nfsd4: fix bad seqid on lock request incompatible with open mode

[safe/jmp/linux-2.6] / mm / slub.c

diff --git a/mm/slub.c b/mm/slub.c
index 9acb413..5cc4b7d 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -172,7 +172,7 @@ static inline void ClearSlabDebug(struct page *page)
  * Mininum number of partial slabs. These will be left on the partial
  * lists even if they are empty. kmem_cache_shrink may reclaim them.
  */
-#define MIN_PARTIAL 2
+#define MIN_PARTIAL 5
 
 /*
  * Maximum number of desirable partial slabs.
@@ -1613,7 +1613,7 @@ checks_ok:
         * then add it.
         */
        if (unlikely(!prior))
-               add_partial(get_node(s, page_to_nid(page)), page);
+               add_partial_tail(get_node(s, page_to_nid(page)), page);
 
 out_unlock:
        slab_unlock(page);
@@ -2558,8 +2558,12 @@ size_t ksize(const void *object)
        if (unlikely(object == ZERO_SIZE_PTR))
                return 0;
 
-       page = get_object_page(object);
+       page = virt_to_head_page(object);
        BUG_ON(!page);
+
+       if (unlikely(!PageSlab(page)))
+               return PAGE_SIZE << compound_order(page);
+
        s = page->slab;
        BUG_ON(!s);
 
@@ -3072,6 +3076,19 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
        return slab_alloc(s, gfpflags, node, caller);
 }
 
+static unsigned long count_partial(struct kmem_cache_node *n)
+{
+       unsigned long flags;
+       unsigned long x = 0;
+       struct page *page;
+
+       spin_lock_irqsave(&n->list_lock, flags);
+       list_for_each_entry(page, &n->partial, lru)
+               x += page->inuse;
+       spin_unlock_irqrestore(&n->list_lock, flags);
+       return x;
+}
+
 #if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
 static int validate_slab(struct kmem_cache *s, struct page *page,
                                                unsigned long *map)
@@ -3454,19 +3471,6 @@ static int list_locations(struct kmem_cache *s, char *buf,
        return n;
 }
 
-static unsigned long count_partial(struct kmem_cache_node *n)
-{
-       unsigned long flags;
-       unsigned long x = 0;
-       struct page *page;
-
-       spin_lock_irqsave(&n->list_lock, flags);
-       list_for_each_entry(page, &n->partial, lru)
-               x += page->inuse;
-       spin_unlock_irqrestore(&n->list_lock, flags);
-       return x;
-}
-
 enum slab_stat_type {
        SL_FULL,
        SL_PARTIAL,
@@ -3958,7 +3962,7 @@ static struct kset_uevent_ops slab_uevent_ops = {
        .filter = uevent_filter,
 };
 
-static decl_subsys(slab, &slab_ktype, &slab_uevent_ops);
+static struct kset *slab_kset;
 
 #define ID_STR_LENGTH 64
 
@@ -4011,7 +4015,7 @@ static int sysfs_slab_add(struct kmem_cache *s)
                 * This is typically the case for debug situations. In that
                 * case we can catch duplicate names easily.
                 */
-               sysfs_remove_link(&slab_subsys.kobj, s->name);
+               sysfs_remove_link(&slab_kset->kobj, s->name);
                name = s->name;
        } else {
                /*
@@ -4021,12 +4025,12 @@ static int sysfs_slab_add(struct kmem_cache *s)
                name = create_unique_id(s);
        }
 
-       kobj_set_kset_s(s, slab_subsys);
-       kobject_set_name(&s->kobj, name);
-       kobject_init(&s->kobj);
-       err = kobject_add(&s->kobj);
-       if (err)
+       s->kobj.kset = slab_kset;
+       err = kobject_init_and_add(&s->kobj, &slab_ktype, NULL, name);
+       if (err) {
+               kobject_put(&s->kobj);
                return err;
+       }
 
        err = sysfs_create_group(&s->kobj, &slab_attr_group);
        if (err)
@@ -4066,9 +4070,8 @@ static int sysfs_slab_alias(struct kmem_cache *s, const char *name)
                /*
                 * If we have a leftover link then remove it.
                 */
-               sysfs_remove_link(&slab_subsys.kobj, name);
-               return sysfs_create_link(&slab_subsys.kobj,
-                                               &s->kobj, name);
+               sysfs_remove_link(&slab_kset->kobj, name);
+               return sysfs_create_link(&slab_kset->kobj, &s->kobj, name);
        }
 
        al = kmalloc(sizeof(struct saved_alias), GFP_KERNEL);
@@ -4087,8 +4090,8 @@ static int __init slab_sysfs_init(void)
        struct kmem_cache *s;
        int err;
 
-       err = subsystem_register(&slab_subsys);
-       if (err) {
+       slab_kset = kset_create_and_add("slab", &slab_uevent_ops, kernel_kobj);
+       if (!slab_kset) {
                printk(KERN_ERR "Cannot register slab subsystem.\n");
                return -ENOSYS;
        }
@@ -4119,3 +4122,89 @@ static int __init slab_sysfs_init(void)
 
 __initcall(slab_sysfs_init);
 #endif
+
+/*
+ * The /proc/slabinfo ABI
+ */
+#ifdef CONFIG_SLABINFO
+
+ssize_t slabinfo_write(struct file *file, const char __user * buffer,
+                       size_t count, loff_t *ppos)
+{
+       return -EINVAL;
+}
+
+
+static void print_slabinfo_header(struct seq_file *m)
+{
+       seq_puts(m, "slabinfo - version: 2.1\n");
+       seq_puts(m, "# name            <active_objs> <num_objs> <objsize> "
+                "<objperslab> <pagesperslab>");
+       seq_puts(m, " : tunables <limit> <batchcount> <sharedfactor>");
+       seq_puts(m, " : slabdata <active_slabs> <num_slabs> <sharedavail>");
+       seq_putc(m, '\n');
+}
+
+static void *s_start(struct seq_file *m, loff_t *pos)
+{
+       loff_t n = *pos;
+
+       down_read(&slub_lock);
+       if (!n)
+               print_slabinfo_header(m);
+
+       return seq_list_start(&slab_caches, *pos);
+}
+
+static void *s_next(struct seq_file *m, void *p, loff_t *pos)
+{
+       return seq_list_next(p, &slab_caches, pos);
+}
+
+static void s_stop(struct seq_file *m, void *p)
+{
+       up_read(&slub_lock);
+}
+
+static int s_show(struct seq_file *m, void *p)
+{
+       unsigned long nr_partials = 0;
+       unsigned long nr_slabs = 0;
+       unsigned long nr_inuse = 0;
+       unsigned long nr_objs;
+       struct kmem_cache *s;
+       int node;
+
+       s = list_entry(p, struct kmem_cache, list);
+
+       for_each_online_node(node) {
+               struct kmem_cache_node *n = get_node(s, node);
+
+               if (!n)
+                       continue;
+
+               nr_partials += n->nr_partial;
+               nr_slabs += atomic_long_read(&n->nr_slabs);
+               nr_inuse += count_partial(n);
+       }
+
+       nr_objs = nr_slabs * s->objects;
+       nr_inuse += (nr_slabs - nr_partials) * s->objects;
+
+       seq_printf(m, "%-17s %6lu %6lu %6u %4u %4d", s->name, nr_inuse,
+                  nr_objs, s->size, s->objects, (1 << s->order));
+       seq_printf(m, " : tunables %4u %4u %4u", 0, 0, 0);
+       seq_printf(m, " : slabdata %6lu %6lu %6lu", nr_slabs, nr_slabs,
+                  0UL);
+       seq_putc(m, '\n');
+       return 0;
+}
+
+const struct seq_operations slabinfo_op = {
+       .start = s_start,
+       .next = s_next,
+       .stop = s_stop,
+       .show = s_show,
+};
+
+#endif /* CONFIG_SLABINFO */