ceph: Fix __ceph_do_pending_vmtruncate

we should set i_truncate_pending to 0 after page cache is truncated
to i_truncate_size

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Sage Weil <sage@inktank.com>

1 files changed, 9 insertions, 6 deletions

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 4b5762ef7c2b..81613bced19f 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1466,7 +1466,7 @@ void __ceph_do_pending_vmtruncate(struct inode *inode)
 {
         struct ceph_inode_info *ci = ceph_inode(inode);
         u64 to;
-        int wrbuffer_refs, wake = 0;
+        int wrbuffer_refs, finish = 0;
 
 retry:
         spin_lock(&ci->i_ceph_lock);
@@ -1498,15 +1498,18 @@ retry:
         truncate_inode_pages(inode->i_mapping, to);
 
         spin_lock(&ci->i_ceph_lock);
-        ci->i_truncate_pending--;
-        if (ci->i_truncate_pending == 0)
-                wake = 1;
+        if (to == ci->i_truncate_size) {
+                ci->i_truncate_pending = 0;
+                finish = 1;
+        }
         spin_unlock(&ci->i_ceph_lock);
+        if (!finish)
+                goto retry;
 
         if (wrbuffer_refs == 0)
                 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
-        if (wake)
-                wake_up_all(&ci->i_cap_wq);
+
+        wake_up_all(&ci->i_cap_wq);
 }