pages which are never compound. I'm not so sure about PG_foreign, but it seems we shouldn't see compound pages there too. Let's use PF_NO_COMPOUND for all of them. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Steve Capper <steve.capper@linaro.org> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Jérôme Glisse <jglisse@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/page-flags.h10
1 files changed, 7 insertions, 3 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 29d8805aaa23..6e7c7c66b6ca 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -269,9 +269,13 @@ PAGEFLAG(Active, active, PF_HEAD) __CLEARPAGEFLAG(Active, active, PF_HEAD)
__PAGEFLAG(Slab, slab, PF_NO_TAIL)
__PAGEFLAG(SlobFree, slob_free, PF_NO_TAIL)
PAGEFLAG(Checked, checked, PF_NO_COMPOUND) /* Used by some filesystems */
-PAGEFLAG(Pinned, pinned, PF_ANY) TESTSCFLAG(Pinned, pinned, PF_ANY) /* Xen */
-PAGEFLAG(SavePinned, savepinned, PF_ANY); /* Xen */
-PAGEFLAG(Foreign, foreign, PF_ANY); /* Xen */
+
+/* Xen */
+PAGEFLAG(Pinned, pinned, PF_NO_COMPOUND)
+ TESTSCFLAG(Pinned, pinned, PF_NO_COMPOUND)
+PAGEFLAG(SavePinned, savepinned, PF_NO_COMPOUND);
+PAGEFLAG(Foreign, foreign, PF_NO_COMPOUND);
+
PAGEFLAG(Reserved, reserved, PF_ANY) __CLEARPAGEFLAG(Reserved, reserved, PF_ANY)
PAGEFLAG(SwapBacked, swapbacked, PF_ANY)
__CLEARPAGEFLAG(SwapBacked, swapbacked, PF_ANY)