osd: carry ondisk_read_lock if prepare_transaction may_read()

diff --git a/src/osd/ReplicatedPG.cc b/src/osd/ReplicatedPG.cc
index 846644ddcdf137e8ca9a603ff72c27e028a489e5..d8ee59c49af0c98faed3a94a89c1c875782e5737 100644 (file)
--- a/src/osd/ReplicatedPG.cc
+++ b/src/osd/ReplicatedPG.cc
@@ -577,7 +577,16 @@ void ReplicatedPG::do_op(MOSDOp *op)
 
   // we are acker.
   if (!noop) {
+
+    if (op->may_read()) {
+      dout(10) << " taking ondisk_read_lock" << dendl;
+      obc->ondisk_read_lock();
+    }
     int result = prepare_transaction(ctx);
+    if (op->may_read()) {
+      dout(10) << " dropping ondisk_read_lock" << dendl;
+      obc->ondisk_read_unlock();
+    }
 
     if (result >= 0)
       log_op_stats(soid, ctx);