ldiskfs/kernel_patches/patches/rhel6.3/ext4-fix-ext4_mb_add_n_trim.patch

   1 Index: linux-stage/fs/ext4/mballoc.c
   2 ===================================================================
   3 --- linux-stage.orig/fs/ext4/mballoc.c
   4 +++ linux-stage/fs/ext4/mballoc.c
   5 @@ -4352,7 +4352,7 @@ static void ext4_mb_add_n_trim(struct ex
   6                 /* The max size of hash table is PREALLOC_TB_SIZE */
   7                 order = PREALLOC_TB_SIZE - 1;
   8         /* Add the prealloc space to lg */
   9 -       rcu_read_lock();
  10 +       spin_lock(&lg->lg_prealloc_lock);
  11         list_for_each_entry_rcu(tmp_pa, &lg->lg_prealloc_list[order],
  12                                                 pa_inode_list) {
  13                 spin_lock(&tmp_pa->pa_lock);
  14 @@ -4376,7 +4376,7 @@ static void ext4_mb_add_n_trim(struct ex
  15         if (!added)
  16                 list_add_tail_rcu(&pa->pa_inode_list,
  17                                         &lg->lg_prealloc_list[order]);
  18 -       rcu_read_unlock();
  19 +       spin_unlock(&lg->lg_prealloc_lock);
  20
  21         /* Now trim the list to be not more than 8 elements */
  22         if (lg_prealloc_count > 8) {