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mm, slub: don't create kmalloc-rcl caches with CONFIG_SLUB_TINY

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Distinguishing kmalloc(__GFP_RECLAIMABLE) can help against fragmentation
by grouping pages by mobility, but on tiny systems the extra memory
overhead of separate set of kmalloc-rcl caches will probably be worse,
and mobility grouping likely disabled anyway.

Thus with CONFIG_SLUB_TINY, don't create kmalloc-rcl caches and use the
regular ones.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
This commit is contained in:
Vlastimil Babka
2022-11-15 18:19:28 +01:00
parent 90ce872c22
commit 2f7c1c1396
2 changed files with 15 additions and 4 deletions
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9
include/linux/slab.h
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@@ -336,12 +336,17 @@ enum kmalloc_cache_type {
#endif
#ifndef CONFIG_MEMCG_KMEM
KMALLOC_CGROUP = KMALLOC_NORMAL,
#else
KMALLOC_CGROUP,
#endif
#ifdef CONFIG_SLUB_TINY
KMALLOC_RECLAIM = KMALLOC_NORMAL,
#else
KMALLOC_RECLAIM,
#endif
#ifdef CONFIG_ZONE_DMA
KMALLOC_DMA,
#endif
#ifdef CONFIG_MEMCG_KMEM
KMALLOC_CGROUP,
#endif
NR_KMALLOC_TYPES
};