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| author | Hyeonggon Yoo <42.hyeyoo@gmail.com> | 2022-08-17 19:18:19 +0900 |
|---|---|---|
| committer | Vlastimil Babka <vbabka@suse.cz> | 2022-08-24 16:11:41 +0200 |
| commit | d6a71648dbc0ca5520cba16a8fdce8d37ae74218 (patch) | |
| tree | b15d1f620d72682e4c169024d798307f5792a62d /mm/slab_common.c | |
| parent | c4cab557521a73bd803e5c6f613b4e00bd3c4662 (diff) | |
| download | linux-d6a71648dbc0ca5520cba16a8fdce8d37ae74218.tar.bz2 | |
mm/slab: kmalloc: pass requests larger than order-1 page to page allocator
There is not much benefit for serving large objects in kmalloc().
Let's pass large requests to page allocator like SLUB for better
maintenance of common code.
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Diffstat (limited to 'mm/slab_common.c')
| -rw-r--r-- | mm/slab_common.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c index 51ccd0545816..5a2e81f42ee9 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -744,8 +744,8 @@ struct kmem_cache *kmalloc_slab(size_t size, gfp_t flags) /* * kmalloc_info[] is to make slub_debug=,kmalloc-xx option work at boot time. - * kmalloc_index() supports up to 2^25=32MB, so the final entry of the table is - * kmalloc-32M. + * kmalloc_index() supports up to 2^21=2MB, so the final entry of the table is + * kmalloc-2M. */ const struct kmalloc_info_struct kmalloc_info[] __initconst = { INIT_KMALLOC_INFO(0, 0), @@ -769,11 +769,7 @@ const struct kmalloc_info_struct kmalloc_info[] __initconst = { INIT_KMALLOC_INFO(262144, 256k), INIT_KMALLOC_INFO(524288, 512k), INIT_KMALLOC_INFO(1048576, 1M), - INIT_KMALLOC_INFO(2097152, 2M), - INIT_KMALLOC_INFO(4194304, 4M), - INIT_KMALLOC_INFO(8388608, 8M), - INIT_KMALLOC_INFO(16777216, 16M), - INIT_KMALLOC_INFO(33554432, 32M) + INIT_KMALLOC_INFO(2097152, 2M) }; /* @@ -886,6 +882,21 @@ void __init create_kmalloc_caches(slab_flags_t flags) /* Kmalloc array is now usable */ slab_state = UP; } + +void free_large_kmalloc(struct folio *folio, void *object) +{ + unsigned int order = folio_order(folio); + + if (WARN_ON_ONCE(order == 0)) + pr_warn_once("object pointer: 0x%p\n", object); + + kmemleak_free(object); + kasan_kfree_large(object); + + mod_lruvec_page_state(folio_page(folio, 0), NR_SLAB_UNRECLAIMABLE_B, + -(PAGE_SIZE << order)); + __free_pages(folio_page(folio, 0), order); +} #endif /* !CONFIG_SLOB */ gfp_t kmalloc_fix_flags(gfp_t flags) |