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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2018-04-05 16:20:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-05 21:36:23 -0700 |
| commit | 55de8b9c60f2f6da9bf5c9144020882d07e62296 (patch) | |
| tree | d77ba189669a3808ac01fbaebf18ddd64e30c807 /mm | |
| parent | 0be70327ec8cf6dd6847cbd8b75ca51be864a6ea (diff) | |
| download | linux-0-day-55de8b9c60f2f6da9bf5c9144020882d07e62296.tar.gz linux-0-day-55de8b9c60f2f6da9bf5c9144020882d07e62296.tar.xz | |
slab: make create_kmalloc_cache() work with 32-bit sizes
KMALLOC_MAX_CACHE_SIZE is 32-bit so is the largest kmalloc cache size.
Christoph said:
:
: Ok SLABs maximum allocation size is limited to 32M (see
: include/linux/slab.h:
:
: #define KMALLOC_SHIFT_HIGH ((MAX_ORDER + PAGE_SHIFT - 1) <= 25 ? \
: (MAX_ORDER + PAGE_SHIFT - 1) : 25)
:
: And SLUB/SLOB pass all larger requests to the page allocator anyways.
Link: http://lkml.kernel.org/r/20180305200730.15812-4-adobriyan@gmail.com
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/slab.h | 8 | ||||
| -rw-r--r-- | mm/slab_common.c | 6 |
2 files changed, 7 insertions, 7 deletions
diff --git a/mm/slab.h b/mm/slab.h index 51813236e7733..c8887965491b9 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -77,7 +77,7 @@ extern struct kmem_cache *kmem_cache; /* A table of kmalloc cache names and sizes */ extern const struct kmalloc_info_struct { const char *name; - unsigned long size; + unsigned int size; } kmalloc_info[]; #ifndef CONFIG_SLOB @@ -93,9 +93,9 @@ struct kmem_cache *kmalloc_slab(size_t, gfp_t); /* Functions provided by the slab allocators */ int __kmem_cache_create(struct kmem_cache *, slab_flags_t flags); -extern struct kmem_cache *create_kmalloc_cache(const char *name, size_t size, - slab_flags_t flags, size_t useroffset, - size_t usersize); +struct kmem_cache *create_kmalloc_cache(const char *name, unsigned int size, + slab_flags_t flags, unsigned int useroffset, + unsigned int usersize); extern void create_boot_cache(struct kmem_cache *, const char *name, size_t size, slab_flags_t flags, size_t useroffset, size_t usersize); diff --git a/mm/slab_common.c b/mm/slab_common.c index d3f4209c297dd..f9afca292858a 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -939,9 +939,9 @@ void __init create_boot_cache(struct kmem_cache *s, const char *name, size_t siz s->refcount = -1; /* Exempt from merging for now */ } -struct kmem_cache *__init create_kmalloc_cache(const char *name, size_t size, - slab_flags_t flags, size_t useroffset, - size_t usersize) +struct kmem_cache *__init create_kmalloc_cache(const char *name, + unsigned int size, slab_flags_t flags, + unsigned int useroffset, unsigned int usersize) { struct kmem_cache *s = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT); |