mds: try fragmenting new fragments during split

In case insertions have occurred during the split that would
immediately take the new fragments over the split threshold.

Signed-off-by: John Spray <john.spray@redhat.com>

diff --git a/src/mds/MDCache.cc b/src/mds/MDCache.cc
index eeb5d3a8534c69ae917e4df257b8b0c764287850..d89480f12de79d15d489547a427019d3f9dfdf8e 100644 (file)
--- a/src/mds/MDCache.cc
+++ b/src/mds/MDCache.cc
@@ -11315,6 +11315,12 @@ void MDCache::_fragment_finish(dirfrag_t basedirfrag, list<CDir*>& resultfrags)
   for (const auto &dir : resultfrags) {
     dir->state_clear(CDir::STATE_FRAGMENTING);
     dir->auth_unpin(this);
+
+    // In case the resulting fragments are beyond the split size,
+    // we might need to split them again right away (they could
+    // have been taking inserts between unfreezing and getting
+    // here)
+    mds->balancer->maybe_fragment(dir, false);
   }
 
   if (mds->logger) {