Merge PR #21498 into master

* refs/pull/21498/head:
	client: flush the mdlog in _fsync before waiting on unstable reqs

Reviewed-by: dongdong tao <tdd21151186@gmail.com>
Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>
Reviewed-by: Zheng Yan <zyan@redhat.com>
This commit is contained in:
Patrick Donnelly 2018-04-19 11:09:46 -07:00
commit a4778e9d62
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