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Commit 3935127c authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: disable leak debugging checks in extent_io.c 



extent_io.c has debugging code to report and free leaked extent_state
and extent_buffer objects at rmmod time.  This helps track down
leaks and it saves you from rebooting just to properly remove the
kmem_cache object.

But, the code runs under a fairly expensive spinlock and the checks to
see if it is currently enabled are not entirely consistent.  Some use
#ifdef and some #if.

This changes everything to #if and disables the leak checking.

Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent b7a9f29f

fs/btrfs/extent_io.c

+8 −8
Original line number Diff line number Diff line
@@ -30,7 +30,7 @@ static LIST_HEAD(buffers); 
static LIST_HEAD(states);



#define LEAK_DEBUG 0

#ifdef LEAK_DEBUG

#if LEAK_DEBUG

static DEFINE_SPINLOCK(leak_lock);

#endif
@@ -119,7 +119,7 @@ void extent_io_tree_init(struct extent_io_tree *tree, 
static struct extent_state *alloc_extent_state(gfp_t mask)

{

	struct extent_state *state;

#ifdef LEAK_DEBUG

#if LEAK_DEBUG

	unsigned long flags;

#endif
@@ -129,7 +129,7 @@ static struct extent_state *alloc_extent_state(gfp_t mask) 
	state->state = 0;

	state->private = 0;

	state->tree = NULL;

#ifdef LEAK_DEBUG

#if LEAK_DEBUG

	spin_lock_irqsave(&leak_lock, flags);

	list_add(&state->leak_list, &states);

	spin_unlock_irqrestore(&leak_lock, flags);
@@ -144,11 +144,11 @@ static void free_extent_state(struct extent_state *state) 
	if (!state)

		return;

	if (atomic_dec_and_test(&state->refs)) {

#ifdef LEAK_DEBUG

#if LEAK_DEBUG

		unsigned long flags;

#endif

		WARN_ON(state->tree);

#ifdef LEAK_DEBUG

#if LEAK_DEBUG

		spin_lock_irqsave(&leak_lock, flags);

		list_del(&state->leak_list);

		spin_unlock_irqrestore(&leak_lock, flags);
@@ -2983,7 +2983,7 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree, 
						   gfp_t mask)

{

	struct extent_buffer *eb = NULL;

#ifdef LEAK_DEBUG

#if LEAK_DEBUG

	unsigned long flags;

#endif
@@ -2991,7 +2991,7 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree, 
	eb->start = start;

	eb->len = len;

	mutex_init(&eb->mutex);

#ifdef LEAK_DEBUG

#if LEAK_DEBUG

	spin_lock_irqsave(&leak_lock, flags);

	list_add(&eb->leak_list, &buffers);

	spin_unlock_irqrestore(&leak_lock, flags);
@@ -3003,7 +3003,7 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree, 


static void __free_extent_buffer(struct extent_buffer *eb)

{

#ifdef LEAK_DEBUG

#if LEAK_DEBUG

	unsigned long flags;

	spin_lock_irqsave(&leak_lock, flags);

	list_del(&eb->leak_list);