ceph: avoid iput() while holding spinlock in ceph_dir_fsync
ceph_mdsc_put_request() can call iput(), which can sleep. Don't do that.
Fixes: #1812
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index a421555..974ef1e 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1218,6 +1218,7 @@
do {
ceph_mdsc_get_request(req);
spin_unlock(&ci->i_unsafe_lock);
+
dout("dir_fsync %p wait on tid %llu (until %llu)\n",
inode, req->r_tid, last_tid);
if (req->r_timeout) {
@@ -1230,9 +1231,9 @@
} else {
wait_for_completion(&req->r_safe_completion);
}
- spin_lock(&ci->i_unsafe_lock);
ceph_mdsc_put_request(req);
+ spin_lock(&ci->i_unsafe_lock);
if (ret || list_empty(head))
break;
req = list_entry(head->next,