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author | Christoph Lameter <cl@linux.com> | 2013-01-10 19:14:19 +0000 |
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committer | Pekka Enberg <penberg@kernel.org> | 2013-02-01 12:32:08 +0200 |
commit | 2c59dd6544212faa5ce761920d2251f4152f408d (patch) | |
tree | c2547eb50205b72368e0b4758fc7c9a0111238a5 /mm/slab.c | |
parent | 9e5e8deca74603357626471a9b44f05dea9e32b1 (diff) | |
download | blackbird-obmc-linux-2c59dd6544212faa5ce761920d2251f4152f408d.tar.gz blackbird-obmc-linux-2c59dd6544212faa5ce761920d2251f4152f408d.zip |
slab: Common Kmalloc cache determination
Extract the optimized lookup functions from slub and put them into
slab_common.c. Then make slab use these functions as well.
Joonsoo notes that this fixes some issues with constant folding which
also reduces the code size for slub.
https://lkml.org/lkml/2012/10/20/82
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm/slab.c')
-rw-r--r-- | mm/slab.c | 40 |
1 files changed, 3 insertions, 37 deletions
diff --git a/mm/slab.c b/mm/slab.c index 08ba44f81a28..62629b11df38 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -656,40 +656,6 @@ static inline struct array_cache *cpu_cache_get(struct kmem_cache *cachep) return cachep->array[smp_processor_id()]; } -static inline struct kmem_cache *__find_general_cachep(size_t size, - gfp_t gfpflags) -{ - int i; - -#if DEBUG - /* This happens if someone tries to call - * kmem_cache_create(), or __kmalloc(), before - * the generic caches are initialized. - */ - BUG_ON(kmalloc_caches[INDEX_AC] == NULL); -#endif - if (!size) - return ZERO_SIZE_PTR; - - i = kmalloc_index(size); - - /* - * Really subtle: The last entry with cs->cs_size==ULONG_MAX - * has cs_{dma,}cachep==NULL. Thus no special case - * for large kmalloc calls required. - */ -#ifdef CONFIG_ZONE_DMA - if (unlikely(gfpflags & GFP_DMA)) - return kmalloc_dma_caches[i]; -#endif - return kmalloc_caches[i]; -} - -static struct kmem_cache *kmem_find_general_cachep(size_t size, gfp_t gfpflags) -{ - return __find_general_cachep(size, gfpflags); -} - static size_t slab_mgmt_size(size_t nr_objs, size_t align) { return ALIGN(sizeof(struct slab)+nr_objs*sizeof(kmem_bufctl_t), align); @@ -2426,7 +2392,7 @@ __kmem_cache_create (struct kmem_cache *cachep, unsigned long flags) cachep->reciprocal_buffer_size = reciprocal_value(size); if (flags & CFLGS_OFF_SLAB) { - cachep->slabp_cache = kmem_find_general_cachep(slab_size, 0u); + cachep->slabp_cache = kmalloc_slab(slab_size, 0u); /* * This is a possibility for one of the malloc_sizes caches. * But since we go off slab only for object size greater than @@ -3729,7 +3695,7 @@ __do_kmalloc_node(size_t size, gfp_t flags, int node, unsigned long caller) { struct kmem_cache *cachep; - cachep = kmem_find_general_cachep(size, flags); + cachep = kmalloc_slab(size, flags); if (unlikely(ZERO_OR_NULL_PTR(cachep))) return cachep; return kmem_cache_alloc_node_trace(cachep, flags, node, size); @@ -3774,7 +3740,7 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags, * Then kmalloc uses the uninlined functions instead of the inline * functions. */ - cachep = __find_general_cachep(size, flags); + cachep = kmalloc_slab(size, flags); if (unlikely(ZERO_OR_NULL_PTR(cachep))) return cachep; ret = slab_alloc(cachep, flags, caller); |