Commit 5a8a3c1f authored by Vlastimil Babka's avatar Vlastimil Babka
Browse files

mm, slub: retain no free slabs on partial list with CONFIG_SLUB_TINY 



SLUB will leave a number of slabs on the partial list even if they are
empty, to avoid some slab freeing and reallocation. The goal of
CONFIG_SLUB_TINY is to minimize memory overhead, so set the limits to 0
for immediate slab page freeing.

Signed-off-by: default avatarVlastimil Babka <vbabka@suse.cz>
Acked-by: default avatarRoman Gushchin <roman.gushchin@linux.dev>
Reviewed-by: default avatarHyeonggon Yoo <42.hyeyoo@gmail.com>
Acked-by: default avatarMike Rapoport <rppt@linux.ibm.com>
Reviewed-by: default avatarChristoph Lameter <cl@linux.com>
parent b1a413a3

mm/slub.c

+5 −0
Original line number Diff line number Diff line
@@ -241,6 +241,7 @@ static inline bool kmem_cache_has_cpu_partial(struct kmem_cache *s) 
/* Enable to log cmpxchg failures */

#undef SLUB_DEBUG_CMPXCHG



#ifndef CONFIG_SLUB_TINY

/*

 * Minimum number of partial slabs. These will be left on the partial

 * lists even if they are empty. kmem_cache_shrink may reclaim them.
@@ -253,6 +254,10 @@ static inline bool kmem_cache_has_cpu_partial(struct kmem_cache *s) 
 * sort the partial list by the number of objects in use.

 */

#define MAX_PARTIAL 10

#else

#define MIN_PARTIAL 0

#define MAX_PARTIAL 0

#endif



#define DEBUG_DEFAULT_FLAGS (SLAB_CONSISTENCY_CHECKS | SLAB_RED_ZONE | \

				SLAB_POISON | SLAB_STORE_USER)