+// SPDX-License-Identifier: GPL-2.0
/*
* Slab allocator functions that are independent of the allocator strategy
*
SLAB_FAILSLAB | SLAB_KASAN)
#define SLAB_MERGE_SAME (SLAB_RECLAIM_ACCOUNT | SLAB_CACHE_DMA | \
- SLAB_NOTRACK | SLAB_ACCOUNT)
+ SLAB_ACCOUNT)
/*
* Merge control. If this is set then no merging of slab caches will occur.
}
struct kmem_cache *find_mergeable(size_t size, size_t align,
- unsigned long flags, const char *name, void (*ctor)(void *))
+ slab_flags_t flags, const char *name, void (*ctor)(void *))
{
struct kmem_cache *s;
* Figure out what the alignment of the objects will be given a set of
* flags, a user specified alignment and the size of the objects.
*/
-unsigned long calculate_alignment(unsigned long flags,
+unsigned long calculate_alignment(slab_flags_t flags,
unsigned long align, unsigned long size)
{
/*
static struct kmem_cache *create_cache(const char *name,
size_t object_size, size_t size, size_t align,
- unsigned long flags, void (*ctor)(void *),
+ slab_flags_t flags, void (*ctor)(void *),
struct mem_cgroup *memcg, struct kmem_cache *root_cache)
{
struct kmem_cache *s;
*/
struct kmem_cache *
kmem_cache_create(const char *name, size_t size, size_t align,
- unsigned long flags, void (*ctor)(void *))
+ slab_flags_t flags, void (*ctor)(void *))
{
struct kmem_cache *s = NULL;
const char *cache_name;
#ifndef CONFIG_SLOB
/* Create a cache during boot when no slab services are available yet */
void __init create_boot_cache(struct kmem_cache *s, const char *name, size_t size,
- unsigned long flags)
+ slab_flags_t flags)
{
int err;
}
struct kmem_cache *__init create_kmalloc_cache(const char *name, size_t size,
- unsigned long flags)
+ slab_flags_t flags)
{
struct kmem_cache *s = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);
}
}
-static void __init new_kmalloc_cache(int idx, unsigned long flags)
+static void __init new_kmalloc_cache(int idx, slab_flags_t flags)
{
kmalloc_caches[idx] = create_kmalloc_cache(kmalloc_info[idx].name,
kmalloc_info[idx].size, flags);
* may already have been created because they were needed to
* enable allocations for slab creation.
*/
-void __init create_kmalloc_caches(unsigned long flags)
+void __init create_kmalloc_caches(slab_flags_t flags)
{
int i;
}
#endif /* CONFIG_SLAB_FREELIST_RANDOM */
-#ifdef CONFIG_SLABINFO
-
+#if defined(CONFIG_SLAB) || defined(CONFIG_SLUB_DEBUG)
#ifdef CONFIG_SLAB
#define SLABINFO_RIGHTS (S_IWUSR | S_IRUSR)
#else
return 0;
}
-#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
+void dump_unreclaimable_slab(void)
+{
+ struct kmem_cache *s, *s2;
+ struct slabinfo sinfo;
+
+ /*
+ * Here acquiring slab_mutex is risky since we don't prefer to get
+ * sleep in oom path. But, without mutex hold, it may introduce a
+ * risk of crash.
+ * Use mutex_trylock to protect the list traverse, dump nothing
+ * without acquiring the mutex.
+ */
+ if (!mutex_trylock(&slab_mutex)) {
+ pr_warn("excessive unreclaimable slab but cannot dump stats\n");
+ return;
+ }
+
+ pr_info("Unreclaimable slab info:\n");
+ pr_info("Name Used Total\n");
+
+ list_for_each_entry_safe(s, s2, &slab_caches, list) {
+ if (!is_root_cache(s) || (s->flags & SLAB_RECLAIM_ACCOUNT))
+ continue;
+
+ get_slabinfo(s, &sinfo);
+
+ if (sinfo.num_objs > 0)
+ pr_info("%-17s %10luKB %10luKB\n", cache_name(s),
+ (sinfo.active_objs * s->size) / 1024,
+ (sinfo.num_objs * s->size) / 1024);
+ }
+ mutex_unlock(&slab_mutex);
+}
+
+#if defined(CONFIG_MEMCG)
void *memcg_slab_start(struct seq_file *m, loff_t *pos)
{
struct mem_cgroup *memcg = mem_cgroup_from_css(seq_css(m));
return 0;
}
module_init(slab_proc_init);
-#endif /* CONFIG_SLABINFO */
+#endif /* CONFIG_SLAB || CONFIG_SLUB_DEBUG */
static __always_inline void *__do_krealloc(const void *p, size_t new_size,
gfp_t flags)