ceph: pre-allocate data structure that tracks caps flushing

Signed-off-by: Yan, Zheng <zyan@redhat.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index e7f13f742357..4415e977d72b 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -309,6 +309,7 @@ struct ceph_inode_info {
         /* we need to track cap writeback on a per-cap-bit basis, to allow
          * overlapping, pipelined cap flushes to the mds.  we can probably
          * reduce the tid to 8 bits if we're concerned about inode size. */
+        struct ceph_cap_flush *i_prealloc_cap_flush;
         struct rb_root i_cap_flush_tree;
         wait_queue_head_t i_cap_wq;      /* threads waiting on a capability */
         unsigned long i_hold_caps_min; /* jiffies */
@@ -578,7 +579,10 @@ static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
 {
         return ci->i_dirty_caps | ci->i_flushing_caps;
 }
-extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask);
+extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
+extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
+extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
+                                  struct ceph_cap_flush **pcf);
 
 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
                                       struct ceph_cap *ocap, int mask);