diff options
Diffstat (limited to 'include/linux/gfp.h')
| -rw-r--r-- | include/linux/gfp.h | 132 |
1 files changed, 77 insertions, 55 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h index b0fe9f62d15b..51ef13ed756e 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -7,11 +7,16 @@ #include <linux/mmzone.h> #include <linux/topology.h> #include <linux/alloc_tag.h> +#include <linux/cleanup.h> #include <linux/sched.h> struct vm_area_struct; struct mempolicy; +/* Helper macro to avoid gfp flags if they are the default one */ +#define __default_gfp(a,b,...) b +#define default_gfp(...) __default_gfp(,##__VA_ARGS__,GFP_KERNEL) + /* Convert GFP flags to their corresponding migrate type */ #define GFP_MOVABLE_MASK (__GFP_RECLAIMABLE|__GFP_MOVABLE) #define GFP_MOVABLE_SHIFT 3 @@ -39,6 +44,25 @@ static inline bool gfpflags_allow_blocking(const gfp_t gfp_flags) return !!(gfp_flags & __GFP_DIRECT_RECLAIM); } +static inline bool gfpflags_allow_spinning(const gfp_t gfp_flags) +{ + /* + * !__GFP_DIRECT_RECLAIM -> direct claim is not allowed. + * !__GFP_KSWAPD_RECLAIM -> it's not safe to wake up kswapd. + * All GFP_* flags including GFP_NOWAIT use one or both flags. + * alloc_pages_nolock() is the only API that doesn't specify either flag. + * + * This is stronger than GFP_NOWAIT or GFP_ATOMIC because + * those are guaranteed to never block on a sleeping lock. + * Here we are enforcing that the allocation doesn't ever spin + * on any locks (i.e. only trylocks). There is no high level + * GFP_$FOO flag for this use in alloc_pages_nolock() as the + * regular page allocator doesn't fully support this + * allocation mode. + */ + return !!(gfp_flags & __GFP_RECLAIM); +} + #ifdef CONFIG_HIGHMEM #define OPT_ZONE_HIGHMEM ZONE_HIGHMEM #else @@ -212,35 +236,31 @@ struct folio *__folio_alloc_noprof(gfp_t gfp, unsigned int order, int preferred_ unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, nodemask_t *nodemask, int nr_pages, - struct list_head *page_list, struct page **page_array); #define __alloc_pages_bulk(...) alloc_hooks(alloc_pages_bulk_noprof(__VA_ARGS__)) -unsigned long alloc_pages_bulk_array_mempolicy_noprof(gfp_t gfp, +unsigned long alloc_pages_bulk_mempolicy_noprof(gfp_t gfp, unsigned long nr_pages, struct page **page_array); -#define alloc_pages_bulk_array_mempolicy(...) \ - alloc_hooks(alloc_pages_bulk_array_mempolicy_noprof(__VA_ARGS__)) +#define alloc_pages_bulk_mempolicy(...) \ + alloc_hooks(alloc_pages_bulk_mempolicy_noprof(__VA_ARGS__)) /* Bulk allocate order-0 pages */ -#define alloc_pages_bulk_list(_gfp, _nr_pages, _list) \ - __alloc_pages_bulk(_gfp, numa_mem_id(), NULL, _nr_pages, _list, NULL) - -#define alloc_pages_bulk_array(_gfp, _nr_pages, _page_array) \ - __alloc_pages_bulk(_gfp, numa_mem_id(), NULL, _nr_pages, NULL, _page_array) +#define alloc_pages_bulk(_gfp, _nr_pages, _page_array) \ + __alloc_pages_bulk(_gfp, numa_mem_id(), NULL, _nr_pages, _page_array) static inline unsigned long -alloc_pages_bulk_array_node_noprof(gfp_t gfp, int nid, unsigned long nr_pages, +alloc_pages_bulk_node_noprof(gfp_t gfp, int nid, unsigned long nr_pages, struct page **page_array) { if (nid == NUMA_NO_NODE) nid = numa_mem_id(); - return alloc_pages_bulk_noprof(gfp, nid, NULL, nr_pages, NULL, page_array); + return alloc_pages_bulk_noprof(gfp, nid, NULL, nr_pages, page_array); } -#define alloc_pages_bulk_array_node(...) \ - alloc_hooks(alloc_pages_bulk_array_node_noprof(__VA_ARGS__)) +#define alloc_pages_bulk_node(...) \ + alloc_hooks(alloc_pages_bulk_node_noprof(__VA_ARGS__)) static inline void warn_if_node_offline(int this_node, gfp_t gfp_mask) { @@ -300,8 +320,6 @@ static inline struct page *alloc_pages_node_noprof(int nid, gfp_t gfp_mask, #ifdef CONFIG_NUMA struct page *alloc_pages_noprof(gfp_t gfp, unsigned int order); -struct page *alloc_pages_mpol_noprof(gfp_t gfp, unsigned int order, - struct mempolicy *mpol, pgoff_t ilx, int nid); struct folio *folio_alloc_noprof(gfp_t gfp, unsigned int order); struct folio *folio_alloc_mpol_noprof(gfp_t gfp, unsigned int order, struct mempolicy *mpol, pgoff_t ilx, int nid); @@ -312,11 +330,6 @@ static inline struct page *alloc_pages_noprof(gfp_t gfp_mask, unsigned int order { return alloc_pages_node_noprof(numa_node_id(), gfp_mask, order); } -static inline struct page *alloc_pages_mpol_noprof(gfp_t gfp, unsigned int order, - struct mempolicy *mpol, pgoff_t ilx, int nid) -{ - return alloc_pages_noprof(gfp, order); -} static inline struct folio *folio_alloc_noprof(gfp_t gfp, unsigned int order) { return __folio_alloc_node_noprof(gfp, order, numa_node_id()); @@ -326,12 +339,14 @@ static inline struct folio *folio_alloc_mpol_noprof(gfp_t gfp, unsigned int orde { return folio_alloc_noprof(gfp, order); } -#define vma_alloc_folio_noprof(gfp, order, vma, addr) \ - folio_alloc_noprof(gfp, order) +static inline struct folio *vma_alloc_folio_noprof(gfp_t gfp, int order, + struct vm_area_struct *vma, unsigned long addr) +{ + return folio_alloc_noprof(gfp, order); +} #endif #define alloc_pages(...) alloc_hooks(alloc_pages_noprof(__VA_ARGS__)) -#define alloc_pages_mpol(...) alloc_hooks(alloc_pages_mpol_noprof(__VA_ARGS__)) #define folio_alloc(...) alloc_hooks(folio_alloc_noprof(__VA_ARGS__)) #define folio_alloc_mpol(...) alloc_hooks(folio_alloc_mpol_noprof(__VA_ARGS__)) #define vma_alloc_folio(...) alloc_hooks(vma_alloc_folio_noprof(__VA_ARGS__)) @@ -347,6 +362,9 @@ static inline struct page *alloc_page_vma_noprof(gfp_t gfp, } #define alloc_page_vma(...) alloc_hooks(alloc_page_vma_noprof(__VA_ARGS__)) +struct page *alloc_pages_nolock_noprof(gfp_t gfp_flags, int nid, unsigned int order); +#define alloc_pages_nolock(...) alloc_hooks(alloc_pages_nolock_noprof(__VA_ARGS__)) + extern unsigned long get_free_pages_noprof(gfp_t gfp_mask, unsigned int order); #define __get_free_pages(...) alloc_hooks(get_free_pages_noprof(__VA_ARGS__)) @@ -369,13 +387,14 @@ __meminit void *alloc_pages_exact_nid_noprof(int nid, size_t size, gfp_t gfp_mas __get_free_pages((gfp_mask) | GFP_DMA, (order)) extern void __free_pages(struct page *page, unsigned int order); +extern void free_pages_nolock(struct page *page, unsigned int order); extern void free_pages(unsigned long addr, unsigned int order); #define __free_page(page) __free_pages((page), 0) #define free_page(addr) free_pages((addr), 0) void page_alloc_init_cpuhp(void); -int decay_pcp_high(struct zone *zone, struct per_cpu_pages *pcp); +bool decay_pcp_high(struct zone *zone, struct per_cpu_pages *pcp); void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp); void drain_all_pages(struct zone *zone); void drain_local_pages(struct zone *zone); @@ -395,9 +414,15 @@ extern gfp_t gfp_allowed_mask; /* Returns true if the gfp_mask allows use of ALLOC_NO_WATERMARK */ bool gfp_pfmemalloc_allowed(gfp_t gfp_mask); +/* A helper for checking if gfp includes all the specified flags */ +static inline bool gfp_has_flags(gfp_t gfp, gfp_t flags) +{ + return (gfp & flags) == flags; +} + static inline bool gfp_has_io_fs(gfp_t gfp) { - return (gfp & (__GFP_IO | __GFP_FS)) == (__GFP_IO | __GFP_FS); + return gfp_has_flags(gfp, __GFP_IO | __GFP_FS); } /* @@ -412,39 +437,36 @@ static inline bool gfp_compaction_allowed(gfp_t gfp_mask) extern gfp_t vma_thp_gfp_mask(struct vm_area_struct *vma); #ifdef CONFIG_CONTIG_ALLOC -/* The below functions must be run on a range from a single zone. */ -extern int alloc_contig_range_noprof(unsigned long start, unsigned long end, - unsigned migratetype, gfp_t gfp_mask); -#define alloc_contig_range(...) alloc_hooks(alloc_contig_range_noprof(__VA_ARGS__)) -extern struct page *alloc_contig_pages_noprof(unsigned long nr_pages, gfp_t gfp_mask, - int nid, nodemask_t *nodemask); -#define alloc_contig_pages(...) alloc_hooks(alloc_contig_pages_noprof(__VA_ARGS__)) +typedef unsigned int __bitwise acr_flags_t; +#define ACR_FLAGS_NONE ((__force acr_flags_t)0) // ordinary allocation request +#define ACR_FLAGS_CMA ((__force acr_flags_t)BIT(0)) // allocate for CMA -#endif +/* The below functions must be run on a range from a single zone. */ +int alloc_contig_frozen_range_noprof(unsigned long start, unsigned long end, + acr_flags_t alloc_flags, gfp_t gfp_mask); +#define alloc_contig_frozen_range(...) \ + alloc_hooks(alloc_contig_frozen_range_noprof(__VA_ARGS__)) + +int alloc_contig_range_noprof(unsigned long start, unsigned long end, + acr_flags_t alloc_flags, gfp_t gfp_mask); +#define alloc_contig_range(...) \ + alloc_hooks(alloc_contig_range_noprof(__VA_ARGS__)) + +struct page *alloc_contig_frozen_pages_noprof(unsigned long nr_pages, + gfp_t gfp_mask, int nid, nodemask_t *nodemask); +#define alloc_contig_frozen_pages(...) \ + alloc_hooks(alloc_contig_frozen_pages_noprof(__VA_ARGS__)) + +struct page *alloc_contig_pages_noprof(unsigned long nr_pages, gfp_t gfp_mask, + int nid, nodemask_t *nodemask); +#define alloc_contig_pages(...) \ + alloc_hooks(alloc_contig_pages_noprof(__VA_ARGS__)) + +void free_contig_frozen_range(unsigned long pfn, unsigned long nr_pages); void free_contig_range(unsigned long pfn, unsigned long nr_pages); - -#ifdef CONFIG_CONTIG_ALLOC -static inline struct folio *folio_alloc_gigantic_noprof(int order, gfp_t gfp, - int nid, nodemask_t *node) -{ - struct page *page; - - if (WARN_ON(!order || !(gfp & __GFP_COMP))) - return NULL; - - page = alloc_contig_pages_noprof(1 << order, gfp, nid, node); - - return page ? page_folio(page) : NULL; -} -#else -static inline struct folio *folio_alloc_gigantic_noprof(int order, gfp_t gfp, - int nid, nodemask_t *node) -{ - return NULL; -} #endif -/* This should be paired with folio_put() rather than free_contig_range(). */ -#define folio_alloc_gigantic(...) alloc_hooks(folio_alloc_gigantic_noprof(__VA_ARGS__)) + +DEFINE_FREE(free_page, void *, free_page((unsigned long)_T)) #endif /* __LINUX_GFP_H */ |