diff options
Diffstat (limited to 'mm/slab.c')
| -rw-r--r-- | mm/slab.c | 108 |
1 files changed, 24 insertions, 84 deletions
diff --git a/mm/slab.c b/mm/slab.c index 744ab9a665a2..f257d4dd474d 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -114,6 +114,7 @@ #include <linux/rtmutex.h> #include <linux/reciprocal_div.h> #include <linux/debugobjects.h> +#include <linux/kmemcheck.h> #include <asm/cacheflush.h> #include <asm/tlbflush.h> @@ -179,13 +180,13 @@ SLAB_STORE_USER | \ SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \ SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \ - SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE) + SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE | SLAB_NOTRACK) #else # define CREATE_MASK (SLAB_HWCACHE_ALIGN | \ SLAB_CACHE_DMA | \ SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \ SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \ - SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE) + SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE | SLAB_NOTRACK) #endif /* @@ -380,87 +381,6 @@ static void kmem_list3_init(struct kmem_list3 *parent) MAKE_LIST((cachep), (&(ptr)->slabs_free), slabs_free, nodeid); \ } while (0) -/* - * struct kmem_cache - * - * manages a cache. - */ - -struct kmem_cache { -/* 1) per-cpu data, touched during every alloc/free */ - struct array_cache *array[NR_CPUS]; -/* 2) Cache tunables. Protected by cache_chain_mutex */ - unsigned int batchcount; - unsigned int limit; - unsigned int shared; - - unsigned int buffer_size; - u32 reciprocal_buffer_size; -/* 3) touched by every alloc & free from the backend */ - - unsigned int flags; /* constant flags */ - unsigned int num; /* # of objs per slab */ - -/* 4) cache_grow/shrink */ - /* order of pgs per slab (2^n) */ - unsigned int gfporder; - - /* force GFP flags, e.g. GFP_DMA */ - gfp_t gfpflags; - - size_t colour; /* cache colouring range */ - unsigned int colour_off; /* colour offset */ - struct kmem_cache *slabp_cache; - unsigned int slab_size; - unsigned int dflags; /* dynamic flags */ - - /* constructor func */ - void (*ctor)(void *obj); - -/* 5) cache creation/removal */ - const char *name; - struct list_head next; - -/* 6) statistics */ -#if STATS - unsigned long num_active; - unsigned long num_allocations; - unsigned long high_mark; - unsigned long grown; - unsigned long reaped; - unsigned long errors; - unsigned long max_freeable; - unsigned long node_allocs; - unsigned long node_frees; - unsigned long node_overflow; - atomic_t allochit; - atomic_t allocmiss; - atomic_t freehit; - atomic_t freemiss; -#endif -#if DEBUG - /* - * If debugging is enabled, then the allocator can add additional - * fields and/or padding to every object. buffer_size contains the total - * object size including these internal fields, the following two - * variables contain the offset to the user object and its size. - */ - int obj_offset; - int obj_size; -#endif - /* - * We put nodelists[] at the end of kmem_cache, because we want to size - * this array to nr_node_ids slots instead of MAX_NUMNODES - * (see kmem_cache_init()) - * We still use [MAX_NUMNODES] and not [1] or [0] because cache_cache - * is statically defined, so we reserve the max number of nodes. - */ - struct kmem_list3 *nodelists[MAX_NUMNODES]; - /* - * Do not add fields after nodelists[] - */ -}; - #define CFLGS_OFF_SLAB (0x80000000UL) #define OFF_SLAB(x) ((x)->flags & CFLGS_OFF_SLAB) @@ -1704,7 +1624,7 @@ static void *kmem_getpages(struct kmem_cache *cachep, gfp_t flags, int nodeid) if (cachep->flags & SLAB_RECLAIM_ACCOUNT) flags |= __GFP_RECLAIMABLE; - page = alloc_pages_exact_node(nodeid, flags, cachep->gfporder); + page = alloc_pages_exact_node(nodeid, flags | __GFP_NOTRACK, cachep->gfporder); if (!page) return NULL; @@ -1717,6 +1637,16 @@ static void *kmem_getpages(struct kmem_cache *cachep, gfp_t flags, int nodeid) NR_SLAB_UNRECLAIMABLE, nr_pages); for (i = 0; i < nr_pages; i++) __SetPageSlab(page + i); + + if (kmemcheck_enabled && !(cachep->flags & SLAB_NOTRACK)) { + kmemcheck_alloc_shadow(page, cachep->gfporder, flags, nodeid); + + if (cachep->ctor) + kmemcheck_mark_uninitialized_pages(page, nr_pages); + else + kmemcheck_mark_unallocated_pages(page, nr_pages); + } + return page_address(page); } @@ -1729,6 +1659,8 @@ static void kmem_freepages(struct kmem_cache *cachep, void *addr) struct page *page = virt_to_page(addr); const unsigned long nr_freed = i; + kmemcheck_free_shadow(page, cachep->gfporder); + if (cachep->flags & SLAB_RECLAIM_ACCOUNT) sub_zone_page_state(page_zone(page), NR_SLAB_RECLAIMABLE, nr_freed); @@ -3404,6 +3336,9 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid, kmemleak_alloc_recursive(ptr, obj_size(cachep), 1, cachep->flags, flags); + if (likely(ptr)) + kmemcheck_slab_alloc(cachep, flags, ptr, obj_size(cachep)); + if (unlikely((flags & __GFP_ZERO) && ptr)) memset(ptr, 0, obj_size(cachep)); @@ -3464,6 +3399,9 @@ __cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller) flags); prefetchw(objp); + if (likely(objp)) + kmemcheck_slab_alloc(cachep, flags, objp, obj_size(cachep)); + if (unlikely((flags & __GFP_ZERO) && objp)) memset(objp, 0, obj_size(cachep)); @@ -3580,6 +3518,8 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp) kmemleak_free_recursive(objp, cachep->flags); objp = cache_free_debugcheck(cachep, objp, __builtin_return_address(0)); + kmemcheck_slab_free(cachep, objp, obj_size(cachep)); + /* * Skip calling cache_free_alien() when the platform is not numa. * This will avoid cache misses that happen while accessing slabp (which |