Hmm well then we're hitting one of the other corner cases. Can you run with
this debug thread and reboot. Hopefully it will tell me why we're not saving
the free space cache. Thanks,
Josef
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 87aae66..4fd5659 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2794,13 +2794,17 @@ again:
if (i_size_read(inode) > 0) {
ret = btrfs_truncate_free_space_cache(root, trans, path,
inode);
- if (ret)
+ if (ret) {
+ printk(KERN_ERR "truncate free space cache failed for %llu, %d\n",
+ block_group->key.objectid, ret);
goto out_put;
+ }
}
spin_lock(&block_group->lock);
if (block_group->cached != BTRFS_CACHE_FINISHED) {
spin_unlock(&block_group->lock);
+ printk(KERN_ERR "block group %llu not cached\n", block_group->key.objectid);
goto out_put;
}
spin_unlock(&block_group->lock);
@@ -2820,8 +2824,10 @@ again:
num_pages *= PAGE_CACHE_SIZE;
ret = btrfs_check_data_free_space(inode, num_pages);
- if (ret)
+ if (ret) {
+ printk(KERN_ERR "not enough free space for cache %llu\n", block_group->key.objectid);
goto out_put;
+ }
ret = btrfs_prealloc_file_range_trans(inode, trans, 0, 0, num_pages,
num_pages, num_pages,
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 22ee0dc..0078172 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -511,6 +511,8 @@ int btrfs_write_out_cache(struct btrfs_root *root,
spin_lock(&block_group->lock);
if (block_group->disk_cache_state < BTRFS_DC_SETUP) {
spin_unlock(&block_group->lock);
+ printk(KERN_ERR "block group %llu, wrong dcs %d\n", block_group->key.objectid,
+ block_group->disk_cache_state);
return 0;
}
spin_unlock(&block_group->lock);
@@ -520,6 +522,7 @@ int btrfs_write_out_cache(struct btrfs_root *root,
return 0;
if (!i_size_read(inode)) {
+ printk(KERN_ERR "no allocated space for block group ...
