diff options
Diffstat (limited to 'include/linux/gfp.h')
| -rw-r--r-- | include/linux/gfp.h | 62 |
1 files changed, 48 insertions, 14 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h index bc68dd9a6d41..7e93a9ae7064 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; } /* |