X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Fgfp.h;h=e8003afeffba340aab45281ab5d4a7689f2ce891;hb=f6e0b239a2657ea8cb67f0d83d0bfdbfd19a481b;hp=2a2153ebfe0b1c4759ea45ba080a17b5902fcaf0;hpb=e53ef38d05dd59ed281a35590e4a5b64d8ff4c52;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 2a2153e..e8003af 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -12,9 +12,6 @@ struct vm_area_struct; * * Zone modifiers (see linux/mmzone.h - low three bits) * - * These may be masked by GFP_ZONEMASK to make allocations with this bit - * set fall back to ZONE_NORMAL. - * * Do not put any conditional on these. If necessary modify the definitions * without the underscores and use the consistently. The definitions here may * be used in bit comparisons. @@ -33,6 +30,9 @@ struct vm_area_struct; * cannot handle allocation failures. * * __GFP_NORETRY: The VM implementation must not retry indefinitely. + * + * __GFP_MOVABLE: Flag that this page will be movable by the page migration + * mechanism or reclaimed */ #define __GFP_WAIT ((__force gfp_t)0x10u) /* Can wait and reschedule? */ #define __GFP_HIGH ((__force gfp_t)0x20u) /* Should access emergency pools? */ @@ -40,24 +40,20 @@ struct vm_area_struct; #define __GFP_FS ((__force gfp_t)0x80u) /* Can call down to low-level FS? */ #define __GFP_COLD ((__force gfp_t)0x100u) /* Cache-cold page required */ #define __GFP_NOWARN ((__force gfp_t)0x200u) /* Suppress page allocation failure warning */ -#define __GFP_REPEAT ((__force gfp_t)0x400u) /* Retry the allocation. Might fail */ -#define __GFP_NOFAIL ((__force gfp_t)0x800u) /* Retry for ever. Cannot fail */ -#define __GFP_NORETRY ((__force gfp_t)0x1000u)/* Do not retry. Might fail */ -#define __GFP_NO_GROW ((__force gfp_t)0x2000u)/* Slab internal usage */ +#define __GFP_REPEAT ((__force gfp_t)0x400u) /* See above */ +#define __GFP_NOFAIL ((__force gfp_t)0x800u) /* See above */ +#define __GFP_NORETRY ((__force gfp_t)0x1000u)/* See above */ #define __GFP_COMP ((__force gfp_t)0x4000u)/* Add compound page metadata */ #define __GFP_ZERO ((__force gfp_t)0x8000u)/* Return zeroed page on success */ #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_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_NO_GROW|__GFP_COMP| \ - __GFP_NOMEMALLOC|__GFP_HARDWALL) - /* 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 */ @@ -65,9 +61,40 @@ 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) +#define GFP_HIGHUSER_MOVABLE (__GFP_WAIT | __GFP_IO | __GFP_FS | \ + __GFP_HARDWALL | __GFP_HIGHMEM | \ + __GFP_MOVABLE) +#define GFP_NOFS_PAGECACHE (__GFP_WAIT | __GFP_IO | __GFP_MOVABLE) +#define GFP_USER_PAGECACHE (__GFP_WAIT | __GFP_IO | __GFP_FS | \ + __GFP_HARDWALL | __GFP_MOVABLE) +#define GFP_HIGHUSER_PAGECACHE (__GFP_WAIT | __GFP_IO | __GFP_FS | \ + __GFP_HARDWALL | __GFP_HIGHMEM | \ + __GFP_MOVABLE) + +#ifdef CONFIG_NUMA +#define GFP_THISNODE (__GFP_THISNODE | __GFP_NOWARN | __GFP_NORETRY) +#else +#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 */ @@ -77,12 +104,37 @@ 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 int gfp_zone(gfp_t gfp) +static inline enum zone_type gfp_zone(gfp_t flags) { - int zone = GFP_ZONEMASK & (__force int) gfp; - BUG_ON(zone >= GFP_ZONETYPES); - return zone; +#ifdef CONFIG_ZONE_DMA + if (flags & __GFP_DMA) + return ZONE_DMA; +#endif +#ifdef CONFIG_ZONE_DMA32 + if (flags & __GFP_DMA32) + return ZONE_DMA32; +#endif + if ((flags & (__GFP_HIGHMEM | __GFP_MOVABLE)) == + (__GFP_HIGHMEM | __GFP_MOVABLE)) + return ZONE_MOVABLE; +#ifdef CONFIG_HIGHMEM + if (flags & __GFP_HIGHMEM) + return ZONE_HIGHMEM; +#endif + return ZONE_NORMAL; } /* @@ -92,20 +144,53 @@ static inline int gfp_zone(gfp_t gfp) * virtual kernel addresses to the allocated page(s). */ +static inline int gfp_zonelist(gfp_t flags) +{ + if (NUMA_BUILD && unlikely(flags & __GFP_THISNODE)) + return 1; + + return 0; +} + /* * We get the zone list from the current node and the gfp_mask. * This zone list contains a maximum of MAXNODES*MAX_NR_ZONES zones. + * There are two zonelists per node, one for all zones with memory and + * one containing just zones from the node the zonelist belongs to. * * For the normal case of non-DISCONTIGMEM systems the NODE_DATA() gets * optimized to &contig_page_data at compile-time. */ +static inline struct zonelist *node_zonelist(int nid, gfp_t flags) +{ + return NODE_DATA(nid)->node_zonelists + gfp_zonelist(flags); +} #ifndef HAVE_ARCH_FREE_PAGE static inline void arch_free_page(struct page *page, int order) { } #endif +#ifndef HAVE_ARCH_ALLOC_PAGE +static inline void arch_alloc_page(struct page *page, int order) { } +#endif + +struct page * +__alloc_pages_internal(gfp_t gfp_mask, unsigned int order, + struct zonelist *zonelist, nodemask_t *nodemask); + +static inline struct page * +__alloc_pages(gfp_t gfp_mask, unsigned int order, + struct zonelist *zonelist) +{ + return __alloc_pages_internal(gfp_mask, order, zonelist, NULL); +} + +static inline struct page * +__alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, + struct zonelist *zonelist, nodemask_t *nodemask) +{ + return __alloc_pages_internal(gfp_mask, order, zonelist, nodemask); +} -extern struct page * -FASTCALL(__alloc_pages(gfp_t, unsigned int, struct zonelist *)); static inline struct page *alloc_pages_node(int nid, gfp_t gfp_mask, unsigned int order) @@ -117,8 +202,7 @@ static inline struct page *alloc_pages_node(int nid, gfp_t gfp_mask, if (nid < 0) nid = numa_node_id(); - return __alloc_pages(gfp_mask, order, - NODE_DATA(nid)->node_zonelists + gfp_zone(gfp_mask)); + return __alloc_pages(gfp_mask, order, node_zonelist(nid, gfp_mask)); } #ifdef CONFIG_NUMA @@ -141,8 +225,11 @@ extern struct page *alloc_page_vma(gfp_t gfp_mask, #endif #define alloc_page(gfp_mask) alloc_pages(gfp_mask, 0) -extern unsigned long FASTCALL(__get_free_pages(gfp_t gfp_mask, unsigned int order)); -extern unsigned long FASTCALL(get_zeroed_page(gfp_t gfp_mask)); +extern unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order); +extern unsigned long get_zeroed_page(gfp_t gfp_mask); + +void *alloc_pages_exact(size_t size, gfp_t gfp_mask); +void free_pages_exact(void *virt, size_t size); #define __get_free_page(gfp_mask) \ __get_free_pages((gfp_mask),0) @@ -150,19 +237,17 @@ extern unsigned long FASTCALL(get_zeroed_page(gfp_t gfp_mask)); #define __get_dma_pages(gfp_mask, order) \ __get_free_pages((gfp_mask) | GFP_DMA,(order)) -extern void FASTCALL(__free_pages(struct page *page, unsigned int order)); -extern void FASTCALL(free_pages(unsigned long addr, unsigned int order)); -extern void FASTCALL(free_hot_page(struct page *page)); -extern void FASTCALL(free_cold_page(struct page *page)); +extern void __free_pages(struct page *page, unsigned int order); +extern void free_pages(unsigned long addr, unsigned int order); +extern void free_hot_page(struct page *page); +extern void free_cold_page(struct page *page); #define __free_page(page) __free_pages((page), 0) #define free_page(addr) free_pages((addr),0) void page_alloc_init(void); -#ifdef CONFIG_NUMA -void drain_node_pages(int node); -#else -static inline void drain_node_pages(int node) { }; -#endif +void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp); +void drain_all_pages(void); +void drain_local_pages(void *dummy); #endif /* __LINUX_GFP_H */