diff options
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 58 |
1 files changed, 36 insertions, 22 deletions
diff --git a/mm/slub.c b/mm/slub.c index 7f4bc7027ed5..8addc535bcdc 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1687,7 +1687,7 @@ static void rcu_free_slab(struct rcu_head *h) static void free_slab(struct kmem_cache *s, struct page *page) { - if (unlikely(s->flags & SLAB_DESTROY_BY_RCU)) { + if (unlikely(s->flags & SLAB_TYPESAFE_BY_RCU)) { struct rcu_head *head; if (need_reserve_slab_rcu) { @@ -2963,7 +2963,7 @@ static __always_inline void slab_free(struct kmem_cache *s, struct page *page, * slab_free_freelist_hook() could have put the items into quarantine. * If so, no need to free them. */ - if (s->flags & SLAB_KASAN && !(s->flags & SLAB_DESTROY_BY_RCU)) + if (s->flags & SLAB_KASAN && !(s->flags & SLAB_TYPESAFE_BY_RCU)) return; do_slab_free(s, page, head, tail, cnt, addr); } @@ -3433,7 +3433,7 @@ static int calculate_sizes(struct kmem_cache *s, int forced_order) * the slab may touch the object after free or before allocation * then we should never poison the object itself. */ - if ((flags & SLAB_POISON) && !(flags & SLAB_DESTROY_BY_RCU) && + if ((flags & SLAB_POISON) && !(flags & SLAB_TYPESAFE_BY_RCU) && !s->ctor) s->flags |= __OBJECT_POISON; else @@ -3455,7 +3455,7 @@ static int calculate_sizes(struct kmem_cache *s, int forced_order) */ s->inuse = size; - if (((flags & (SLAB_DESTROY_BY_RCU | SLAB_POISON)) || + if (((flags & (SLAB_TYPESAFE_BY_RCU | SLAB_POISON)) || s->ctor)) { /* * Relocate free pointer after the object if it is not @@ -3537,7 +3537,7 @@ static int kmem_cache_open(struct kmem_cache *s, unsigned long flags) s->flags = kmem_cache_flags(s->size, flags, s->name, s->ctor); s->reserved = 0; - if (need_reserve_slab_rcu && (s->flags & SLAB_DESTROY_BY_RCU)) + if (need_reserve_slab_rcu && (s->flags & SLAB_TYPESAFE_BY_RCU)) s->reserved = sizeof(struct rcu_head); if (!calculate_sizes(s, -1)) @@ -5042,7 +5042,7 @@ SLAB_ATTR_RO(cache_dma); static ssize_t destroy_by_rcu_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_DESTROY_BY_RCU)); + return sprintf(buf, "%d\n", !!(s->flags & SLAB_TYPESAFE_BY_RCU)); } SLAB_ATTR_RO(destroy_by_rcu); @@ -5512,6 +5512,7 @@ static void memcg_propagate_slab_attrs(struct kmem_cache *s) char mbuf[64]; char *buf; struct slab_attribute *attr = to_slab_attr(slab_attrs[i]); + ssize_t len; if (!attr || !attr->store || !attr->show) continue; @@ -5536,8 +5537,9 @@ static void memcg_propagate_slab_attrs(struct kmem_cache *s) buf = buffer; } - attr->show(root_cache, buf); - attr->store(s, buf, strlen(buf)); + len = attr->show(root_cache, buf); + if (len > 0) + attr->store(s, buf, len); } if (buffer) @@ -5623,6 +5625,28 @@ static char *create_unique_id(struct kmem_cache *s) return name; } +static void sysfs_slab_remove_workfn(struct work_struct *work) +{ + struct kmem_cache *s = + container_of(work, struct kmem_cache, kobj_remove_work); + + if (!s->kobj.state_in_sysfs) + /* + * For a memcg cache, this may be called during + * deactivation and again on shutdown. Remove only once. + * A cache is never shut down before deactivation is + * complete, so no need to worry about synchronization. + */ + return; + +#ifdef CONFIG_MEMCG + kset_unregister(s->memcg_kset); +#endif + kobject_uevent(&s->kobj, KOBJ_REMOVE); + kobject_del(&s->kobj); + kobject_put(&s->kobj); +} + static int sysfs_slab_add(struct kmem_cache *s) { int err; @@ -5630,6 +5654,8 @@ static int sysfs_slab_add(struct kmem_cache *s) struct kset *kset = cache_kset(s); int unmergeable = slab_unmergeable(s); + INIT_WORK(&s->kobj_remove_work, sysfs_slab_remove_workfn); + if (!kset) { kobject_init(&s->kobj, &slab_ktype); return 0; @@ -5693,20 +5719,8 @@ static void sysfs_slab_remove(struct kmem_cache *s) */ return; - if (!s->kobj.state_in_sysfs) - /* - * For a memcg cache, this may be called during - * deactivation and again on shutdown. Remove only once. - * A cache is never shut down before deactivation is - * complete, so no need to worry about synchronization. - */ - return; - -#ifdef CONFIG_MEMCG - kset_unregister(s->memcg_kset); -#endif - kobject_uevent(&s->kobj, KOBJ_REMOVE); - kobject_del(&s->kobj); + kobject_get(&s->kobj); + schedule_work(&s->kobj_remove_work); } void sysfs_slab_release(struct kmem_cache *s) |
