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slub: make ->inuse unsigned int

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->inuse is "the number of bytes in actual use by the object",
can't be negative.

Link: http://lkml.kernel.org/r/20180305200730.15812-14-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>
This commit is contained in:
Alexey Dobriyan 2018-04-05 16:21:06 -07:00 committed by Linus Torvalds
parent 3a3791ec2e
commit 52ee6d74aa
2 changed files with 3 additions and 4 deletions
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2
include/linux/slub_def.h
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@ -98,7 +98,7 @@ struct kmem_cache {
gfp_t allocflags; /* gfp flags to use on each alloc */ gfp_t allocflags; /* gfp flags to use on each alloc */
int refcount; /* Refcount for slab cache destroy */ int refcount; /* Refcount for slab cache destroy */
void (*ctor)(void *); void (*ctor)(void *);
int inuse; /* Offset to metadata */ unsigned int inuse; /* Offset to metadata */
unsigned int align; /* Alignment */ unsigned int align; /* Alignment */
unsigned int reserved; /* Reserved bytes at the end of slabs */ unsigned int reserved; /* Reserved bytes at the end of slabs */
unsigned int red_left_pad; /* Left redzone padding size */ unsigned int red_left_pad; /* Left redzone padding size */

5
mm/slub.c
View File

@ -4256,12 +4256,11 @@ __kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
* the complete object on kzalloc. * the complete object on kzalloc.
*/ */
s->object_size = max(s->object_size, (int)size); s->object_size = max(s->object_size, (int)size);
s->inuse = max_t(int, s->inuse, ALIGN(size, sizeof(void *))); s->inuse = max(s->inuse, ALIGN(size, sizeof(void *)));
for_each_memcg_cache(c, s) { for_each_memcg_cache(c, s) {
c->object_size = s->object_size; c->object_size = s->object_size;
c->inuse = max_t(int, c->inuse, c->inuse = max(c->inuse, ALIGN(size, sizeof(void *)));
ALIGN(size, sizeof(void *)));
} }
if (sysfs_slab_alias(s, name)) { if (sysfs_slab_alias(s, name)) {