diff options
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 66 |
1 files changed, 44 insertions, 22 deletions
@@ -375,14 +375,8 @@ static struct track *get_track(struct kmem_cache *s, void *object, static void set_track(struct kmem_cache *s, void *object, enum track_item alloc, unsigned long addr) { - struct track *p; - - if (s->offset) - p = object + s->offset + sizeof(void *); - else - p = object + s->inuse; + struct track *p = get_track(s, object, alloc); - p += alloc; if (addr) { p->addr = addr; p->cpu = smp_processor_id(); @@ -1336,7 +1330,7 @@ static struct page *get_any_partial(struct kmem_cache *s, gfp_t flags) n = get_node(s, zone_to_nid(zone)); if (n && cpuset_zone_allowed_hardwall(zone, flags) && - n->nr_partial > n->min_partial) { + n->nr_partial > s->min_partial) { page = get_partial_node(n); if (page) return page; @@ -1388,7 +1382,7 @@ static void unfreeze_slab(struct kmem_cache *s, struct page *page, int tail) slab_unlock(page); } else { stat(c, DEACTIVATE_EMPTY); - if (n->nr_partial < n->min_partial) { + if (n->nr_partial < s->min_partial) { /* * Adding an empty slab to the partial slabs in order * to avoid page allocator overhead. This slab needs @@ -1754,7 +1748,7 @@ static __always_inline void slab_free(struct kmem_cache *s, c = get_cpu_slab(s, smp_processor_id()); debug_check_no_locks_freed(object, c->objsize); if (!(s->flags & SLAB_DEBUG_OBJECTS)) - debug_check_no_obj_freed(object, s->objsize); + debug_check_no_obj_freed(object, c->objsize); if (likely(page == c->page && c->node >= 0)) { object[c->offset] = c->freelist; c->freelist = object; @@ -1876,6 +1870,7 @@ static inline int calculate_order(int size) int order; int min_objects; int fraction; + int max_objects; /* * Attempt to find best configuration for a slab. This @@ -1888,6 +1883,9 @@ static inline int calculate_order(int size) min_objects = slub_min_objects; if (!min_objects) min_objects = 4 * (fls(nr_cpu_ids) + 1); + max_objects = (PAGE_SIZE << slub_max_order)/size; + min_objects = min(min_objects, max_objects); + while (min_objects > 1) { fraction = 16; while (fraction >= 4) { @@ -1897,7 +1895,7 @@ static inline int calculate_order(int size) return order; fraction /= 2; } - min_objects /= 2; + min_objects --; } /* @@ -1960,17 +1958,6 @@ static void init_kmem_cache_node(struct kmem_cache_node *n, struct kmem_cache *s) { n->nr_partial = 0; - - /* - * The larger the object size is, the more pages we want on the partial - * list to avoid pounding the page allocator excessively. - */ - n->min_partial = ilog2(s->size); - if (n->min_partial < MIN_PARTIAL) - n->min_partial = MIN_PARTIAL; - else if (n->min_partial > MAX_PARTIAL) - n->min_partial = MAX_PARTIAL; - spin_lock_init(&n->list_lock); INIT_LIST_HEAD(&n->partial); #ifdef CONFIG_SLUB_DEBUG @@ -2213,6 +2200,15 @@ static int init_kmem_cache_nodes(struct kmem_cache *s, gfp_t gfpflags) } #endif +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; +} + /* * calculate_sizes() determines the order and the distribution of data within * a slab object. @@ -2351,6 +2347,11 @@ static int kmem_cache_open(struct kmem_cache *s, gfp_t gfpflags, if (!calculate_sizes(s, -1)) goto error; + /* + * The larger the object size is, the more pages we want on the partial + * list to avoid pounding the page allocator excessively. + */ + set_min_partial(s, ilog2(s->size)); s->refcount = 1; #ifdef CONFIG_NUMA s->remote_node_defrag_ratio = 1000; @@ -3904,6 +3905,26 @@ static ssize_t order_show(struct kmem_cache *s, char *buf) } SLAB_ATTR(order); +static ssize_t min_partial_show(struct kmem_cache *s, char *buf) +{ + return sprintf(buf, "%lu\n", s->min_partial); +} + +static ssize_t min_partial_store(struct kmem_cache *s, const char *buf, + size_t length) +{ + unsigned long min; + int err; + + err = strict_strtoul(buf, 10, &min); + if (err) + return err; + + set_min_partial(s, min); + return length; +} +SLAB_ATTR(min_partial); + static ssize_t ctor_show(struct kmem_cache *s, char *buf) { if (s->ctor) { @@ -4219,6 +4240,7 @@ static struct attribute *slab_attrs[] = { &object_size_attr.attr, &objs_per_slab_attr.attr, &order_attr.attr, + &min_partial_attr.attr, &objects_attr.attr, &objects_partial_attr.attr, &total_objects_attr.attr, |
