Merge branch 'for-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...

[mirror_ubuntu-bionic-kernel.git] / fs / btrfs / inode.c

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 2b790bda79988002403f6fe326dcc5535e9f079d..8e3a5a266917c0fac9da9f41ee080262f3394779 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4605,8 +4605,8 @@ delete:
                        BUG_ON(ret);
                        if (btrfs_should_throttle_delayed_refs(trans, root))
                                btrfs_async_run_delayed_refs(root,
-                                                            trans->transid,
-                                       trans->delayed_ref_updates * 2, 0);
+                                       trans->delayed_ref_updates * 2,
+                                       trans->transid, 0);
                        if (be_nice) {
                                if (truncate_space_check(trans, root,
                                                         extent_num_bytes)) {
@@ -8931,9 +8931,14 @@ again:
         *    So even we call qgroup_free_data(), it won't decrease reserved
         *    space.
         * 2) Not written to disk
-        *    This means the reserved space should be freed here.
+        *    This means the reserved space should be freed here. However,
+        *    if a truncate invalidates the page (by clearing PageDirty)
+        *    and the page is accounted for while allocating extent
+        *    in btrfs_check_data_free_space() we let delayed_ref to
+        *    free the entire extent.
         */
-       btrfs_qgroup_free_data(inode, page_start, PAGE_SIZE);
+       if (PageDirty(page))
+               btrfs_qgroup_free_data(inode, page_start, PAGE_SIZE);
        if (!inode_evicting) {
                clear_extent_bit(tree, page_start, page_end,
                                 EXTENT_LOCKED | EXTENT_DIRTY |