#include <linux/mempolicy.h>
#include <linux/ctype.h>
#include <linux/kallsyms.h>
+#include <linux/memory.h>
/*
* Lock order:
static unsigned long kmem_cache_flags(unsigned long objsize,
unsigned long flags, const char *name,
- void (*ctor)(void *, struct kmem_cache *, unsigned long))
+ void (*ctor)(struct kmem_cache *, void *))
{
/*
* The page->offset field is only 16 bit wide. This is an offset
static inline void add_full(struct kmem_cache_node *n, struct page *page) {}
static inline unsigned long kmem_cache_flags(unsigned long objsize,
unsigned long flags, const char *name,
- void (*ctor)(void *, struct kmem_cache *, unsigned long))
+ void (*ctor)(struct kmem_cache *, void *))
{
return flags;
}
{
setup_object_debug(s, page, object);
if (unlikely(s->ctor))
- s->ctor(object, s, 0);
+ s->ctor(s, object);
}
static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node)
BUG_ON(flags & GFP_SLAB_BUG_MASK);
- if (flags & __GFP_WAIT)
- local_irq_enable();
-
page = allocate_slab(s,
flags & (GFP_RECLAIM_MASK | GFP_CONSTRAINT_MASK), node);
if (!page)
page->freelist = start;
page->inuse = 0;
out:
- if (flags & __GFP_WAIT)
- local_irq_disable();
return page;
}
goto load_freelist;
}
+ if (gfpflags & __GFP_WAIT)
+ local_irq_enable();
+
new = new_slab(s, gfpflags, node);
+
+ if (gfpflags & __GFP_WAIT)
+ local_irq_disable();
+
if (new) {
c = get_cpu_slab(s, smp_processor_id());
if (c->page) {
init_kmem_cache_node(n);
atomic_long_inc(&n->nr_slabs);
add_partial(n, page);
-
- /*
- * new_slab() disables interupts. If we do not reenable interrupts here
- * then bootup would continue with interrupts disabled.
- */
- local_irq_enable();
return n;
}
static int kmem_cache_open(struct kmem_cache *s, gfp_t gfpflags,
const char *name, size_t size,
size_t align, unsigned long flags,
- void (*ctor)(void *, struct kmem_cache *, unsigned long))
+ void (*ctor)(struct kmem_cache *, void *))
{
memset(s, 0, kmem_size);
s->name = name;
}
EXPORT_SYMBOL(kmem_cache_shrink);
+#if defined(CONFIG_NUMA) && defined(CONFIG_MEMORY_HOTPLUG)
+static int slab_mem_going_offline_callback(void *arg)
+{
+ struct kmem_cache *s;
+
+ down_read(&slub_lock);
+ list_for_each_entry(s, &slab_caches, list)
+ kmem_cache_shrink(s);
+ up_read(&slub_lock);
+
+ return 0;
+}
+
+static void slab_mem_offline_callback(void *arg)
+{
+ struct kmem_cache_node *n;
+ struct kmem_cache *s;
+ struct memory_notify *marg = arg;
+ int offline_node;
+
+ offline_node = marg->status_change_nid;
+
+ /*
+ * If the node still has available memory. we need kmem_cache_node
+ * for it yet.
+ */
+ if (offline_node < 0)
+ return;
+
+ down_read(&slub_lock);
+ list_for_each_entry(s, &slab_caches, list) {
+ n = get_node(s, offline_node);
+ if (n) {
+ /*
+ * if n->nr_slabs > 0, slabs still exist on the node
+ * that is going down. We were unable to free them,
+ * and offline_pages() function shoudn't call this
+ * callback. So, we must fail.
+ */
+ BUG_ON(atomic_read(&n->nr_slabs));
+
+ s->node[offline_node] = NULL;
+ kmem_cache_free(kmalloc_caches, n);
+ }
+ }
+ up_read(&slub_lock);
+}
+
+static int slab_mem_going_online_callback(void *arg)
+{
+ struct kmem_cache_node *n;
+ struct kmem_cache *s;
+ struct memory_notify *marg = arg;
+ int nid = marg->status_change_nid;
+ int ret = 0;
+
+ /*
+ * If the node's memory is already available, then kmem_cache_node is
+ * already created. Nothing to do.
+ */
+ if (nid < 0)
+ return 0;
+
+ /*
+ * We are bringing a node online. No memory is availabe yet. We must
+ * allocate a kmem_cache_node structure in order to bring the node
+ * online.
+ */
+ down_read(&slub_lock);
+ list_for_each_entry(s, &slab_caches, list) {
+ /*
+ * XXX: kmem_cache_alloc_node will fallback to other nodes
+ * since memory is not yet available from the node that
+ * is brought up.
+ */
+ n = kmem_cache_alloc(kmalloc_caches, GFP_KERNEL);
+ if (!n) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ init_kmem_cache_node(n);
+ s->node[nid] = n;
+ }
+out:
+ up_read(&slub_lock);
+ return ret;
+}
+
+static int slab_memory_callback(struct notifier_block *self,
+ unsigned long action, void *arg)
+{
+ int ret = 0;
+
+ switch (action) {
+ case MEM_GOING_ONLINE:
+ ret = slab_mem_going_online_callback(arg);
+ break;
+ case MEM_GOING_OFFLINE:
+ ret = slab_mem_going_offline_callback(arg);
+ break;
+ case MEM_OFFLINE:
+ case MEM_CANCEL_ONLINE:
+ slab_mem_offline_callback(arg);
+ break;
+ case MEM_ONLINE:
+ case MEM_CANCEL_OFFLINE:
+ break;
+ }
+
+ ret = notifier_from_errno(ret);
+ return ret;
+}
+
+#endif /* CONFIG_MEMORY_HOTPLUG */
+
/********************************************************************
* Basic setup of slabs
*******************************************************************/
sizeof(struct kmem_cache_node), GFP_KERNEL);
kmalloc_caches[0].refcount = -1;
caches++;
+
+ hotplug_memory_notifier(slab_memory_callback, 1);
#endif
/* Able to allocate the per node structures */
static struct kmem_cache *find_mergeable(size_t size,
size_t align, unsigned long flags, const char *name,
- void (*ctor)(void *, struct kmem_cache *, unsigned long))
+ void (*ctor)(struct kmem_cache *, void *))
{
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 *, struct kmem_cache *, unsigned long))
+ void (*ctor)(struct kmem_cache *, void *))
{
struct kmem_cache *s;
projects / linux-2.6-omap-h63xx.git / blobdiff