NDB wl-1533 tux optim: after wl-1942 can remove signal from many methods

ndb/src/kernel/blocks/dbtux/Dbtux.hpp:
  wl-1533 tux optim: after wl-1942 can remove signal from many methods
ndb/src/kernel/blocks/dbtux/DbtuxDebug.cpp:
  wl-1533 tux optim: after wl-1942 can remove signal from many methods
ndb/src/kernel/blocks/dbtux/DbtuxMaint.cpp:
  wl-1533 tux optim: after wl-1942 can remove signal from many methods
ndb/src/kernel/blocks/dbtux/DbtuxNode.cpp:
  wl-1533 tux optim: after wl-1942 can remove signal from many methods
ndb/src/kernel/blocks/dbtux/DbtuxScan.cpp:
  wl-1533 tux optim: after wl-1942 can remove signal from many methods
ndb/src/kernel/blocks/dbtux/DbtuxSearch.cpp:
  wl-1533 tux optim: after wl-1942 can remove signal from many methods
ndb/src/kernel/blocks/dbtux/DbtuxTree.cpp:
  wl-1533 tux optim: after wl-1942 can remove signal from many methods
ndb/test/ndbapi/testOIBasic.cpp:
  wl-1533 tux optim: after wl-1942 can remove signal from many methods

7 files changed, 166 insertions, 183 deletions

diff --git a/ndb/src/kernel/blocks/dbtux/Dbtux.hpp b/ndb/src/kernel/blocks/dbtux/Dbtux.hpp
index 144fc3320b8..dc95bf8e8ea 100644
--- a/ndb/src/kernel/blocks/dbtux/Dbtux.hpp
+++ b/ndb/src/kernel/blocks/dbtux/Dbtux.hpp
@@ -32,7 +32,6 @@
 // signal classes
 #include <signaldata/DictTabInfo.hpp>
 #include <signaldata/TuxContinueB.hpp>
-#include <signaldata/BuildIndx.hpp>
 #include <signaldata/TupFrag.hpp>
 #include <signaldata/AlterIndx.hpp>
 #include <signaldata/DropTab.hpp>
@@ -478,7 +477,7 @@ private:
     Uint16 m_numAttrs;
     bool m_storeNullKey;
     TreeHead m_tree;
-    TupLoc m_freeLoc;           // one node pre-allocated for insert
+    TupLoc m_freeLoc;           // list of free index nodes
     DLList<ScanOp> m_scanList;  // current scans on this fragment
     Uint32 m_tupIndexFragPtrI;
     Uint32 m_tupTableFragPtrI[2];
@@ -582,24 +581,24 @@ private:
    * DbtuxNode.cpp
    */
   int allocNode(Signal* signal, NodeHandle& node);
-  void selectNode(Signal* signal, NodeHandle& node, TupLoc loc);
-  void insertNode(Signal* signal, NodeHandle& node);
-  void deleteNode(Signal* signal, NodeHandle& node);
-  void setNodePref(Signal* signal, NodeHandle& node);
+  void selectNode(NodeHandle& node, TupLoc loc);
+  void insertNode(NodeHandle& node);
+  void deleteNode(NodeHandle& node);
+  void setNodePref(NodeHandle& node);
   // node operations
-  void nodePushUp(Signal* signal, NodeHandle& node, unsigned pos, const TreeEnt& ent, Uint32 scanList);
-  void nodePushUpScans(Signal* signal, NodeHandle& node, unsigned pos);
-  void nodePopDown(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& en, Uint32* scanList);
-  void nodePopDownScans(Signal* signal, NodeHandle& node, unsigned pos);
-  void nodePushDown(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent, Uint32& scanList);
-  void nodePushDownScans(Signal* signal, NodeHandle& node, unsigned pos);
-  void nodePopUp(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent, Uint32 scanList);
-  void nodePopUpScans(Signal* signal, NodeHandle& node, unsigned pos);
-  void nodeSlide(Signal* signal, NodeHandle& dstNode, NodeHandle& srcNode, unsigned cnt, unsigned i);
+  void nodePushUp(NodeHandle& node, unsigned pos, const TreeEnt& ent, Uint32 scanList);
+  void nodePushUpScans(NodeHandle& node, unsigned pos);
+  void nodePopDown(NodeHandle& node, unsigned pos, TreeEnt& en, Uint32* scanList);
+  void nodePopDownScans(NodeHandle& node, unsigned pos);
+  void nodePushDown(NodeHandle& node, unsigned pos, TreeEnt& ent, Uint32& scanList);
+  void nodePushDownScans(NodeHandle& node, unsigned pos);
+  void nodePopUp(NodeHandle& node, unsigned pos, TreeEnt& ent, Uint32 scanList);
+  void nodePopUpScans(NodeHandle& node, unsigned pos);
+  void nodeSlide(NodeHandle& dstNode, NodeHandle& srcNode, unsigned cnt, unsigned i);
   // scans linked to node
   void addScanList(NodeHandle& node, unsigned pos, Uint32 scanList);
   void removeScanList(NodeHandle& node, unsigned pos, Uint32& scanList);
-  void moveScanList(Signal* signal, NodeHandle& node, unsigned pos);
+  void moveScanList(NodeHandle& node, unsigned pos);
   void linkScan(NodeHandle& node, ScanOpPtr scanPtr);
   void unlinkScan(NodeHandle& node, ScanOpPtr scanPtr);
   bool islinkScan(NodeHandle& node, ScanOpPtr scanPtr);
@@ -608,20 +607,20 @@ private:
    * DbtuxTree.cpp
    */
   // add entry
-  void treeAdd(Signal* signal, Frag& frag, TreePos treePos, TreeEnt ent);
-  void treeAddFull(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos, TreeEnt ent);
-  void treeAddNode(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos, TreeEnt ent, NodeHandle parentNode, unsigned i);
-  void treeAddRebalance(Signal* signal, Frag& frag, NodeHandle node, unsigned i);
+  void treeAdd(Frag& frag, TreePos treePos, TreeEnt ent);
+  void treeAddFull(Frag& frag, NodeHandle lubNode, unsigned pos, TreeEnt ent);
+  void treeAddNode(Frag& frag, NodeHandle lubNode, unsigned pos, TreeEnt ent, NodeHandle parentNode, unsigned i);
+  void treeAddRebalance(Frag& frag, NodeHandle node, unsigned i);
   // remove entry
-  void treeRemove(Signal* signal, Frag& frag, TreePos treePos);
-  void treeRemoveInner(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos);
-  void treeRemoveSemi(Signal* signal, Frag& frag, NodeHandle node, unsigned i);
-  void treeRemoveLeaf(Signal* signal, Frag& frag, NodeHandle node);
-  void treeRemoveNode(Signal* signal, Frag& frag, NodeHandle node);
-  void treeRemoveRebalance(Signal* signal, Frag& frag, NodeHandle node, unsigned i);
+  void treeRemove(Frag& frag, TreePos treePos);
+  void treeRemoveInner(Frag& frag, NodeHandle lubNode, unsigned pos);
+  void treeRemoveSemi(Frag& frag, NodeHandle node, unsigned i);
+  void treeRemoveLeaf(Frag& frag, NodeHandle node);
+  void treeRemoveNode(Frag& frag, NodeHandle node);
+  void treeRemoveRebalance(Frag& frag, NodeHandle node, unsigned i);
   // rotate
-  void treeRotateSingle(Signal* signal, Frag& frag, NodeHandle& node, unsigned i);
-  void treeRotateDouble(Signal* signal, Frag& frag, NodeHandle& node, unsigned i);
+  void treeRotateSingle(Frag& frag, NodeHandle& node, unsigned i);
+  void treeRotateDouble(Frag& frag, NodeHandle& node, unsigned i);
 
   /*
    * DbtuxScan.cpp
@@ -633,9 +632,9 @@ private:
   void execACCKEYCONF(Signal* signal);
   void execACCKEYREF(Signal* signal);
   void execACC_ABORTCONF(Signal* signal);
-  void scanFirst(Signal* signal, ScanOpPtr scanPtr);
-  void scanNext(Signal* signal, ScanOpPtr scanPtr);
-  bool scanVisible(Signal* signal, ScanOpPtr scanPtr, TreeEnt ent);
+  void scanFirst(ScanOpPtr scanPtr);
+  void scanNext(ScanOpPtr scanPtr);
+  bool scanVisible(ScanOpPtr scanPtr, TreeEnt ent);
   void scanClose(Signal* signal, ScanOpPtr scanPtr);
   void addAccLockOp(ScanOp& scan, Uint32 accLockOp);
   void removeAccLockOp(ScanOp& scan, Uint32 accLockOp);
@@ -644,9 +643,9 @@ private:
   /*
    * DbtuxSearch.cpp
    */
-  void searchToAdd(Signal* signal, Frag& frag, ConstData searchKey, TreeEnt searchEnt, TreePos& treePos);
-  void searchToRemove(Signal* signal, Frag& frag, ConstData searchKey, TreeEnt searchEnt, TreePos& treePos);
-  void searchToScan(Signal* signal, Frag& frag, ConstData boundInfo, unsigned boundCount, TreePos& treePos);
+  void searchToAdd(Frag& frag, ConstData searchKey, TreeEnt searchEnt, TreePos& treePos);
+  void searchToRemove(Frag& frag, ConstData searchKey, TreeEnt searchEnt, TreePos& treePos);
+  void searchToScan(Frag& frag, ConstData boundInfo, unsigned boundCount, TreePos& treePos);
 
   /*
    * DbtuxCmp.cpp
@@ -670,7 +669,7 @@ private:
     PrintPar();
   };
   void printTree(Signal* signal, Frag& frag, NdbOut& out);
-  void printNode(Signal* signal, Frag& frag, NdbOut& out, TupLoc loc, PrintPar& par);
+  void printNode(Frag& frag, NdbOut& out, TupLoc loc, PrintPar& par);
   friend class NdbOut& operator<<(NdbOut&, const TupLoc&);
   friend class NdbOut& operator<<(NdbOut&, const TreeEnt&);
   friend class NdbOut& operator<<(NdbOut&, const TreeNode&);
diff --git a/ndb/src/kernel/blocks/dbtux/DbtuxDebug.cpp b/ndb/src/kernel/blocks/dbtux/DbtuxDebug.cpp
index 9a6f35e76b7..6c2a29f54cc 100644
--- a/ndb/src/kernel/blocks/dbtux/DbtuxDebug.cpp
+++ b/ndb/src/kernel/blocks/dbtux/DbtuxDebug.cpp
@@ -98,7 +98,7 @@ Dbtux::printTree(Signal* signal, Frag& frag, NdbOut& out)
   strcpy(par.m_path, ".");
   par.m_side = 2;
   par.m_parent = NullTupLoc;
-  printNode(signal, frag, out, tree.m_root, par);
+  printNode(frag, out, tree.m_root, par);
   out.m_out->flush();
   if (! par.m_ok) {
     if (debugFile == 0) {
@@ -114,7 +114,7 @@ Dbtux::printTree(Signal* signal, Frag& frag, NdbOut& out)
 }
 
 void
-Dbtux::printNode(Signal* signal, Frag& frag, NdbOut& out, TupLoc loc, PrintPar& par)
+Dbtux::printNode(Frag& frag, NdbOut& out, TupLoc loc, PrintPar& par)
 {
   if (loc == NullTupLoc) {
     par.m_depth = 0;
@@ -122,7 +122,7 @@ Dbtux::printNode(Signal* signal, Frag& frag, NdbOut& out, TupLoc loc, PrintPar&
   }
   TreeHead& tree = frag.m_tree;
   NodeHandle node(frag);
-  selectNode(signal, node, loc);
+  selectNode(node, loc);
   out << par.m_path << " " << node << endl;
   // check children
   PrintPar cpar[2];
@@ -132,7 +132,7 @@ Dbtux::printNode(Signal* signal, Frag& frag, NdbOut& out, TupLoc loc, PrintPar&
     cpar[i].m_side = i;
     cpar[i].m_depth = 0;
     cpar[i].m_parent = loc;
-    printNode(signal, frag, out, node.getLink(i), cpar[i]);
+    printNode(frag, out, node.getLink(i), cpar[i]);
     if (! cpar[i].m_ok) {
       par.m_ok = false;
     }
diff --git a/ndb/src/kernel/blocks/dbtux/DbtuxMaint.cpp b/ndb/src/kernel/blocks/dbtux/DbtuxMaint.cpp
index 565e64f9aeb..30afb51e7d7 100644
--- a/ndb/src/kernel/blocks/dbtux/DbtuxMaint.cpp
+++ b/ndb/src/kernel/blocks/dbtux/DbtuxMaint.cpp
@@ -117,7 +117,7 @@ Dbtux::execTUX_MAINT_REQ(Signal* signal)
   switch (opCode) {
   case TuxMaintReq::OpAdd:
     jam();
-    searchToAdd(signal, frag, c_searchKey, ent, treePos);
+    searchToAdd(frag, c_searchKey, ent, treePos);
 #ifdef VM_TRACE
     if (debugFlags & DebugMaint) {
       debugOut << treePos << (treePos.m_match ? " - error" : "") << endl;
@@ -133,8 +133,8 @@ Dbtux::execTUX_MAINT_REQ(Signal* signal)
       break;
     }
     /*
-     * At most one new node is inserted in the operation.  We keep one
-     * free node pre-allocated so the operation cannot fail.
+     * At most one new node is inserted in the operation.  Pre-allocate
+     * it so that the operation cannot fail.
      */
     if (frag.m_freeLoc == NullTupLoc) {
       jam();
@@ -144,14 +144,16 @@ Dbtux::execTUX_MAINT_REQ(Signal* signal)
         jam();
         break;
       }
+      // link to freelist
+      node.setLink(0, frag.m_freeLoc);
       frag.m_freeLoc = node.m_loc;
       ndbrequire(frag.m_freeLoc != NullTupLoc);
     }
-    treeAdd(signal, frag, treePos, ent);
+    treeAdd(frag, treePos, ent);
     break;
   case TuxMaintReq::OpRemove:
     jam();
-    searchToRemove(signal, frag, c_searchKey, ent, treePos);
+    searchToRemove(frag, c_searchKey, ent, treePos);
 #ifdef VM_TRACE
     if (debugFlags & DebugMaint) {
       debugOut << treePos << (! treePos.m_match ? " - error" : "") << endl;
@@ -166,7 +168,7 @@ Dbtux::execTUX_MAINT_REQ(Signal* signal)
       }
       break;
     }
-    treeRemove(signal, frag, treePos);
+    treeRemove(frag, treePos);
     break;
   default:
     ndbrequire(false);
diff --git a/ndb/src/kernel/blocks/dbtux/DbtuxNode.cpp b/ndb/src/kernel/blocks/dbtux/DbtuxNode.cpp
index 491c8a4c74f..389192fd0cf 100644
--- a/ndb/src/kernel/blocks/dbtux/DbtuxNode.cpp
+++ b/ndb/src/kernel/blocks/dbtux/DbtuxNode.cpp
@@ -42,7 +42,7 @@ Dbtux::allocNode(Signal* signal, NodeHandle& node)
  * Set handle to point to existing node.
  */
 void
-Dbtux::selectNode(Signal* signal, NodeHandle& node, TupLoc loc)
+Dbtux::selectNode(NodeHandle& node, TupLoc loc)
 {
   Frag& frag = node.m_frag;
   ndbrequire(loc != NullTupLoc);
@@ -57,15 +57,15 @@ Dbtux::selectNode(Signal* signal, NodeHandle& node, TupLoc loc)
 }
 
 /*
- * Set handle to point to new node.  Uses the pre-allocated node.
+ * Set handle to point to new node.  Uses a pre-allocated node.
  */
 void
-Dbtux::insertNode(Signal* signal, NodeHandle& node)
+Dbtux::insertNode(NodeHandle& node)
 {
   Frag& frag = node.m_frag;
-  TupLoc loc = frag.m_freeLoc;
-  frag.m_freeLoc = NullTupLoc;
-  selectNode(signal, node, loc);
+  // unlink from freelist
+  selectNode(node, frag.m_freeLoc);
+  frag.m_freeLoc = node.getLink(0);
   new (node.m_node) TreeNode();
 #ifdef VM_TRACE
   TreeHead& tree = frag.m_tree;
@@ -76,20 +76,17 @@ Dbtux::insertNode(Signal* signal, NodeHandle& node)
 }
 
 /*
- * Delete existing node.
+ * Delete existing node.  Simply put it on the freelist.
  */
 void
-Dbtux::deleteNode(Signal* signal, NodeHandle& node)
+Dbtux::deleteNode(NodeHandle& node)
 {
   Frag& frag = node.m_frag;
   ndbrequire(node.getOccup() == 0);
-  TupLoc loc = node.m_loc;
-  Uint32 pageId = loc.getPageId();
-  Uint32 pageOffset = loc.getPageOffset();
-  Uint32* node32 = reinterpret_cast<Uint32*>(node.m_node);
-  c_tup->tuxFreeNode(signal, frag.m_tupIndexFragPtrI, pageId, pageOffset, node32);
-  jamEntry();
-  // invalidate handle and storage
+  // link to freelist
+  node.setLink(0, frag.m_freeLoc);
+  frag.m_freeLoc = node.m_loc;
+  // invalidate the handle
   node.m_loc = NullTupLoc;
   node.m_node = 0;
 }
@@ -99,7 +96,7 @@ Dbtux::deleteNode(Signal* signal, NodeHandle& node)
  * attribute headers for now.  XXX use null mask instead
  */
 void
-Dbtux::setNodePref(Signal* signal, NodeHandle& node)
+Dbtux::setNodePref(NodeHandle& node)
 {
   const Frag& frag = node.m_frag;
   const TreeHead& tree = frag.m_tree;
@@ -121,7 +118,7 @@ Dbtux::setNodePref(Signal* signal, NodeHandle& node)
  * Add list of scans at the new entry.
  */
 void
-Dbtux::nodePushUp(Signal* signal, NodeHandle& node, unsigned pos, const TreeEnt& ent, Uint32 scanList)
+Dbtux::nodePushUp(NodeHandle& node, unsigned pos, const TreeEnt& ent, Uint32 scanList)
 {
   Frag& frag = node.m_frag;
   TreeHead& tree = frag.m_tree;
@@ -129,7 +126,7 @@ Dbtux::nodePushUp(Signal* signal, NodeHandle& node, unsigned pos, const TreeEnt&
   ndbrequire(occup < tree.m_maxOccup && pos <= occup);
   // fix old scans
   if (node.getNodeScan() != RNIL)
-    nodePushUpScans(signal, node, pos);
+    nodePushUpScans(node, pos);
   // fix node
   TreeEnt* const entList = tree.getEntList(node.m_node);
   entList[occup] = entList[0];
@@ -146,11 +143,11 @@ Dbtux::nodePushUp(Signal* signal, NodeHandle& node, unsigned pos, const TreeEnt&
     addScanList(node, pos, scanList);
   // fix prefix
   if (occup == 0 || pos == 0)
-    setNodePref(signal, node);
+    setNodePref(node);
 }
 
 void
-Dbtux::nodePushUpScans(Signal* signal, NodeHandle& node, unsigned pos)
+Dbtux::nodePushUpScans(NodeHandle& node, unsigned pos)
 {
   const unsigned occup = node.getOccup();
   ScanOpPtr scanPtr;
@@ -187,7 +184,7 @@ Dbtux::nodePushUpScans(Signal* signal, NodeHandle& node, unsigned pos)
  * else moved forward.
  */
 void
-Dbtux::nodePopDown(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent, Uint32* scanList)
+Dbtux::nodePopDown(NodeHandle& node, unsigned pos, TreeEnt& ent, Uint32* scanList)
 {
   Frag& frag = node.m_frag;
   TreeHead& tree = frag.m_tree;
@@ -196,12 +193,12 @@ Dbtux::nodePopDown(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent,
   if (node.getNodeScan() != RNIL) {
     // remove or move scans at this position
     if (scanList == 0)
-      moveScanList(signal, node, pos);
+      moveScanList(node, pos);
     else
       removeScanList(node, pos, *scanList);
     // fix other scans
     if (node.getNodeScan() != RNIL)
-      nodePopDownScans(signal, node, pos);
+      nodePopDownScans(node, pos);
   }
   // fix node
   TreeEnt* const entList = tree.getEntList(node.m_node);
@@ -216,11 +213,11 @@ Dbtux::nodePopDown(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent,
   node.setOccup(occup - 1);
   // fix prefix
   if (occup != 1 && pos == 0)
-    setNodePref(signal, node);
+    setNodePref(node);
 }
 
 void
-Dbtux::nodePopDownScans(Signal* signal, NodeHandle& node, unsigned pos)
+Dbtux::nodePopDownScans(NodeHandle& node, unsigned pos)
 {
   const unsigned occup = node.getOccup();
   ScanOpPtr scanPtr;
@@ -258,7 +255,7 @@ Dbtux::nodePopDownScans(Signal* signal, NodeHandle& node, unsigned pos)
  * Return list of scans at the removed position 0.
  */
 void
-Dbtux::nodePushDown(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent, Uint32& scanList)
+Dbtux::nodePushDown(NodeHandle& node, unsigned pos, TreeEnt& ent, Uint32& scanList)
 {
   Frag& frag = node.m_frag;
   TreeHead& tree = frag.m_tree;
@@ -269,7 +266,7 @@ Dbtux::nodePushDown(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent
     removeScanList(node, 0, scanList);
     // fix other scans
     if (node.getNodeScan() != RNIL)
-      nodePushDownScans(signal, node, pos);
+      nodePushDownScans(node, pos);
   }
   // fix node
   TreeEnt* const entList = tree.getEntList(node.m_node);
@@ -285,11 +282,11 @@ Dbtux::nodePushDown(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent
   entList[0] = entList[occup];
   // fix prefix
   if (true)
-    setNodePref(signal, node);
+    setNodePref(node);
 }
 
 void
-Dbtux::nodePushDownScans(Signal* signal, NodeHandle& node, unsigned pos)
+Dbtux::nodePushDownScans(NodeHandle& node, unsigned pos)
 {
   const unsigned occup = node.getOccup();
   ScanOpPtr scanPtr;
@@ -328,7 +325,7 @@ Dbtux::nodePushDownScans(Signal* signal, NodeHandle& node, unsigned pos)
  * Move scans at removed entry and add scans at the new entry.
  */
 void
-Dbtux::nodePopUp(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent, Uint32 scanList)
+Dbtux::nodePopUp(NodeHandle& node, unsigned pos, TreeEnt& ent, Uint32 scanList)
 {
   Frag& frag = node.m_frag;
   TreeHead& tree = frag.m_tree;
@@ -336,10 +333,10 @@ Dbtux::nodePopUp(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent, U
   ndbrequire(occup <= tree.m_maxOccup && pos < occup);
   if (node.getNodeScan() != RNIL) {
     // move scans whose entry disappears
-    moveScanList(signal, node, pos);
+    moveScanList(node, pos);
     // fix other scans
     if (node.getNodeScan() != RNIL)
-      nodePopUpScans(signal, node, pos);
+      nodePopUpScans(node, pos);
   }
   // fix node
   TreeEnt* const entList = tree.getEntList(node.m_node);
@@ -358,11 +355,11 @@ Dbtux::nodePopUp(Signal* signal, NodeHandle& node, unsigned pos, TreeEnt& ent, U
     addScanList(node, 0, scanList);
   // fix prefix
   if (true)
-    setNodePref(signal, node);
+    setNodePref(node);
 }
 
 void
-Dbtux::nodePopUpScans(Signal* signal, NodeHandle& node, unsigned pos)
+Dbtux::nodePopUpScans(NodeHandle& node, unsigned pos)
 {
   const unsigned occup = node.getOccup();
   ScanOpPtr scanPtr;
@@ -392,7 +389,7 @@ Dbtux::nodePopUpScans(Signal* signal, NodeHandle& node, unsigned pos)
  * (i=0) or after the max (i=1).  Expensive but not often used.
  */
 void
-Dbtux::nodeSlide(Signal* signal, NodeHandle& dstNode, NodeHandle& srcNode, unsigned cnt, unsigned i)
+Dbtux::nodeSlide(NodeHandle& dstNode, NodeHandle& srcNode, unsigned cnt, unsigned i)
 {
   Frag& frag = dstNode.m_frag;
   TreeHead& tree = frag.m_tree;
@@ -400,8 +397,8 @@ Dbtux::nodeSlide(Signal* signal, NodeHandle& dstNode, NodeHandle& srcNode, unsig
   while (cnt != 0) {
     TreeEnt ent;
     Uint32 scanList = RNIL;
-    nodePopDown(signal, srcNode, i == 0 ? srcNode.getOccup() - 1 : 0, ent, &scanList);
-    nodePushUp(signal, dstNode, i == 0 ? 0 : dstNode.getOccup(), ent, scanList);
+    nodePopDown(srcNode, i == 0 ? srcNode.getOccup() - 1 : 0, ent, &scanList);
+    nodePushUp(dstNode, i == 0 ? 0 : dstNode.getOccup(), ent, scanList);
     cnt--;
   }
 }
@@ -476,7 +473,7 @@ Dbtux::removeScanList(NodeHandle& node, unsigned pos, Uint32& scanList)
  * method scanNext().
  */
 void
-Dbtux::moveScanList(Signal* signal, NodeHandle& node, unsigned pos)
+Dbtux::moveScanList(NodeHandle& node, unsigned pos)
 {
   ScanOpPtr scanPtr;
   scanPtr.i = node.getNodeScan();
@@ -494,7 +491,7 @@ Dbtux::moveScanList(Signal* signal, NodeHandle& node, unsigned pos)
         debugOut << "At pos=" << pos << " " << node << endl;
       }
 #endif
-      scanNext(signal, scanPtr);
+      scanNext(scanPtr);
       ndbrequire(! (scanPos.m_loc == node.m_loc && scanPos.m_pos == pos));
     }
     scanPtr.i = nextPtrI;
diff --git a/ndb/src/kernel/blocks/dbtux/DbtuxScan.cpp b/ndb/src/kernel/blocks/dbtux/DbtuxScan.cpp
index 2235b0b80b6..c58dec2f102 100644
--- a/ndb/src/kernel/blocks/dbtux/DbtuxScan.cpp
+++ b/ndb/src/kernel/blocks/dbtux/DbtuxScan.cpp
@@ -275,7 +275,7 @@ Dbtux::execNEXT_SCANREQ(Signal* signal)
       jam();
       const TupLoc loc = scan.m_scanPos.m_loc;
       NodeHandle node(frag);
-      selectNode(signal, node, loc);
+      selectNode(node, loc);
       unlinkScan(node, scanPtr);
       scan.m_scanPos.m_loc = NullTupLoc;
     }
@@ -364,7 +364,7 @@ Dbtux::execACC_CHECK_SCAN(Signal* signal)
   if (scan.m_state == ScanOp::First) {
     jam();
     // search is done only once in single range scan
-    scanFirst(signal, scanPtr);
+    scanFirst(scanPtr);
 #ifdef VM_TRACE
     if (debugFlags & DebugScan) {
       debugOut << "First scan " << scanPtr.i << " " << scan << endl;
@@ -374,7 +374,7 @@ Dbtux::execACC_CHECK_SCAN(Signal* signal)
   if (scan.m_state == ScanOp::Next) {
     jam();
     // look for next
-    scanNext(signal, scanPtr);
+    scanNext(scanPtr);
   }
   // for reading tuple key in Current or Locked state
   Data pkData = c_dataBuffer;
@@ -680,7 +680,7 @@ Dbtux::execACC_ABORTCONF(Signal* signal)
  * by scanNext.
  */
 void
-Dbtux::scanFirst(Signal* signal, ScanOpPtr scanPtr)
+Dbtux::scanFirst(ScanOpPtr scanPtr)
 {
   ScanOp& scan = *scanPtr.p;
   Frag& frag = *c_fragPool.getPtr(scan.m_fragPtrI);
@@ -698,7 +698,7 @@ Dbtux::scanFirst(Signal* signal, ScanOpPtr scanPtr)
   }
   // search for scan start position
   TreePos treePos;
-  searchToScan(signal, frag, c_dataBuffer, scan.m_boundCnt[0], treePos);
+  searchToScan(frag, c_dataBuffer, scan.m_boundCnt[0], treePos);
   if (treePos.m_loc == NullTupLoc) {
     // empty tree
     jam();
@@ -710,7 +710,7 @@ Dbtux::scanFirst(Signal* signal, ScanOpPtr scanPtr)
   scan.m_state = ScanOp::Next;
   // link the scan to node found
   NodeHandle node(frag);
-  selectNode(signal, node, treePos.m_loc);
+  selectNode(node, treePos.m_loc);
   linkScan(node, scanPtr);
 }
 
@@ -730,7 +730,7 @@ Dbtux::scanFirst(Signal* signal, ScanOpPtr scanPtr)
  * re-organizations need not worry about scan direction.
  */
 void
-Dbtux::scanNext(Signal* signal, ScanOpPtr scanPtr)
+Dbtux::scanNext(ScanOpPtr scanPtr)
 {
   ScanOp& scan = *scanPtr.p;
   Frag& frag = *c_fragPool.getPtr(scan.m_fragPtrI);
@@ -739,20 +739,8 @@ Dbtux::scanNext(Signal* signal, ScanOpPtr scanPtr)
     debugOut << "Next in scan " << scanPtr.i << " " << scan << endl;
   }
 #endif
-  if (scan.m_state == ScanOp::Locked) {
-    jam();
-    // version of a tuple locked by us cannot disappear (assert only)
-    ndbassert(false);
-    AccLockReq* const lockReq = (AccLockReq*)signal->getDataPtrSend();
-    lockReq->returnCode = RNIL;
-    lockReq->requestInfo = AccLockReq::Unlock;
-    lockReq->accOpPtr = scan.m_accLockOp;
-    EXECUTE_DIRECT(DBACC, GSN_ACC_LOCKREQ, signal, AccLockReq::UndoSignalLength);
-    jamEntry();
-    ndbrequire(lockReq->returnCode == AccLockReq::Success);
-    scan.m_accLockOp = RNIL;
-    scan.m_state = ScanOp::Current;
-  }
+  // cannot be moved away from tuple we have locked
+  ndbrequire(scan.m_state != ScanOp::Locked);
   // set up index keys for this operation
   setKeyAttrs(frag);
   // unpack upper bound into c_dataBuffer
@@ -768,7 +756,7 @@ Dbtux::scanNext(Signal* signal, ScanOpPtr scanPtr)
   TreePos pos = scan.m_scanPos;
   // get and remember original node
   NodeHandle origNode(frag);
-  selectNode(signal, origNode, pos.m_loc);
+  selectNode(origNode, pos.m_loc);
   ndbrequire(islinkScan(origNode, scanPtr));
   // current node in loop
   NodeHandle node = origNode;
@@ -785,7 +773,7 @@ Dbtux::scanNext(Signal* signal, ScanOpPtr scanPtr)
     }
     if (node.m_loc != pos.m_loc) {
       jam();
-      selectNode(signal, node, pos.m_loc);
+      selectNode(node, pos.m_loc);
     }
     if (pos.m_dir == 4) {
       // coming down from parent proceed to left child
@@ -833,7 +821,7 @@ Dbtux::scanNext(Signal* signal, ScanOpPtr scanPtr)
           break;
         }
         // can we see it
-        if (! scanVisible(signal, scanPtr, ent)) {
+        if (! scanVisible(scanPtr, ent)) {
           jam();
           continue;
         }
@@ -896,7 +884,7 @@ Dbtux::scanNext(Signal* signal, ScanOpPtr scanPtr)
  * which are not analyzed or handled yet.
  */
 bool
-Dbtux::scanVisible(Signal* signal, ScanOpPtr scanPtr, TreeEnt ent)
+Dbtux::scanVisible(ScanOpPtr scanPtr, TreeEnt ent)
 {
   const ScanOp& scan = *scanPtr.p;
   const Frag& frag = *c_fragPool.getPtr(scan.m_fragPtrI);
diff --git a/ndb/src/kernel/blocks/dbtux/DbtuxSearch.cpp b/ndb/src/kernel/blocks/dbtux/DbtuxSearch.cpp
index 6693610524b..0f4b0862960 100644
--- a/ndb/src/kernel/blocks/dbtux/DbtuxSearch.cpp
+++ b/ndb/src/kernel/blocks/dbtux/DbtuxSearch.cpp
@@ -25,7 +25,7 @@
  * TODO optimize for initial equal attrs in node min/max
  */
 void
-Dbtux::searchToAdd(Signal* signal, Frag& frag, ConstData searchKey, TreeEnt searchEnt, TreePos& treePos)
+Dbtux::searchToAdd(Frag& frag, ConstData searchKey, TreeEnt searchEnt, TreePos& treePos)
 {
   const TreeHead& tree = frag.m_tree;
   const unsigned numAttrs = frag.m_numAttrs;
@@ -46,7 +46,7 @@ Dbtux::searchToAdd(Signal* signal, Frag& frag, ConstData searchKey, TreeEnt sear
   NodeHandle bottomNode(frag);
   while (true) {
     jam();
-    selectNode(signal, currNode, currNode.m_loc);
+    selectNode(currNode, currNode.m_loc);
     int ret;
     // compare prefix
     unsigned start = 0;
@@ -164,7 +164,7 @@ Dbtux::searchToAdd(Signal* signal, Frag& frag, ConstData searchKey, TreeEnt sear
  * to it.
  */
 void
-Dbtux::searchToRemove(Signal* signal, Frag& frag, ConstData searchKey, TreeEnt searchEnt, TreePos& treePos)
+Dbtux::searchToRemove(Frag& frag, ConstData searchKey, TreeEnt searchEnt, TreePos& treePos)
 {
   const TreeHead& tree = frag.m_tree;
   const unsigned numAttrs = frag.m_numAttrs;
@@ -182,7 +182,7 @@ Dbtux::searchToRemove(Signal* signal, Frag& frag, ConstData searchKey, TreeEnt s
   NodeHandle glbNode(frag);     // potential g.l.b of final node
   while (true) {
     jam();
-    selectNode(signal, currNode, currNode.m_loc);
+    selectNode(currNode, currNode.m_loc);
     int ret;
     // compare prefix
     unsigned start = 0;
@@ -256,7 +256,7 @@ Dbtux::searchToRemove(Signal* signal, Frag& frag, ConstData searchKey, TreeEnt s
  * Similar to searchToAdd.
  */
 void
-Dbtux::searchToScan(Signal* signal, Frag& frag, ConstData boundInfo, unsigned boundCount, TreePos& treePos)
+Dbtux::searchToScan(Frag& frag, ConstData boundInfo, unsigned boundCount, TreePos& treePos)
 {
   const TreeHead& tree = frag.m_tree;
   NodeHandle currNode(frag);
@@ -271,7 +271,7 @@ Dbtux::searchToScan(Signal* signal, Frag& frag, ConstData boundInfo, unsigned bo
   NodeHandle bottomNode(frag);
   while (true) {
     jam();
-    selectNode(signal, currNode, currNode.m_loc);
+    selectNode(currNode, currNode.m_loc);
     int ret;
     // compare prefix
     ret = cmpScanBound(frag, 0, boundInfo, boundCount, currNode.getPref(), tree.m_prefSize);
diff --git a/ndb/src/kernel/blocks/dbtux/DbtuxTree.cpp b/ndb/src/kernel/blocks/dbtux/DbtuxTree.cpp
index 392e571debe..b9e3b593a00 100644
--- a/ndb/src/kernel/blocks/dbtux/DbtuxTree.cpp
+++ b/ndb/src/kernel/blocks/dbtux/DbtuxTree.cpp
@@ -22,27 +22,27 @@
  * is the common case given slack in nodes.
  */
 void
-Dbtux::treeAdd(Signal* signal, Frag& frag, TreePos treePos, TreeEnt ent)
+Dbtux::treeAdd(Frag& frag, TreePos treePos, TreeEnt ent)
 {
   TreeHead& tree = frag.m_tree;
   NodeHandle node(frag);
   if (treePos.m_loc != NullTupLoc) {
     // non-empty tree
     jam();
-    selectNode(signal, node, treePos.m_loc);
+    selectNode(node, treePos.m_loc);
     unsigned pos = treePos.m_pos;
     if (node.getOccup() < tree.m_maxOccup) {
       // node has room
       jam();
-      nodePushUp(signal, node, pos, ent, RNIL);
+      nodePushUp(node, pos, ent, RNIL);
       return;
     }
-    treeAddFull(signal, frag, node, pos, ent);
+    treeAddFull(frag, node, pos, ent);
     return;
   }
   jam();
-  insertNode(signal, node);
-  nodePushUp(signal, node, 0, ent, RNIL);
+  insertNode(node);
+  nodePushUp(node, 0, ent, RNIL);
   node.setSide(2);
   tree.m_root = node.m_loc;
 }
@@ -53,7 +53,7 @@ Dbtux::treeAdd(Signal* signal, Frag& frag, TreePos treePos, TreeEnt ent)
  * entry of this node.  The min entry could be the entry to add.
  */
 void
-Dbtux::treeAddFull(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos, TreeEnt ent)
+Dbtux::treeAddFull(Frag& frag, NodeHandle lubNode, unsigned pos, TreeEnt ent)
 {
   TreeHead& tree = frag.m_tree;
   TupLoc loc = lubNode.getLink(0);
@@ -62,7 +62,7 @@ Dbtux::treeAddFull(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos,
     NodeHandle glbNode(frag);
     do {
       jam();
-      selectNode(signal, glbNode, loc);
+      selectNode(glbNode, loc);
       loc = glbNode.getLink(1);
     } while (loc != NullTupLoc);
     if (glbNode.getOccup() < tree.m_maxOccup) {
@@ -72,16 +72,16 @@ Dbtux::treeAddFull(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos,
       if (pos != 0) {
         jam();
         // add the new entry and return min entry
-        nodePushDown(signal, lubNode, pos - 1, ent, scanList);
+        nodePushDown(lubNode, pos - 1, ent, scanList);
       }
       // g.l.b node receives min entry from l.u.b node
-      nodePushUp(signal, glbNode, glbNode.getOccup(), ent, scanList);
+      nodePushUp(glbNode, glbNode.getOccup(), ent, scanList);
       return;
     }
-    treeAddNode(signal, frag, lubNode, pos, ent, glbNode, 1);
+    treeAddNode(frag, lubNode, pos, ent, glbNode, 1);
     return;
   }
-  treeAddNode(signal, frag, lubNode, pos, ent, lubNode, 0);
+  treeAddNode(frag, lubNode, pos, ent, lubNode, 0);
 }
 
 /*
@@ -90,10 +90,10 @@ Dbtux::treeAddFull(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos,
  * becomes the new g.l.b node.
  */
 void
-Dbtux::treeAddNode(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos, TreeEnt ent, NodeHandle parentNode, unsigned i)
+Dbtux::treeAddNode(Frag& frag, NodeHandle lubNode, unsigned pos, TreeEnt ent, NodeHandle parentNode, unsigned i)
 {
   NodeHandle glbNode(frag);
-  insertNode(signal, glbNode);
+  insertNode(glbNode);
   // connect parent and child
   parentNode.setLink(i, glbNode.m_loc);
   glbNode.setLink(2, parentNode.m_loc);
@@ -102,12 +102,12 @@ Dbtux::treeAddNode(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos,
   if (pos != 0) {
     jam();
     // add the new entry and return min entry
-    nodePushDown(signal, lubNode, pos - 1, ent, scanList);
+    nodePushDown(lubNode, pos - 1, ent, scanList);
   }
   // g.l.b node receives min entry from l.u.b node
-  nodePushUp(signal, glbNode, 0, ent, scanList);
+  nodePushUp(glbNode, 0, ent, scanList);
   // re-balance the tree
-  treeAddRebalance(signal, frag, parentNode, i);
+  treeAddRebalance(frag, parentNode, i);
 }
 
 /*
@@ -115,7 +115,7 @@ Dbtux::treeAddNode(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos,
  * parent of the added node.
  */
 void
-Dbtux::treeAddRebalance(Signal* signal, Frag& frag, NodeHandle node, unsigned i)
+Dbtux::treeAddRebalance(Frag& frag, NodeHandle node, unsigned i)
 {
   while (true) {
     // height of subtree i has increased by 1
@@ -136,14 +136,14 @@ Dbtux::treeAddRebalance(Signal* signal, Frag& frag, NodeHandle node, unsigned i)
       // height of longer subtree increased
       jam();
       NodeHandle childNode(frag);
-      selectNode(signal, childNode, node.getLink(i));
+      selectNode(childNode, node.getLink(i));
       int b2 = childNode.getBalance();
       if (b2 == b) {
         jam();
-        treeRotateSingle(signal, frag, node, i);
+        treeRotateSingle(frag, node, i);
       } else if (b2 == -b) {
         jam();
-        treeRotateDouble(signal, frag, node, i);
+        treeRotateDouble(frag, node, i);
       } else {
         // height of subtree increased so it cannot be perfectly balanced
         ndbrequire(false);
@@ -160,7 +160,7 @@ Dbtux::treeAddRebalance(Signal* signal, Frag& frag, NodeHandle node, unsigned i)
       break;
     }
     i = node.getSide();
-    selectNode(signal, node, parentLoc);
+    selectNode(node, parentLoc);
   }
 }
 
@@ -171,38 +171,38 @@ Dbtux::treeAddRebalance(Signal* signal, Frag& frag, NodeHandle node, unsigned i)
  * not need to consider merge of semi-leaf and leaf.
  */
 void
-Dbtux::treeRemove(Signal* signal, Frag& frag, TreePos treePos)
+Dbtux::treeRemove(Frag& frag, TreePos treePos)
 {
   TreeHead& tree = frag.m_tree;
   unsigned pos = treePos.m_pos;
   NodeHandle node(frag);
-  selectNode(signal, node, treePos.m_loc);
+  selectNode(node, treePos.m_loc);
   TreeEnt ent;
   if (node.getOccup() > tree.m_minOccup) {
     // no underflow in any node type
     jam();
-    nodePopDown(signal, node, pos, ent, 0);
+    nodePopDown(node, pos, ent, 0);
     return;
   }
   if (node.getChilds() == 2) {
     // underflow in interior node
     jam();
-    treeRemoveInner(signal, frag, node, pos);
+    treeRemoveInner(frag, node, pos);
     return;
   }
   // remove entry in semi/leaf
-  nodePopDown(signal, node, pos, ent, 0);
+  nodePopDown(node, pos, ent, 0);
   if (node.getLink(0) != NullTupLoc) {
     jam();
-    treeRemoveSemi(signal, frag, node, 0);
+    treeRemoveSemi(frag, node, 0);
     return;
   }
   if (node.getLink(1) != NullTupLoc) {
     jam();
-    treeRemoveSemi(signal, frag, node, 1);
+    treeRemoveSemi(frag, node, 1);
     return;
   }
-  treeRemoveLeaf(signal, frag, node);
+  treeRemoveLeaf(frag, node);
 }
 
 /*
@@ -211,7 +211,7 @@ Dbtux::treeRemove(Signal* signal, Frag& frag, TreePos treePos)
  * node becomes the min entry of this node.
  */
 void
-Dbtux::treeRemoveInner(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned pos)
+Dbtux::treeRemoveInner(Frag& frag, NodeHandle lubNode, unsigned pos)
 {
   TreeHead& tree = frag.m_tree;
   TreeEnt ent;
@@ -220,19 +220,19 @@ Dbtux::treeRemoveInner(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned
   TupLoc loc = lubNode.getLink(0);
   do {
     jam();
-    selectNode(signal, glbNode, loc);
+    selectNode(glbNode, loc);
     loc = glbNode.getLink(1);
   } while (loc != NullTupLoc);
   // borrow max entry from semi/leaf
   Uint32 scanList = RNIL;
-  nodePopDown(signal, glbNode, glbNode.getOccup() - 1, ent, &scanList);
-  nodePopUp(signal, lubNode, pos, ent, scanList);
+  nodePopDown(glbNode, glbNode.getOccup() - 1, ent, &scanList);
+  nodePopUp(lubNode, pos, ent, scanList);
   if (glbNode.getLink(0) != NullTupLoc) {
     jam();
-    treeRemoveSemi(signal, frag, glbNode, 0);
+    treeRemoveSemi(frag, glbNode, 0);
     return;
   }
-  treeRemoveLeaf(signal, frag, glbNode);
+  treeRemoveLeaf(frag, glbNode);
 }
 
 /*
@@ -241,21 +241,21 @@ Dbtux::treeRemoveInner(Signal* signal, Frag& frag, NodeHandle lubNode, unsigned
  * The leaf may become empty.
  */
 void
-Dbtux::treeRemoveSemi(Signal* signal, Frag& frag, NodeHandle semiNode, unsigned i)
+Dbtux::treeRemoveSemi(Frag& frag, NodeHandle semiNode, unsigned i)
 {
   TreeHead& tree = frag.m_tree;
   ndbrequire(semiNode.getChilds() < 2);
   TupLoc leafLoc = semiNode.getLink(i);
   NodeHandle leafNode(frag);
-  selectNode(signal, leafNode, leafLoc);
+  selectNode(leafNode, leafLoc);
   if (semiNode.getOccup() < tree.m_minOccup) {
     jam();
     unsigned cnt = min(leafNode.getOccup(), tree.m_minOccup - semiNode.getOccup());
-    nodeSlide(signal, semiNode, leafNode, cnt, i);
+    nodeSlide(semiNode, leafNode, cnt, i);
     if (leafNode.getOccup() == 0) {
       // remove empty leaf
       jam();
-      treeRemoveNode(signal, frag, leafNode);
+      treeRemoveNode(frag, leafNode);
     }
   }
 }
@@ -266,14 +266,14 @@ Dbtux::treeRemoveSemi(Signal* signal, Frag& frag, NodeHandle semiNode, unsigned
  * do nothing.
  */
 void
-Dbtux::treeRemoveLeaf(Signal* signal, Frag& frag, NodeHandle leafNode)
+Dbtux::treeRemoveLeaf(Frag& frag, NodeHandle leafNode)
 {
   TreeHead& tree = frag.m_tree;
   TupLoc parentLoc = leafNode.getLink(2);
   if (parentLoc != NullTupLoc) {
     jam();
     NodeHandle parentNode(frag);
-    selectNode(signal, parentNode, parentLoc);
+    selectNode(parentNode, parentLoc);
     unsigned i = leafNode.getSide();
     if (parentNode.getLink(1 - i) == NullTupLoc) {
       // parent is semi-leaf
@@ -281,14 +281,14 @@ Dbtux::treeRemoveLeaf(Signal* signal, Frag& frag, NodeHandle leafNode)
       if (parentNode.getOccup() < tree.m_minOccup) {
         jam();
         unsigned cnt = min(leafNode.getOccup(), tree.m_minOccup - parentNode.getOccup());
-        nodeSlide(signal, parentNode, leafNode, cnt, i);
+        nodeSlide(parentNode, leafNode, cnt, i);
       }
     }
   }
   if (leafNode.getOccup() == 0) {
     jam();
     // remove empty leaf
-    treeRemoveNode(signal, frag, leafNode);
+    treeRemoveNode(frag, leafNode);
   }
 }
 
@@ -296,20 +296,20 @@ Dbtux::treeRemoveLeaf(Signal* signal, Frag& frag, NodeHandle leafNode)
  * Remove empty leaf.
  */
 void
-Dbtux::treeRemoveNode(Signal* signal, Frag& frag, NodeHandle leafNode)
+Dbtux::treeRemoveNode(Frag& frag, NodeHandle leafNode)
 {
   TreeHead& tree = frag.m_tree;
   ndbrequire(leafNode.getChilds() == 0);
   TupLoc parentLoc = leafNode.getLink(2);
   unsigned i = leafNode.getSide();
-  deleteNode(signal, leafNode);
+  deleteNode(leafNode);
   if (parentLoc != NullTupLoc) {
     jam();
     NodeHandle parentNode(frag);
-    selectNode(signal, parentNode, parentLoc);
+    selectNode(parentNode, parentLoc);
     parentNode.setLink(i, NullTupLoc);
     // re-balance the tree
-    treeRemoveRebalance(signal, frag, parentNode, i);
+    treeRemoveRebalance(frag, parentNode, i);
     return;
   }
   // tree is now empty
@@ -321,7 +321,7 @@ Dbtux::treeRemoveNode(Signal* signal, Frag& frag, NodeHandle leafNode)
  * parent of the removed node.
  */
 void
-Dbtux::treeRemoveRebalance(Signal* signal, Frag& frag, NodeHandle node, unsigned i)
+Dbtux::treeRemoveRebalance(Frag& frag, NodeHandle node, unsigned i)
 {
   while (true) {
     // height of subtree i has decreased by 1
@@ -343,19 +343,19 @@ Dbtux::treeRemoveRebalance(Signal* signal, Frag& frag, NodeHandle node, unsigned
       jam();
       // child on the other side
       NodeHandle childNode(frag);
-      selectNode(signal, childNode, node.getLink(1 - i));
+      selectNode(childNode, node.getLink(1 - i));
       int b2 = childNode.getBalance();
       if (b2 == b) {
         jam();
-        treeRotateSingle(signal, frag, node, 1 - i);
+        treeRotateSingle(frag, node, 1 - i);
         // height of tree decreased and propagates up
       } else if (b2 == -b) {
         jam();
-        treeRotateDouble(signal, frag, node, 1 - i);
+        treeRotateDouble(frag, node, 1 - i);
         // height of tree decreased and propagates up
       } else {
         jam();
-        treeRotateSingle(signal, frag, node, 1 - i);
+        treeRotateSingle(frag, node, 1 - i);
         // height of tree did not change - done
         return;
       }
@@ -369,7 +369,7 @@ Dbtux::treeRemoveRebalance(Signal* signal, Frag& frag, NodeHandle node, unsigned
       return;
     }
     i = node.getSide();
-    selectNode(signal, node, parentLoc);
+    selectNode(node, parentLoc);
   }
 }
 
@@ -390,10 +390,7 @@ Dbtux::treeRemoveRebalance(Signal* signal, Frag& frag, NodeHandle node, unsigned
  * all optional. If 4 are there it changes side.
 */
 void
-Dbtux::treeRotateSingle(Signal* signal,
-                        Frag& frag,
-                        NodeHandle& node,
-                        unsigned i)
+Dbtux::treeRotateSingle(Frag& frag, NodeHandle& node, unsigned i)
 {
   ndbrequire(i <= 1);
   /*
@@ -413,7 +410,7 @@ Dbtux::treeRotateSingle(Signal* signal,
   */
   TupLoc loc3 = node5.getLink(i);
   NodeHandle node3(frag);
-  selectNode(signal, node3, loc3);
+  selectNode(node3, loc3);
   const int bal3 = node3.getBalance();
   /*
   2 must always be there but is not changed. Thus we mereley check that it
@@ -430,7 +427,7 @@ Dbtux::treeRotateSingle(Signal* signal,
   NodeHandle node4(frag);
   if (loc4 != NullTupLoc) {
     jam();
-    selectNode(signal, node4, loc4);
+    selectNode(node4, loc4);
     ndbrequire(node4.getSide() == (1 - i) &&
                node4.getLink(2) == loc3);
     node4.setSide(i);
@@ -465,7 +462,7 @@ Dbtux::treeRotateSingle(Signal* signal,
   if (loc0 != NullTupLoc) {
     jam();
     NodeHandle node0(frag);
-    selectNode(signal, node0, loc0);
+    selectNode(node0, loc0);
     node0.setLink(side5, loc3);
   } else {
     jam();
@@ -602,7 +599,7 @@ Dbtux::treeRotateSingle(Signal* signal,
  *
  */
 void
-Dbtux::treeRotateDouble(Signal* signal, Frag& frag, NodeHandle& node, unsigned i)
+Dbtux::treeRotateDouble(Frag& frag, NodeHandle& node, unsigned i)
 {
   TreeHead& tree = frag.m_tree;
 
@@ -616,13 +613,13 @@ Dbtux::treeRotateDouble(Signal* signal, Frag& frag, NodeHandle& node, unsigned i
   // level 1
   TupLoc loc2 = node6.getLink(i);
   NodeHandle node2(frag);
-  selectNode(signal, node2, loc2);
+  selectNode(node2, loc2);
   const int bal2 = node2.getBalance();
 
   // level 2
   TupLoc loc4 = node2.getLink(1 - i);
   NodeHandle node4(frag);
-  selectNode(signal, node4, loc4);
+  selectNode(node4, loc4);
   const int bal4 = node4.getBalance();
 
   ndbrequire(i <= 1);
@@ -643,7 +640,7 @@ Dbtux::treeRotateDouble(Signal* signal, Frag& frag, NodeHandle& node, unsigned i
       jam();
       unsigned cnt = tree.m_minOccup - node4.getOccup();
       ndbrequire(cnt < node2.getOccup());
-      nodeSlide(signal, node4, node2, cnt, i);
+      nodeSlide(node4, node2, cnt, i);
       ndbrequire(node4.getOccup() >= tree.m_minOccup);
       ndbrequire(node2.getOccup() != 0);
     }
@@ -651,14 +648,14 @@ Dbtux::treeRotateDouble(Signal* signal, Frag& frag, NodeHandle& node, unsigned i
     if (loc3 != NullTupLoc) {
       jam();
       NodeHandle node3(frag);
-      selectNode(signal, node3, loc3);
+      selectNode(node3, loc3);
       node3.setLink(2, loc2);
       node3.setSide(1 - i);
     }
     if (loc5 != NullTupLoc) {
       jam();
       NodeHandle node5(frag);
-      selectNode(signal, node5, loc5);
+      selectNode(node5, loc5);
       node5.setLink(2, node6.m_loc);
       node5.setSide(i);
     }
@@ -681,7 +678,7 @@ Dbtux::treeRotateDouble(Signal* signal, Frag& frag, NodeHandle& node, unsigned i
 
   if (loc0 != NullTupLoc) {
     jam();
-    selectNode(signal, node0, loc0);
+    selectNode(node0, loc0);
     node0.setLink(side6, loc4);
   } else {
     jam();