diff options
| author | Hyeonggon Yoo <42.hyeyoo@gmail.com> | 2022-03-07 07:40:55 +0000 |
|---|---|---|
| committer | Vlastimil Babka <vbabka@suse.cz> | 2022-03-09 12:25:18 +0100 |
| commit | 5182f3c9180397b16d15981b385ecfad9249e527 (patch) | |
| tree | b774fdc78d5cdb3a25dd85c1e7aa402d9e6aa2c6 /mm/slub.c | |
| parent | ffb217a13a2eaf6d5bd974fc83036a53ca69f1e2 (diff) | |
mm/slub: limit number of node partial slabs only in cache creation
SLUB sets number of minimum partial slabs for node (min_partial)
using set_min_partial(). SLUB holds at least min_partial slabs even if
they're empty to avoid excessive use of page allocator.
set_min_partial() limits value of min_partial limits value of
min_partial MIN_PARTIAL and MAX_PARTIAL. As set_min_partial() can be
called by min_partial_store() too, Only limit value of min_partial
in kmem_cache_open() so that it can be changed to value that a user wants.
[ rientjes@google.com: Fold set_min_partial() into its callers ]
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Link: https://lore.kernel.org/r/20220307074057.902222-2-42.hyeyoo@gmail.com
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/mm/slub.c b/mm/slub.c index 261474092e43..1ce09b0347ad 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -4000,15 +4000,6 @@ static int init_kmem_cache_nodes(struct kmem_cache *s) return 1; } -static void set_min_partial(struct kmem_cache *s, unsigned long min) -{ - if (min < MIN_PARTIAL) - min = MIN_PARTIAL; - else if (min > MAX_PARTIAL) - min = MAX_PARTIAL; - s->min_partial = min; -} - static void set_cpu_partial(struct kmem_cache *s) { #ifdef CONFIG_SLUB_CPU_PARTIAL @@ -4215,7 +4206,8 @@ static int kmem_cache_open(struct kmem_cache *s, slab_flags_t flags) * The larger the object size is, the more slabs we want on the partial * list to avoid pounding the page allocator excessively. */ - set_min_partial(s, ilog2(s->size) / 2); + s->min_partial = min_t(unsigned long, MAX_PARTIAL, ilog2(s->size) / 2); + s->min_partial = max_t(unsigned long, MIN_PARTIAL, s->min_partial); set_cpu_partial(s); @@ -5396,7 +5388,7 @@ static ssize_t min_partial_store(struct kmem_cache *s, const char *buf, if (err) return err; - set_min_partial(s, min); + s->min_partial = min; return length; } SLAB_ATTR(min_partial); |