btrfs: move leak debug code to functions
Clean up the leak debugging in extent_io.c by moving the debug code into functions. This also removes the list_heads used for debugging from the extent_buffer and extent_state structures when debug is not enabled. Since we need a global debug config to do that last part, implement CONFIG_BTRFS_DEBUG to accommodate. Thanks to Dave Sterba for the Kconfig bit. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Eric Sandeen
Josef Bacik
parent
ace68bac61
commit
6d49ba1b47
|
|
@ -63,3 +63,12 @@ config BTRFS_FS_RUN_SANITY_TESTS
|
|||
|
||||
If unsure, say N.
|
||||
|
||||
config BTRFS_DEBUG
|
||||
bool "Btrfs debugging support"
|
||||
depends on BTRFS_FS
|
||||
help
|
||||
Enable run-time debugging support for the btrfs filesystem. This may
|
||||
enable additional and expensive checks with negative impact on
|
||||
performance, or export extra information via sysfs.
|
||||
|
||||
If unsure, say N.
|
||||
|
|
|
|||
|
|
@ -24,12 +24,62 @@
|
|||
static struct kmem_cache *extent_state_cache;
|
||||
static struct kmem_cache *extent_buffer_cache;
|
||||
|
||||
#ifdef CONFIG_BTRFS_DEBUG
|
||||
static LIST_HEAD(buffers);
|
||||
static LIST_HEAD(states);
|
||||
|
||||
#define LEAK_DEBUG 0
|
||||
#if LEAK_DEBUG
|
||||
static DEFINE_SPINLOCK(leak_lock);
|
||||
|
||||
static inline
|
||||
void btrfs_leak_debug_add(struct list_head *new, struct list_head *head)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&leak_lock, flags);
|
||||
list_add(new, head);
|
||||
spin_unlock_irqrestore(&leak_lock, flags);
|
||||
}
|
||||
|
||||
static inline
|
||||
void btrfs_leak_debug_del(struct list_head *entry)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&leak_lock, flags);
|
||||
list_del(entry);
|
||||
spin_unlock_irqrestore(&leak_lock, flags);
|
||||
}
|
||||
|
||||
static inline
|
||||
void btrfs_leak_debug_check(void)
|
||||
{
|
||||
struct extent_state *state;
|
||||
struct extent_buffer *eb;
|
||||
|
||||
while (!list_empty(&states)) {
|
||||
state = list_entry(states.next, struct extent_state, leak_list);
|
||||
printk(KERN_ERR "btrfs state leak: start %llu end %llu "
|
||||
"state %lu in tree %p refs %d\n",
|
||||
(unsigned long long)state->start,
|
||||
(unsigned long long)state->end,
|
||||
state->state, state->tree, atomic_read(&state->refs));
|
||||
list_del(&state->leak_list);
|
||||
kmem_cache_free(extent_state_cache, state);
|
||||
}
|
||||
|
||||
while (!list_empty(&buffers)) {
|
||||
eb = list_entry(buffers.next, struct extent_buffer, leak_list);
|
||||
printk(KERN_ERR "btrfs buffer leak start %llu len %lu "
|
||||
"refs %d\n", (unsigned long long)eb->start,
|
||||
eb->len, atomic_read(&eb->refs));
|
||||
list_del(&eb->leak_list);
|
||||
kmem_cache_free(extent_buffer_cache, eb);
|
||||
}
|
||||
}
|
||||
#else
|
||||
#define btrfs_leak_debug_add(new, head) do {} while (0)
|
||||
#define btrfs_leak_debug_del(entry) do {} while (0)
|
||||
#define btrfs_leak_debug_check() do {} while (0)
|
||||
#endif
|
||||
|
||||
#define BUFFER_LRU_MAX 64
|
||||
|
|
@ -84,29 +134,7 @@ free_state_cache:
|
|||
|
||||
void extent_io_exit(void)
|
||||
{
|
||||
struct extent_state *state;
|
||||
struct extent_buffer *eb;
|
||||
|
||||
while (!list_empty(&states)) {
|
||||
state = list_entry(states.next, struct extent_state, leak_list);
|
||||
printk(KERN_ERR "btrfs state leak: start %llu end %llu "
|
||||
"state %lu in tree %p refs %d\n",
|
||||
(unsigned long long)state->start,
|
||||
(unsigned long long)state->end,
|
||||
state->state, state->tree, atomic_read(&state->refs));
|
||||
list_del(&state->leak_list);
|
||||
kmem_cache_free(extent_state_cache, state);
|
||||
|
||||
}
|
||||
|
||||
while (!list_empty(&buffers)) {
|
||||
eb = list_entry(buffers.next, struct extent_buffer, leak_list);
|
||||
printk(KERN_ERR "btrfs buffer leak start %llu len %lu "
|
||||
"refs %d\n", (unsigned long long)eb->start,
|
||||
eb->len, atomic_read(&eb->refs));
|
||||
list_del(&eb->leak_list);
|
||||
kmem_cache_free(extent_buffer_cache, eb);
|
||||
}
|
||||
btrfs_leak_debug_check();
|
||||
|
||||
/*
|
||||
* Make sure all delayed rcu free are flushed before we
|
||||
|
|
@ -134,9 +162,6 @@ void extent_io_tree_init(struct extent_io_tree *tree,
|
|||
static struct extent_state *alloc_extent_state(gfp_t mask)
|
||||
{
|
||||
struct extent_state *state;
|
||||
#if LEAK_DEBUG
|
||||
unsigned long flags;
|
||||
#endif
|
||||
|
||||
state = kmem_cache_alloc(extent_state_cache, mask);
|
||||
if (!state)
|
||||
|
|
@ -144,11 +169,7 @@ static struct extent_state *alloc_extent_state(gfp_t mask)
|
|||
state->state = 0;
|
||||
state->private = 0;
|
||||
state->tree = NULL;
|
||||
#if LEAK_DEBUG
|
||||
spin_lock_irqsave(&leak_lock, flags);
|
||||
list_add(&state->leak_list, &states);
|
||||
spin_unlock_irqrestore(&leak_lock, flags);
|
||||
#endif
|
||||
btrfs_leak_debug_add(&state->leak_list, &states);
|
||||
atomic_set(&state->refs, 1);
|
||||
init_waitqueue_head(&state->wq);
|
||||
trace_alloc_extent_state(state, mask, _RET_IP_);
|
||||
|
|
@ -160,15 +181,8 @@ void free_extent_state(struct extent_state *state)
|
|||
if (!state)
|
||||
return;
|
||||
if (atomic_dec_and_test(&state->refs)) {
|
||||
#if LEAK_DEBUG
|
||||
unsigned long flags;
|
||||
#endif
|
||||
WARN_ON(state->tree);
|
||||
#if LEAK_DEBUG
|
||||
spin_lock_irqsave(&leak_lock, flags);
|
||||
list_del(&state->leak_list);
|
||||
spin_unlock_irqrestore(&leak_lock, flags);
|
||||
#endif
|
||||
btrfs_leak_debug_del(&state->leak_list);
|
||||
trace_free_extent_state(state, _RET_IP_);
|
||||
kmem_cache_free(extent_state_cache, state);
|
||||
}
|
||||
|
|
@ -4065,12 +4079,7 @@ out:
|
|||
|
||||
static void __free_extent_buffer(struct extent_buffer *eb)
|
||||
{
|
||||
#if LEAK_DEBUG
|
||||
unsigned long flags;
|
||||
spin_lock_irqsave(&leak_lock, flags);
|
||||
list_del(&eb->leak_list);
|
||||
spin_unlock_irqrestore(&leak_lock, flags);
|
||||
#endif
|
||||
btrfs_leak_debug_del(&eb->leak_list);
|
||||
kmem_cache_free(extent_buffer_cache, eb);
|
||||
}
|
||||
|
||||
|
|
@ -4080,9 +4089,6 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree,
|
|||
gfp_t mask)
|
||||
{
|
||||
struct extent_buffer *eb = NULL;
|
||||
#if LEAK_DEBUG
|
||||
unsigned long flags;
|
||||
#endif
|
||||
|
||||
eb = kmem_cache_zalloc(extent_buffer_cache, mask);
|
||||
if (eb == NULL)
|
||||
|
|
@ -4102,11 +4108,8 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree,
|
|||
init_waitqueue_head(&eb->write_lock_wq);
|
||||
init_waitqueue_head(&eb->read_lock_wq);
|
||||
|
||||
#if LEAK_DEBUG
|
||||
spin_lock_irqsave(&leak_lock, flags);
|
||||
list_add(&eb->leak_list, &buffers);
|
||||
spin_unlock_irqrestore(&leak_lock, flags);
|
||||
#endif
|
||||
btrfs_leak_debug_add(&eb->leak_list, &buffers);
|
||||
|
||||
spin_lock_init(&eb->refs_lock);
|
||||
atomic_set(&eb->refs, 1);
|
||||
atomic_set(&eb->io_pages, 0);
|
||||
|
|
|
|||
|
|
@ -116,7 +116,9 @@ struct extent_state {
|
|||
/* for use by the FS */
|
||||
u64 private;
|
||||
|
||||
#ifdef CONFIG_BTRFS_DEBUG
|
||||
struct list_head leak_list;
|
||||
#endif
|
||||
};
|
||||
|
||||
#define INLINE_EXTENT_BUFFER_PAGES 16
|
||||
|
|
@ -132,7 +134,6 @@ struct extent_buffer {
|
|||
atomic_t refs;
|
||||
atomic_t io_pages;
|
||||
int read_mirror;
|
||||
struct list_head leak_list;
|
||||
struct rcu_head rcu_head;
|
||||
pid_t lock_owner;
|
||||
|
||||
|
|
@ -159,6 +160,9 @@ struct extent_buffer {
|
|||
wait_queue_head_t read_lock_wq;
|
||||
wait_queue_head_t lock_wq;
|
||||
struct page *pages[INLINE_EXTENT_BUFFER_PAGES];
|
||||
#ifdef CONFIG_BTRFS_DEBUG
|
||||
struct list_head leak_list;
|
||||
#endif
|
||||
};
|
||||
|
||||
static inline void extent_set_compress_type(unsigned long *bio_flags,
|
||||
|
|
|
|||
Loading…
Reference in New Issue