btrfs: backref: Fix soft lockup in __merge_refs function

[cascardo/linux.git] / fs / btrfs / backref.c

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index d309018..455a6b2 100644 (file)
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -139,7 +139,7 @@ int __init btrfs_prelim_ref_init(void)
        btrfs_prelim_ref_cache = kmem_cache_create("btrfs_prelim_ref",
                                        sizeof(struct __prelim_ref),
                                        0,
-                                       SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
+                                       SLAB_MEM_SPREAD,
                                        NULL);
        if (!btrfs_prelim_ref_cache)
                return -ENOMEM;
@@ -361,7 +361,7 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
                goto out;
        }
 
-       if (btrfs_test_is_dummy_root(root)) {
+       if (btrfs_is_testing(fs_info)) {
                srcu_read_unlock(&fs_info->subvol_srcu, index);
                ret = -ENOENT;
                goto out;
@@ -589,6 +589,7 @@ static void __merge_refs(struct list_head *head, int mode)
 
                        list_del(&ref2->list);
                        kmem_cache_free(btrfs_prelim_ref_cache, ref2);
+                       cond_resched();
                }
 
        }
@@ -1939,7 +1940,7 @@ static int inode_to_path(u64 inum, u32 name_len, unsigned long name_off,
  * from ipath->fspath->val[i].
  * when it returns, there are ipath->fspath->elem_cnt number of paths available
  * in ipath->fspath->val[]. when the allocated space wasn't sufficient, the
- * number of missed paths in recored in ipath->fspath->elem_missed, otherwise,
+ * number of missed paths is recorded in ipath->fspath->elem_missed, otherwise,
  * it's zero. ipath->fspath->bytes_missing holds the number of bytes that would
  * have been needed to return all paths.
  */