Merge PR #26422 into master

* refs/pull/26422/head:
	mds: start to trim cache when mds enters clientreplay state
	mds: avoid evaluating stray dentry multiple times
	mds: simplfy stray manager activation

Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>

diff --cc src/mds/MDCache.cc
Simple merge

diff --cc src/mds/MDCache.h
Simple merge

diff --cc src/mds/MDSRank.cc
Simple merge