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-rw-r--r--include/linux/gfp.h62
1 files changed, 48 insertions, 14 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index bc68dd9a6d4..7e93a9ae706 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -48,18 +48,12 @@ struct vm_area_struct;
#define __GFP_NOMEMALLOC ((__force gfp_t)0x10000u) /* Don't use emergency reserves */
#define __GFP_HARDWALL ((__force gfp_t)0x20000u) /* Enforce hardwall cpuset memory allocs */
#define __GFP_THISNODE ((__force gfp_t)0x40000u)/* No fallback, no policies */
-#define __GFP_MOVABLE ((__force gfp_t)0x80000u) /* Page is movable */
+#define __GFP_RECLAIMABLE ((__force gfp_t)0x80000u) /* Page is reclaimable */
+#define __GFP_MOVABLE ((__force gfp_t)0x100000u) /* Page is movable */
-#define __GFP_BITS_SHIFT 20 /* Room for 20 __GFP_FOO bits */
+#define __GFP_BITS_SHIFT 21 /* Room for 21 __GFP_FOO bits */
#define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1))
-/* if you forget to add the bitmask here kernel will crash, period */
-#define GFP_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS| \
- __GFP_COLD|__GFP_NOWARN|__GFP_REPEAT| \
- __GFP_NOFAIL|__GFP_NORETRY|__GFP_COMP| \
- __GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_THISNODE| \
- __GFP_MOVABLE)
-
/* This equals 0, but use constants in case they ever change */
#define GFP_NOWAIT (GFP_ATOMIC & ~__GFP_HIGH)
/* GFP_ATOMIC means both !wait (__GFP_WAIT not set) and use emergency pool */
@@ -67,6 +61,8 @@ struct vm_area_struct;
#define GFP_NOIO (__GFP_WAIT)
#define GFP_NOFS (__GFP_WAIT | __GFP_IO)
#define GFP_KERNEL (__GFP_WAIT | __GFP_IO | __GFP_FS)
+#define GFP_TEMPORARY (__GFP_WAIT | __GFP_IO | __GFP_FS | \
+ __GFP_RECLAIMABLE)
#define GFP_USER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL)
#define GFP_HIGHUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL | \
__GFP_HIGHMEM)
@@ -86,6 +82,19 @@ struct vm_area_struct;
#define GFP_THISNODE ((__force gfp_t)0)
#endif
+/* This mask makes up all the page movable related flags */
+#define GFP_MOVABLE_MASK (__GFP_RECLAIMABLE|__GFP_MOVABLE)
+
+/* Control page allocator reclaim behavior */
+#define GFP_RECLAIM_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS|\
+ __GFP_NOWARN|__GFP_REPEAT|__GFP_NOFAIL|\
+ __GFP_NORETRY|__GFP_NOMEMALLOC)
+
+/* Control allocation constraints */
+#define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE)
+
+/* Do not use these with a slab allocator */
+#define GFP_SLAB_BUG_MASK (__GFP_DMA32|__GFP_HIGHMEM|~__GFP_BITS_MASK)
/* Flag - indicates that the buffer will be suitable for DMA. Ignored on some
platforms, used as appropriate on others */
@@ -95,25 +104,50 @@ struct vm_area_struct;
/* 4GB DMA on some platforms */
#define GFP_DMA32 __GFP_DMA32
+/* Convert GFP flags to their corresponding migrate type */
+static inline int allocflags_to_migratetype(gfp_t gfp_flags)
+{
+ WARN_ON((gfp_flags & GFP_MOVABLE_MASK) == GFP_MOVABLE_MASK);
+
+ if (unlikely(page_group_by_mobility_disabled))
+ return MIGRATE_UNMOVABLE;
+
+ /* Group based on mobility */
+ return (((gfp_flags & __GFP_MOVABLE) != 0) << 1) |
+ ((gfp_flags & __GFP_RECLAIMABLE) != 0);
+}
static inline enum zone_type gfp_zone(gfp_t flags)
{
+ int base = 0;
+
+#ifdef CONFIG_NUMA
+ if (flags & __GFP_THISNODE)
+ base = MAX_NR_ZONES;
+#endif
+
#ifdef CONFIG_ZONE_DMA
if (flags & __GFP_DMA)
- return ZONE_DMA;
+ return base + ZONE_DMA;
#endif
#ifdef CONFIG_ZONE_DMA32
if (flags & __GFP_DMA32)
- return ZONE_DMA32;
+ return base + ZONE_DMA32;
#endif
if ((flags & (__GFP_HIGHMEM | __GFP_MOVABLE)) ==
(__GFP_HIGHMEM | __GFP_MOVABLE))
- return ZONE_MOVABLE;
+ return base + ZONE_MOVABLE;
#ifdef CONFIG_HIGHMEM
if (flags & __GFP_HIGHMEM)
- return ZONE_HIGHMEM;
+ return base + ZONE_HIGHMEM;
#endif
- return ZONE_NORMAL;
+ return base + ZONE_NORMAL;
+}
+
+static inline gfp_t set_migrateflags(gfp_t gfp, gfp_t migrate_flags)
+{
+ BUG_ON((gfp & GFP_MOVABLE_MASK) == GFP_MOVABLE_MASK);
+ return (gfp & ~(GFP_MOVABLE_MASK)) | migrate_flags;
}
/*