Bitmap lists serve two purposes: recording the order of loading/saving
on-disk free space caches, and setting up a list of bitmaps to try to
set up a cluster. Complain if a list is unexpectedly busy.
Signed-off-by: Alexandre Oliva <oliva@xxxxxxxxxxxxxxxxx>
---
fs/btrfs/free-space-cache.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index ec23d43..dd7fe43 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -904,6 +904,7 @@ int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
goto out_nospc;
if (e->bitmap) {
+ BUG_ON(!list_empty(&e->list));
list_add_tail(&e->list, &bitmap_list);
bitmaps++;
}
@@ -2380,6 +2381,9 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
while (entry->bitmap) {
if (list_empty(&entry->list))
list_add_tail(&entry->list, bitmaps);
+ else if (entry->bitmap)
+ printk(KERN_ERR "btrfs: not using (busy?!?) bitmap %lli\n",
+ (unsigned long long)entry->offset);
node = rb_next(&entry->offset_index);
if (!node)
return -ENOSPC;
@@ -2402,6 +2406,9 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
if (entry->bitmap) {
if (list_empty(&entry->list))
list_add_tail(&entry->list, bitmaps);
+ else
+ printk(KERN_ERR "btrfs: not using (busy?!?) bitmap %lli\n",
+ (unsigned long long)entry->offset);
continue;
}
--
1.7.4.4
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