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-rw-r--r--fs/ext4/balloc.c2
-rw-r--r--fs/ext4/ext4.h2
-rw-r--r--fs/ext4/mballoc.c9
3 files changed, 5 insertions, 8 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index c48fd36b2d74..c9329ed5c094 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -703,7 +703,7 @@ int ext4_should_retry_alloc(struct super_block *sb, int *retries)
* possible we just missed a transaction commit that did so
*/
smp_mb();
- if (sbi->s_mb_free_pending == 0) {
+ if (atomic_read(&sbi->s_mb_free_pending) == 0) {
if (test_opt(sb, DISCARD)) {
atomic_inc(&sbi->s_retry_alloc_pending);
flush_work(&sbi->s_discard_work);
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index c65aefa19a99..21507f399942 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1602,7 +1602,7 @@ struct ext4_sb_info {
unsigned short *s_mb_offsets;
unsigned int *s_mb_maxs;
unsigned int s_group_info_size;
- unsigned int s_mb_free_pending;
+ atomic_t s_mb_free_pending;
struct list_head s_freed_data_list[2]; /* List of blocks to be freed
after commit completed */
struct list_head s_discard_list;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index b6aa24b48543..ba3cdacbc9f9 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3687,7 +3687,7 @@ int ext4_mb_init(struct super_block *sb)
}
spin_lock_init(&sbi->s_md_lock);
- sbi->s_mb_free_pending = 0;
+ atomic_set(&sbi->s_mb_free_pending, 0);
INIT_LIST_HEAD(&sbi->s_freed_data_list[0]);
INIT_LIST_HEAD(&sbi->s_freed_data_list[1]);
INIT_LIST_HEAD(&sbi->s_discard_list);
@@ -3903,10 +3903,7 @@ static void ext4_free_data_in_buddy(struct super_block *sb,
/* we expect to find existing buddy because it's pinned */
BUG_ON(err != 0);
- spin_lock(&EXT4_SB(sb)->s_md_lock);
- EXT4_SB(sb)->s_mb_free_pending -= entry->efd_count;
- spin_unlock(&EXT4_SB(sb)->s_md_lock);
-
+ atomic_sub(entry->efd_count, &EXT4_SB(sb)->s_mb_free_pending);
db = e4b.bd_info;
/* there are blocks to put in buddy to make them really free */
count += entry->efd_count;
@@ -6401,7 +6398,7 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
spin_lock(&sbi->s_md_lock);
list_add_tail(&new_entry->efd_list, &sbi->s_freed_data_list[new_entry->efd_tid & 1]);
- sbi->s_mb_free_pending += clusters;
+ atomic_add(clusters, &sbi->s_mb_free_pending);
spin_unlock(&sbi->s_md_lock);
}