ceph/ceph — pull request #3056 by ukernel (2014-12-02 13:51:24+00:00)
Title: client: invalidate kernel dentries one by one

Our trick to trim the whole kernel dentry tree does not work for 3.18+ kernel.
The fix is trim kernel dentries one by one.

Fixes: #9997
Signed-off-by: Yan, Zheng