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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-01-15 16:51:32 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-15 17:56:32 -0800
commit8cb38fabb6bc1ba8bcec83eaf04848d886b54d28 (patch)
treeed9bed9d1094b0367771af5dbe5da6e431a4946e /include/linux/page-flags.h
parentdf8c94d13c7e30f4471f8faa8d544809a0e52865 (diff)
page-flags: define behavior of LRU-related flags on compound pages
Only head pages are ever on LRU. Let's use PF_HEAD policy to avoid any confusion for all LRU-related flags. 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>
Diffstat (limited to 'include/linux/page-flags.h')
-rw-r--r--include/linux/page-flags.h17
1 files changed, 9 insertions, 8 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 2493f80b949b..88a3bcba57d6 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -258,13 +258,14 @@ static inline int __TestClearPage##uname(struct page *page) { return 0; }
__PAGEFLAG(Locked, locked, PF_NO_TAIL)
PAGEFLAG(Error, error, PF_NO_COMPOUND) TESTCLEARFLAG(Error, error, PF_NO_COMPOUND)
-PAGEFLAG(Referenced, referenced, PF_ANY) TESTCLEARFLAG(Referenced, referenced, PF_ANY)
- __SETPAGEFLAG(Referenced, referenced, PF_ANY)
+PAGEFLAG(Referenced, referenced, PF_HEAD)
+ TESTCLEARFLAG(Referenced, referenced, PF_HEAD)
+ __SETPAGEFLAG(Referenced, referenced, PF_HEAD)
PAGEFLAG(Dirty, dirty, PF_HEAD) TESTSCFLAG(Dirty, dirty, PF_HEAD)
__CLEARPAGEFLAG(Dirty, dirty, PF_HEAD)
-PAGEFLAG(LRU, lru, PF_ANY) __CLEARPAGEFLAG(LRU, lru, PF_ANY)
-PAGEFLAG(Active, active, PF_ANY) __CLEARPAGEFLAG(Active, active, PF_ANY)
- TESTCLEARFLAG(Active, active, PF_ANY)
+PAGEFLAG(LRU, lru, PF_HEAD) __CLEARPAGEFLAG(LRU, lru, PF_HEAD)
+PAGEFLAG(Active, active, PF_HEAD) __CLEARPAGEFLAG(Active, active, PF_HEAD)
+ TESTCLEARFLAG(Active, active, PF_HEAD)
__PAGEFLAG(Slab, slab, PF_ANY)
PAGEFLAG(Checked, checked, PF_NO_COMPOUND) /* Used by some filesystems */
PAGEFLAG(Pinned, pinned, PF_ANY) TESTSCFLAG(Pinned, pinned, PF_ANY) /* Xen */
@@ -318,9 +319,9 @@ PAGEFLAG(SwapCache, swapcache, PF_ANY)
PAGEFLAG_FALSE(SwapCache)
#endif
-PAGEFLAG(Unevictable, unevictable, PF_ANY)
- __CLEARPAGEFLAG(Unevictable, unevictable, PF_ANY)
- TESTCLEARFLAG(Unevictable, unevictable, PF_ANY)
+PAGEFLAG(Unevictable, unevictable, PF_HEAD)
+ __CLEARPAGEFLAG(Unevictable, unevictable, PF_HEAD)
+ TESTCLEARFLAG(Unevictable, unevictable, PF_HEAD)
#ifdef CONFIG_MMU
PAGEFLAG(Mlocked, mlocked, PF_ANY) __CLEARPAGEFLAG(Mlocked, mlocked, PF_ANY)