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-rw-r--r--mm/slab.c13
-rw-r--r--mm/slab.h9
-rw-r--r--mm/slab_common.c23
-rw-r--r--mm/slob.c13
-rw-r--r--mm/slub.c14
5 files changed, 72 insertions, 0 deletions
diff --git a/mm/slab.c b/mm/slab.c
index bbd0b47dc6a9..60c936938b84 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3416,6 +3416,19 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
}
EXPORT_SYMBOL(kmem_cache_alloc);
+void kmem_cache_free_bulk(struct kmem_cache *s, size_t size, void **p)
+{
+ __kmem_cache_free_bulk(s, size, p);
+}
+EXPORT_SYMBOL(kmem_cache_free_bulk);
+
+bool kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size,
+ void **p)
+{
+ return __kmem_cache_alloc_bulk(s, flags, size, p);
+}
+EXPORT_SYMBOL(kmem_cache_alloc_bulk);
+
#ifdef CONFIG_TRACING
void *
kmem_cache_alloc_trace(struct kmem_cache *cachep, gfp_t flags, size_t size)
diff --git a/mm/slab.h b/mm/slab.h
index 8da63e4e470f..88b55497738c 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -163,6 +163,15 @@ void slabinfo_show_stats(struct seq_file *m, struct kmem_cache *s);
ssize_t slabinfo_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos);
+/*
+ * Generic implementation of bulk operations
+ * These are useful for situations in which the allocator cannot
+ * perform optimizations. In that case segments of the objecct listed
+ * may be allocated or freed using these operations.
+ */
+void __kmem_cache_free_bulk(struct kmem_cache *, size_t, void **);
+bool __kmem_cache_alloc_bulk(struct kmem_cache *, gfp_t, size_t, void **);
+
#ifdef CONFIG_MEMCG_KMEM
/*
* Iterate over all memcg caches of the given root cache. The caller must hold
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 86831105a09f..c26829fe4e37 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -104,6 +104,29 @@ static inline int kmem_cache_sanity_check(const char *name, size_t size)
}
#endif
+void __kmem_cache_free_bulk(struct kmem_cache *s, size_t nr, void **p)
+{
+ size_t i;
+
+ for (i = 0; i < nr; i++)
+ kmem_cache_free(s, p[i]);
+}
+
+bool __kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t nr,
+ void **p)
+{
+ size_t i;
+
+ for (i = 0; i < nr; i++) {
+ void *x = p[i] = kmem_cache_alloc(s, flags);
+ if (!x) {
+ __kmem_cache_free_bulk(s, i, p);
+ return false;
+ }
+ }
+ return true;
+}
+
#ifdef CONFIG_MEMCG_KMEM
void slab_init_memcg_params(struct kmem_cache *s)
{
diff --git a/mm/slob.c b/mm/slob.c
index 4765f65019c7..165bbd3cd606 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -611,6 +611,19 @@ void kmem_cache_free(struct kmem_cache *c, void *b)
}
EXPORT_SYMBOL(kmem_cache_free);
+void kmem_cache_free_bulk(struct kmem_cache *s, size_t size, void **p)
+{
+ __kmem_cache_free_bulk(s, size, p);
+}
+EXPORT_SYMBOL(kmem_cache_free_bulk);
+
+bool kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size,
+ void **p)
+{
+ return __kmem_cache_alloc_bulk(s, flags, size, p);
+}
+EXPORT_SYMBOL(kmem_cache_alloc_bulk);
+
int __kmem_cache_shutdown(struct kmem_cache *c)
{
/* No way to check for remaining objects */
diff --git a/mm/slub.c b/mm/slub.c
index defd76f98648..3ca89ef9b7b0 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2750,6 +2750,20 @@ void kmem_cache_free(struct kmem_cache *s, void *x)
}
EXPORT_SYMBOL(kmem_cache_free);
+void kmem_cache_free_bulk(struct kmem_cache *s, size_t size, void **p)
+{
+ __kmem_cache_free_bulk(s, size, p);
+}
+EXPORT_SYMBOL(kmem_cache_free_bulk);
+
+bool kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size,
+ void **p)
+{
+ return __kmem_cache_alloc_bulk(s, flags, size, p);
+}
+EXPORT_SYMBOL(kmem_cache_alloc_bulk);
+
+
/*
* Object placement in a slab is made very easy because we always start at
* offset 0. If we tune the size of the object to the alignment then we can