#include <linux/cpu.h>
#include <linux/sysctl.h>
#include <linux/module.h>
+#include <trace/kmemtrace.h>
#include <linux/rcupdate.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#endif
+#ifdef CONFIG_KMEMTRACE
+size_t slab_buffer_size(struct kmem_cache *cachep)
+{
+ return cachep->buffer_size;
+}
+EXPORT_SYMBOL(slab_buffer_size);
+#endif
+
/*
* Do not go above this order unless 0 objects fit into the slab.
*/
struct kmem_cache *cachep;
struct kmem_list3 *l3 = NULL;
int node = cpu_to_node(cpu);
- node_to_cpumask_ptr(mask, node);
+ const struct cpumask *mask = cpumask_of_node(node);
list_for_each_entry(cachep, &cache_chain, next) {
struct array_cache *nc;
*
* @name must be valid until the cache is destroyed. This implies that
* the module calling this has to destroy the cache before getting unloaded.
+ * Note that kmem_cache_name() is not guaranteed to return the same pointer,
+ * therefore applications must manage it themselves.
*
* The flags are
*
/*
* We use cache_chain_mutex to ensure a consistent view of
- * cpu_online_map as well. Please see cpuup_callback
+ * cpu_online_mask as well. Please see cpuup_callback
*/
get_online_cpus();
mutex_lock(&cache_chain_mutex);
if (OFF_SLAB(cachep)) {
/* Slab management obj is off-slab. */
slabp = kmem_cache_alloc_node(cachep->slabp_cache,
- local_flags & ~GFP_THISNODE, nodeid);
+ local_flags, nodeid);
if (!slabp)
return NULL;
} else {
* there must be at least one object available for
* allocation.
*/
- BUG_ON(slabp->inuse < 0 || slabp->inuse >= cachep->num);
+ BUG_ON(slabp->inuse >= cachep->num);
while (slabp->inuse < cachep->num && batchcount--) {
STATS_INC_ALLOCED(cachep);
#define cache_alloc_debugcheck_after(a,b,objp,d) (objp)
#endif
-#ifdef CONFIG_FAILSLAB
-
-static struct failslab_attr {
-
- struct fault_attr attr;
-
- u32 ignore_gfp_wait;
-#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
- struct dentry *ignore_gfp_wait_file;
-#endif
-
-} failslab = {
- .attr = FAULT_ATTR_INITIALIZER,
- .ignore_gfp_wait = 1,
-};
-
-static int __init setup_failslab(char *str)
-{
- return setup_fault_attr(&failslab.attr, str);
-}
-__setup("failslab=", setup_failslab);
-
-static int should_failslab(struct kmem_cache *cachep, gfp_t flags)
+static bool slab_should_failslab(struct kmem_cache *cachep, gfp_t flags)
{
if (cachep == &cache_cache)
- return 0;
- if (flags & __GFP_NOFAIL)
- return 0;
- if (failslab.ignore_gfp_wait && (flags & __GFP_WAIT))
- return 0;
-
- return should_fail(&failslab.attr, obj_size(cachep));
-}
+ return false;
-#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-
-static int __init failslab_debugfs(void)
-{
- mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
- struct dentry *dir;
- int err;
-
- err = init_fault_attr_dentries(&failslab.attr, "failslab");
- if (err)
- return err;
- dir = failslab.attr.dentries.dir;
-
- failslab.ignore_gfp_wait_file =
- debugfs_create_bool("ignore-gfp-wait", mode, dir,
- &failslab.ignore_gfp_wait);
-
- if (!failslab.ignore_gfp_wait_file) {
- err = -ENOMEM;
- debugfs_remove(failslab.ignore_gfp_wait_file);
- cleanup_fault_attr_dentries(&failslab.attr);
- }
-
- return err;
+ return should_failslab(obj_size(cachep), flags);
}
-late_initcall(failslab_debugfs);
-
-#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
-
-#else /* CONFIG_FAILSLAB */
-
-static inline int should_failslab(struct kmem_cache *cachep, gfp_t flags)
-{
- return 0;
-}
-
-#endif /* CONFIG_FAILSLAB */
-
static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
{
void *objp;
unsigned long save_flags;
void *ptr;
- if (should_failslab(cachep, flags))
+ lockdep_trace_alloc(flags);
+
+ if (slab_should_failslab(cachep, flags))
return NULL;
cache_alloc_debugcheck_before(cachep, flags);
unsigned long save_flags;
void *objp;
- if (should_failslab(cachep, flags))
+ lockdep_trace_alloc(flags);
+
+ if (slab_should_failslab(cachep, flags))
return NULL;
cache_alloc_debugcheck_before(cachep, flags);
*/
void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
{
- return __cache_alloc(cachep, flags, __builtin_return_address(0));
+ void *ret = __cache_alloc(cachep, flags, __builtin_return_address(0));
+
+ trace_kmem_cache_alloc(_RET_IP_, ret,
+ obj_size(cachep), cachep->buffer_size, flags);
+
+ return ret;
}
EXPORT_SYMBOL(kmem_cache_alloc);
+#ifdef CONFIG_KMEMTRACE
+void *kmem_cache_alloc_notrace(struct kmem_cache *cachep, gfp_t flags)
+{
+ return __cache_alloc(cachep, flags, __builtin_return_address(0));
+}
+EXPORT_SYMBOL(kmem_cache_alloc_notrace);
+#endif
+
/**
* kmem_ptr_validate - check if an untrusted pointer might be a slab entry.
* @cachep: the cache we're checking against
#ifdef CONFIG_NUMA
void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
{
- return __cache_alloc_node(cachep, flags, nodeid,
- __builtin_return_address(0));
+ void *ret = __cache_alloc_node(cachep, flags, nodeid,
+ __builtin_return_address(0));
+
+ trace_kmem_cache_alloc_node(_RET_IP_, ret,
+ obj_size(cachep), cachep->buffer_size,
+ flags, nodeid);
+
+ return ret;
}
EXPORT_SYMBOL(kmem_cache_alloc_node);
+#ifdef CONFIG_KMEMTRACE
+void *kmem_cache_alloc_node_notrace(struct kmem_cache *cachep,
+ gfp_t flags,
+ int nodeid)
+{
+ return __cache_alloc_node(cachep, flags, nodeid,
+ __builtin_return_address(0));
+}
+EXPORT_SYMBOL(kmem_cache_alloc_node_notrace);
+#endif
+
static __always_inline void *
__do_kmalloc_node(size_t size, gfp_t flags, int node, void *caller)
{
struct kmem_cache *cachep;
+ void *ret;
cachep = kmem_find_general_cachep(size, flags);
if (unlikely(ZERO_OR_NULL_PTR(cachep)))
return cachep;
- return kmem_cache_alloc_node(cachep, flags, node);
+ ret = kmem_cache_alloc_node_notrace(cachep, flags, node);
+
+ trace_kmalloc_node((unsigned long) caller, ret,
+ size, cachep->buffer_size, flags, node);
+
+ return ret;
}
-#ifdef CONFIG_DEBUG_SLAB
+#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_KMEMTRACE)
void *__kmalloc_node(size_t size, gfp_t flags, int node)
{
return __do_kmalloc_node(size, flags, node,
EXPORT_SYMBOL(__kmalloc_node);
void *__kmalloc_node_track_caller(size_t size, gfp_t flags,
- int node, void *caller)
+ int node, unsigned long caller)
{
- return __do_kmalloc_node(size, flags, node, caller);
+ return __do_kmalloc_node(size, flags, node, (void *)caller);
}
EXPORT_SYMBOL(__kmalloc_node_track_caller);
#else
void *caller)
{
struct kmem_cache *cachep;
+ void *ret;
/* If you want to save a few bytes .text space: replace
* __ with kmem_.
cachep = __find_general_cachep(size, flags);
if (unlikely(ZERO_OR_NULL_PTR(cachep)))
return cachep;
- return __cache_alloc(cachep, flags, caller);
+ ret = __cache_alloc(cachep, flags, caller);
+
+ trace_kmalloc((unsigned long) caller, ret,
+ size, cachep->buffer_size, flags);
+
+ return ret;
}
-#ifdef CONFIG_DEBUG_SLAB
+#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_KMEMTRACE)
void *__kmalloc(size_t size, gfp_t flags)
{
return __do_kmalloc(size, flags, __builtin_return_address(0));
}
EXPORT_SYMBOL(__kmalloc);
-void *__kmalloc_track_caller(size_t size, gfp_t flags, void *caller)
+void *__kmalloc_track_caller(size_t size, gfp_t flags, unsigned long caller)
{
- return __do_kmalloc(size, flags, caller);
+ return __do_kmalloc(size, flags, (void *)caller);
}
EXPORT_SYMBOL(__kmalloc_track_caller);
debug_check_no_obj_freed(objp, obj_size(cachep));
__cache_free(cachep, objp);
local_irq_restore(flags);
+
+ trace_kmem_cache_free(_RET_IP_, objp);
}
EXPORT_SYMBOL(kmem_cache_free);
struct kmem_cache *c;
unsigned long flags;
+ trace_kfree(_RET_IP_, objp);
+
if (unlikely(ZERO_OR_NULL_PTR(objp)))
return;
local_irq_save(flags);
struct kmem_cache *searchp;
struct kmem_list3 *l3;
int node = numa_node_id();
- struct delayed_work *work =
- container_of(w, struct delayed_work, work);
+ struct delayed_work *work = to_delayed_work(w);
if (!mutex_trylock(&cache_chain_mutex))
/* Give up. Setup the next iteration. */
* + further values on SMP and with statistics enabled
*/
-const struct seq_operations slabinfo_op = {
+static const struct seq_operations slabinfo_op = {
.start = s_start,
.next = s_next,
.stop = s_stop,
return res;
}
+static int slabinfo_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &slabinfo_op);
+}
+
+static const struct file_operations proc_slabinfo_operations = {
+ .open = slabinfo_open,
+ .read = seq_read,
+ .write = slabinfo_write,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
#ifdef CONFIG_DEBUG_SLAB_LEAK
static void *leaks_start(struct seq_file *m, loff_t *pos)
static int __init slab_proc_init(void)
{
+ proc_create("slabinfo",S_IWUSR|S_IRUGO,NULL,&proc_slabinfo_operations);
#ifdef CONFIG_DEBUG_SLAB_LEAK
proc_create("slab_allocators", 0, NULL, &proc_slabstats_operations);
#endif
return obj_size(virt_to_cache(objp));
}
+EXPORT_SYMBOL(ksize);