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Diffstat (limited to 'include/linux/page-flags.h')
-rw-r--r--include/linux/page-flags.h55
1 files changed, 52 insertions, 3 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index c74d3e87531..b12f93a3c34 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -93,6 +93,11 @@ enum pageflags {
PG_mappedtodisk, /* Has blocks allocated on-disk */
PG_reclaim, /* To be reclaimed asap */
PG_buddy, /* Page is free, on buddy lists */
+ PG_swapbacked, /* Page is backed by RAM/swap */
+#ifdef CONFIG_UNEVICTABLE_LRU
+ PG_unevictable, /* Page is "unevictable" */
+ PG_mlocked, /* Page is vma mlocked */
+#endif
#ifdef CONFIG_IA64_UNCACHED_ALLOCATOR
PG_uncached, /* Page has been mapped as uncached */
#endif
@@ -161,6 +166,18 @@ static inline int Page##uname(struct page *page) \
#define TESTSCFLAG(uname, lname) \
TESTSETFLAG(uname, lname) TESTCLEARFLAG(uname, lname)
+#define SETPAGEFLAG_NOOP(uname) \
+static inline void SetPage##uname(struct page *page) { }
+
+#define CLEARPAGEFLAG_NOOP(uname) \
+static inline void ClearPage##uname(struct page *page) { }
+
+#define __CLEARPAGEFLAG_NOOP(uname) \
+static inline void __ClearPage##uname(struct page *page) { }
+
+#define TESTCLEARFLAG_FALSE(uname) \
+static inline int TestClearPage##uname(struct page *page) { return 0; }
+
struct page; /* forward declaration */
TESTPAGEFLAG(Locked, locked)
@@ -169,6 +186,7 @@ PAGEFLAG(Referenced, referenced) TESTCLEARFLAG(Referenced, referenced)
PAGEFLAG(Dirty, dirty) TESTSCFLAG(Dirty, dirty) __CLEARPAGEFLAG(Dirty, dirty)
PAGEFLAG(LRU, lru) __CLEARPAGEFLAG(LRU, lru)
PAGEFLAG(Active, active) __CLEARPAGEFLAG(Active, active)
+ TESTCLEARFLAG(Active, active)
__PAGEFLAG(Slab, slab)
PAGEFLAG(Checked, checked) /* Used by some filesystems */
PAGEFLAG(Pinned, pinned) TESTSCFLAG(Pinned, pinned) /* Xen */
@@ -176,6 +194,7 @@ PAGEFLAG(SavePinned, savepinned); /* Xen */
PAGEFLAG(Reserved, reserved) __CLEARPAGEFLAG(Reserved, reserved)
PAGEFLAG(Private, private) __CLEARPAGEFLAG(Private, private)
__SETPAGEFLAG(Private, private)
+PAGEFLAG(SwapBacked, swapbacked) __CLEARPAGEFLAG(SwapBacked, swapbacked)
__PAGEFLAG(SlobPage, slob_page)
__PAGEFLAG(SlobFree, slob_free)
@@ -211,6 +230,25 @@ PAGEFLAG(SwapCache, swapcache)
PAGEFLAG_FALSE(SwapCache)
#endif
+#ifdef CONFIG_UNEVICTABLE_LRU
+PAGEFLAG(Unevictable, unevictable) __CLEARPAGEFLAG(Unevictable, unevictable)
+ TESTCLEARFLAG(Unevictable, unevictable)
+
+#define MLOCK_PAGES 1
+PAGEFLAG(Mlocked, mlocked) __CLEARPAGEFLAG(Mlocked, mlocked)
+ TESTSCFLAG(Mlocked, mlocked)
+
+#else
+
+#define MLOCK_PAGES 0
+PAGEFLAG_FALSE(Mlocked)
+ SETPAGEFLAG_NOOP(Mlocked) TESTCLEARFLAG_FALSE(Mlocked)
+
+PAGEFLAG_FALSE(Unevictable) TESTCLEARFLAG_FALSE(Unevictable)
+ SETPAGEFLAG_NOOP(Unevictable) CLEARPAGEFLAG_NOOP(Unevictable)
+ __CLEARPAGEFLAG_NOOP(Unevictable)
+#endif
+
#ifdef CONFIG_IA64_UNCACHED_ALLOCATOR
PAGEFLAG(Uncached, uncached)
#else
@@ -326,15 +364,25 @@ static inline void __ClearPageTail(struct page *page)
#endif /* !PAGEFLAGS_EXTENDED */
+#ifdef CONFIG_UNEVICTABLE_LRU
+#define __PG_UNEVICTABLE (1 << PG_unevictable)
+#define __PG_MLOCKED (1 << PG_mlocked)
+#else
+#define __PG_UNEVICTABLE 0
+#define __PG_MLOCKED 0
+#endif
+
#define PAGE_FLAGS (1 << PG_lru | 1 << PG_private | 1 << PG_locked | \
1 << PG_buddy | 1 << PG_writeback | \
- 1 << PG_slab | 1 << PG_swapcache | 1 << PG_active)
+ 1 << PG_slab | 1 << PG_swapcache | 1 << PG_active | \
+ __PG_UNEVICTABLE | __PG_MLOCKED)
/*
* Flags checked in bad_page(). Pages on the free list should not have
* these flags set. It they are, there is a problem.
*/
-#define PAGE_FLAGS_CLEAR_WHEN_BAD (PAGE_FLAGS | 1 << PG_reclaim | 1 << PG_dirty)
+#define PAGE_FLAGS_CLEAR_WHEN_BAD (PAGE_FLAGS | \
+ 1 << PG_reclaim | 1 << PG_dirty | 1 << PG_swapbacked)
/*
* Flags checked when a page is freed. Pages being freed should not have
@@ -347,7 +395,8 @@ static inline void __ClearPageTail(struct page *page)
* Pages being prepped should not have these flags set. It they are, there
* is a problem.
*/
-#define PAGE_FLAGS_CHECK_AT_PREP (PAGE_FLAGS | 1 << PG_reserved | 1 << PG_dirty)
+#define PAGE_FLAGS_CHECK_AT_PREP (PAGE_FLAGS | \
+ 1 << PG_reserved | 1 << PG_dirty | 1 << PG_swapbacked)
#endif /* !__GENERATING_BOUNDS_H */
#endif /* PAGE_FLAGS_H */