* Set of flags that will prevent slab merging
*/
#define SLUB_NEVER_MERGE (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER | \
- SLAB_TRACE | SLAB_DESTROY_BY_RCU | SLAB_NOLEAKTRACE)
+ SLAB_TRACE | SLAB_DESTROY_BY_RCU | SLAB_NOLEAKTRACE | \
+ SLAB_FAILSLAB)
#define SLUB_MERGE_SAME (SLAB_DEBUG_FREE | SLAB_RECLAIM_ACCOUNT | \
SLAB_CACHE_DMA | SLAB_NOTRACK)
#endif
-static inline void stat(struct kmem_cache_cpu *c, enum stat_item si)
+static inline void stat(struct kmem_cache *s, enum stat_item si)
{
#ifdef CONFIG_SLUB_STATS
- c->stat[si]++;
+ __this_cpu_inc(s->cpu_slab->stat[si]);
#endif
}
case 't':
slub_debug |= SLAB_TRACE;
break;
+ case 'a':
+ slub_debug |= SLAB_FAILSLAB;
+ break;
default:
printk(KERN_ERR "slub_debug option '%c' "
"unknown. skipped\n", *str);
if (!page)
return NULL;
- stat(this_cpu_ptr(s->cpu_slab), ORDER_FALLBACK);
+ stat(s, ORDER_FALLBACK);
}
if (kmemcheck_enabled
static void unfreeze_slab(struct kmem_cache *s, struct page *page, int tail)
{
struct kmem_cache_node *n = get_node(s, page_to_nid(page));
- struct kmem_cache_cpu *c = this_cpu_ptr(s->cpu_slab);
__ClearPageSlubFrozen(page);
if (page->inuse) {
if (page->freelist) {
add_partial(n, page, tail);
- stat(c, tail ? DEACTIVATE_TO_TAIL : DEACTIVATE_TO_HEAD);
+ stat(s, tail ? DEACTIVATE_TO_TAIL : DEACTIVATE_TO_HEAD);
} else {
- stat(c, DEACTIVATE_FULL);
+ stat(s, DEACTIVATE_FULL);
if (SLABDEBUG && PageSlubDebug(page) &&
(s->flags & SLAB_STORE_USER))
add_full(n, page);
}
slab_unlock(page);
} else {
- stat(c, DEACTIVATE_EMPTY);
+ stat(s, DEACTIVATE_EMPTY);
if (n->nr_partial < s->min_partial) {
/*
* Adding an empty slab to the partial slabs in order
slab_unlock(page);
} else {
slab_unlock(page);
- stat(__this_cpu_ptr(s->cpu_slab), FREE_SLAB);
+ stat(s, FREE_SLAB);
discard_slab(s, page);
}
}
int tail = 1;
if (page->freelist)
- stat(c, DEACTIVATE_REMOTE_FREES);
+ stat(s, DEACTIVATE_REMOTE_FREES);
/*
* Merge cpu freelist into slab freelist. Typically we get here
* because both freelists are empty. So this is unlikely
static inline void flush_slab(struct kmem_cache *s, struct kmem_cache_cpu *c)
{
- stat(c, CPUSLAB_FLUSH);
+ stat(s, CPUSLAB_FLUSH);
slab_lock(c->page);
deactivate_slab(s, c);
}
if (unlikely(!node_match(c, node)))
goto another_slab;
- stat(c, ALLOC_REFILL);
+ stat(s, ALLOC_REFILL);
load_freelist:
object = c->page->freelist;
c->node = page_to_nid(c->page);
unlock_out:
slab_unlock(c->page);
- stat(c, ALLOC_SLOWPATH);
+ stat(s, ALLOC_SLOWPATH);
return object;
another_slab:
new = get_partial(s, gfpflags, node);
if (new) {
c->page = new;
- stat(c, ALLOC_FROM_PARTIAL);
+ stat(s, ALLOC_FROM_PARTIAL);
goto load_freelist;
}
if (new) {
c = __this_cpu_ptr(s->cpu_slab);
- stat(c, ALLOC_SLAB);
+ stat(s, ALLOC_SLAB);
if (c->page)
flush_slab(s, c);
slab_lock(new);
lockdep_trace_alloc(gfpflags);
might_sleep_if(gfpflags & __GFP_WAIT);
- if (should_failslab(s->objsize, gfpflags))
+ if (should_failslab(s->objsize, gfpflags, s->flags))
return NULL;
local_irq_save(flags);
else {
c->freelist = get_freepointer(s, object);
- stat(c, ALLOC_FASTPATH);
+ stat(s, ALLOC_FASTPATH);
}
local_irq_restore(flags);
{
void *prior;
void **object = (void *)x;
- struct kmem_cache_cpu *c;
- c = __this_cpu_ptr(s->cpu_slab);
- stat(c, FREE_SLOWPATH);
+ stat(s, FREE_SLOWPATH);
slab_lock(page);
if (unlikely(SLABDEBUG && PageSlubDebug(page)))
page->inuse--;
if (unlikely(PageSlubFrozen(page))) {
- stat(c, FREE_FROZEN);
+ stat(s, FREE_FROZEN);
goto out_unlock;
}
*/
if (unlikely(!prior)) {
add_partial(get_node(s, page_to_nid(page)), page, 1);
- stat(c, FREE_ADD_PARTIAL);
+ stat(s, FREE_ADD_PARTIAL);
}
out_unlock:
* Slab still on the partial list.
*/
remove_partial(s, page);
- stat(c, FREE_REMOVE_PARTIAL);
+ stat(s, FREE_REMOVE_PARTIAL);
}
slab_unlock(page);
- stat(c, FREE_SLAB);
+ stat(s, FREE_SLAB);
discard_slab(s, page);
return;
if (likely(page == c->page && c->node >= 0)) {
set_freepointer(s, object, c->freelist);
c->freelist = object;
- stat(c, FREE_FASTPATH);
+ stat(s, FREE_FASTPATH);
} else
__slab_free(s, page, x, addr);
#endif
}
-static DEFINE_PER_CPU(struct kmem_cache_cpu, kmalloc_percpu[SLUB_PAGE_SHIFT]);
+static DEFINE_PER_CPU(struct kmem_cache_cpu, kmalloc_percpu[KMALLOC_CACHES]);
static inline int alloc_kmem_cache_cpus(struct kmem_cache *s, gfp_t flags)
{
* Boot time creation of the kmalloc array. Use static per cpu data
* since the per cpu allocator is not available yet.
*/
- s->cpu_slab = per_cpu_var(kmalloc_percpu) + (s - kmalloc_caches);
+ s->cpu_slab = kmalloc_percpu + (s - kmalloc_caches);
else
s->cpu_slab = alloc_percpu(struct kmem_cache_cpu);
int node;
int local_node;
- if (slab_state >= UP)
+ if (slab_state >= UP && (s < kmalloc_caches ||
+ s > kmalloc_caches + KMALLOC_CACHES))
local_node = page_to_nid(virt_to_page(s));
else
local_node = 0;
{
struct page *page;
+ if (!kern_ptr_validate(object, s->size))
+ return 0;
+
page = get_object_page(object);
if (!page || s != page->slab)
if (slab_state >= SYSFS)
slabflags |= __SYSFS_ADD_DEFERRED;
- if (!s || !text || !kmem_cache_open(s, flags, text,
+ if (!text || !kmem_cache_open(s, flags, text,
realsize, ARCH_KMALLOC_MINALIGN, slabflags, NULL)) {
s->size = 0;
kfree(text);
/*
* 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
+ * and offline_pages() function shouldn't call this
* callback. So, we must fail.
*/
BUG_ON(slabs_node(s, offline_node));
}
SLAB_ATTR(trace);
+#ifdef CONFIG_FAILSLAB
+static ssize_t failslab_show(struct kmem_cache *s, char *buf)
+{
+ return sprintf(buf, "%d\n", !!(s->flags & SLAB_FAILSLAB));
+}
+
+static ssize_t failslab_store(struct kmem_cache *s, const char *buf,
+ size_t length)
+{
+ s->flags &= ~SLAB_FAILSLAB;
+ if (buf[0] == '1')
+ s->flags |= SLAB_FAILSLAB;
+ return length;
+}
+SLAB_ATTR(failslab);
+#endif
+
static ssize_t reclaim_account_show(struct kmem_cache *s, char *buf)
{
return sprintf(buf, "%d\n", !!(s->flags & SLAB_RECLAIM_ACCOUNT));
&deactivate_remote_frees_attr.attr,
&order_fallback_attr.attr,
#endif
+#ifdef CONFIG_FAILSLAB
+ &failslab_attr.attr,
+#endif
+
NULL
};
kfree(s);
}
-static struct sysfs_ops slab_sysfs_ops = {
+static const struct sysfs_ops slab_sysfs_ops = {
.show = slab_attr_show,
.store = slab_attr_store,
};
return 0;
}
-static struct kset_uevent_ops slab_uevent_ops = {
+static const struct kset_uevent_ops slab_uevent_ops = {
.filter = uevent_filter,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff