diff --git a/examples/ex3.c b/examples/ex3.c
index e4f5afd..6224fa0 100644
--- a/examples/ex3.c
+++ b/examples/ex3.c
@@ -203,12 +203,14 @@ int main (int argc, char ** argv) {
   {
     stasis_operation_impl op_ins = {
       TREE_INSERT,
+      UNKNOWN_TYPE_PAGE,
       OPERATION_NOOP,
       TREE_REMOVE,
       op_tree_insert
     };
     stasis_operation_impl op_rem = {
       TREE_REMOVE,
+      UNKNOWN_TYPE_PAGE,
       OPERATION_NOOP,
       TREE_INSERT,
       op_tree_remove
diff --git a/src/stasis/bufferManager.c b/src/stasis/bufferManager.c
index dd328f6..b7eb1d2 100644
--- a/src/stasis/bufferManager.c
+++ b/src/stasis/bufferManager.c
@@ -187,6 +187,23 @@ Page * loadUninitializedPage(int xid, pageid_t pageid) {
 
   return loadUninitPageImpl(xid, pageid);
 }
+
+Page * loadPageForOperation(int xid, pageid_t pageid, int op) {
+  pagetype_t type = stasis_operation_type(op);
+  Page * p;
+  if(pageid == SEGMENT_PAGEID) {
+    assert(type = SEGMENT_PAGE);
+    p = 0;
+  } else if(type == UNINITIALIZED_PAGE) {
+    p = loadUninitializedPage(xid, pageid);
+  } else if(type == UNKNOWN_TYPE_PAGE) {
+    p = loadPage(xid, pageid);
+  } else {
+    p = loadPageOfType(xid, pageid, type);
+  }
+  return p;
+}
+
 Page * getCachedPage(int xid, pageid_t pageid) {
   return getCachedPageImpl(xid, pageid);
 }
diff --git a/src/stasis/bufferManager/legacy/legacyBufferManager.c b/src/stasis/bufferManager/legacy/legacyBufferManager.c
index b73cbc4..f4d6ec3 100644
--- a/src/stasis/bufferManager/legacy/legacyBufferManager.c
+++ b/src/stasis/bufferManager/legacy/legacyBufferManager.c
@@ -22,6 +22,7 @@ static pthread_key_t lastPage;
 
 static void bufManBufDeinit();
 static compensated_function Page *bufManLoadPage(int xid, pageid_t pageid, pagetype_t type);
+static compensated_function Page *bufManGetCachedPage(int xid, pageid_t pageid);
 static compensated_function Page *bufManLoadUninitPage(int xid, pageid_t pageid);
 static void bufManReleasePage (Page * p);
 static void bufManSimulateBufferManagerCrash();
@@ -45,7 +46,7 @@ int stasis_buffer_manager_deprecated_open(stasis_page_handle_t * ph) {
     releasePageImpl = bufManReleasePage;
     loadPageImpl = bufManLoadPage;
     loadUninitPageImpl = bufManLoadUninitPage;
-    getCachedPageImpl = bufManLoadPage; // Since this code is deprecated, loadPage is "good enough" though it breaks segments.
+    getCachedPageImpl = bufManGetCachedPage;
     writeBackPage = pageWrite_legacyWrapper;
     forcePages = forcePageFile_legacyWrapper;
     forcePageRange = forceRangePageFile_legacyWrapper;
@@ -335,8 +336,7 @@ static Page* bufManGetPage(pageid_t pageid, int locktype, int uninitialized, pag
   return ret;
 }
 
-
-static compensated_function Page *bufManLoadPage(int xid, pageid_t pageid, pagetype_t type) {
+static compensated_function Page *bufManLoadPage(int xid, const pageid_t pageid, pagetype_t type) {
 
   Page * ret = pthread_getspecific(lastPage);
 
@@ -367,6 +367,11 @@ static compensated_function Page *bufManLoadPage(int xid, pageid_t pageid, paget
   return ret;
 }
 
+static Page* bufManGetCachedPage(int xid, const pageid_t pageid) {
+  // XXX hack; but this code is deprecated
+  return bufManLoadPage(xid, pageid, UNKNOWN_TYPE_PAGE);
+}
+
 static compensated_function Page *bufManLoadUninitPage(int xid, pageid_t pageid) {
 
   Page * ret = pthread_getspecific(lastPage);
diff --git a/src/stasis/bufferManager/pageArray.c b/src/stasis/bufferManager/pageArray.c
index 2168dc6..03affbe 100644
--- a/src/stasis/bufferManager/pageArray.c
+++ b/src/stasis/bufferManager/pageArray.c
@@ -40,7 +40,9 @@ static Page * paLoadPage(int xid, pageid_t pageid, pagetype_t type) {
   pthread_mutex_unlock(&pageArray_mut);
   return pageMap[pageid];
 }
-
+static Page* paGetCachedPage(int xid, pageid_t page) {
+  return paLoadPage(xid, page, UNKNOWN_TYPE_PAGE);
+}
 static void paReleasePage(Page * p) {
   stasis_dirty_page_table_set_clean(stasis_dirty_page_table, p);
 }
@@ -62,7 +64,7 @@ void stasis_buffer_manager_mem_array_open () {
 
   releasePageImpl = paReleasePage;
   loadPageImpl = paLoadPage;
-  getCachedPageImpl = paLoadPage;
+  getCachedPageImpl = paGetCachedPage;
   writeBackPage = paWriteBackPage;
   forcePages = paForcePages;
   stasis_buffer_manager_close = paBufDeinit;
diff --git a/src/stasis/operations.c b/src/stasis/operations.c
index 5d7caf3..d87acdc 100644
--- a/src/stasis/operations.c
+++ b/src/stasis/operations.c
@@ -193,3 +193,6 @@ void stasis_operation_undo(const LogEntry * e, lsn_t effective_lsn, Page * p) {
     }
   }
 }
+pagetype_t stasis_operation_type(int op) {
+  return stasis_operation_table[op].page_type;
+}
diff --git a/src/stasis/operations/alloc.c b/src/stasis/operations/alloc.c
index 504970e..cc060e2 100644
--- a/src/stasis/operations/alloc.c
+++ b/src/stasis/operations/alloc.c
@@ -167,6 +167,7 @@ static pthread_mutex_t talloc_mutex = PTHREAD_MUTEX_INITIALIZER;
 stasis_operation_impl stasis_op_impl_alloc() {
   stasis_operation_impl o = {
     OPERATION_ALLOC,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_ALLOC,
     OPERATION_DEALLOC,
     op_alloc
@@ -178,6 +179,7 @@ stasis_operation_impl stasis_op_impl_alloc() {
 stasis_operation_impl stasis_op_impl_dealloc() {
   stasis_operation_impl o = {
     OPERATION_DEALLOC,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_DEALLOC,
     OPERATION_REALLOC,
     op_dealloc
@@ -189,6 +191,7 @@ stasis_operation_impl stasis_op_impl_dealloc() {
 stasis_operation_impl stasis_op_impl_realloc() {
   stasis_operation_impl o = {
     OPERATION_REALLOC,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_REALLOC,
     OPERATION_NOOP,
     op_realloc
diff --git a/src/stasis/operations/arrayList.c b/src/stasis/operations/arrayList.c
index 9394e78..5f0e626 100644
--- a/src/stasis/operations/arrayList.c
+++ b/src/stasis/operations/arrayList.c
@@ -101,6 +101,7 @@ static int array_list_op_init_header(const LogEntry* e, Page* p) {
 stasis_operation_impl stasis_op_impl_array_list_header_init() {
   stasis_operation_impl o = {
     OPERATION_ARRAY_LIST_HEADER_INIT,
+    UNINITIALIZED_PAGE,
     OPERATION_ARRAY_LIST_HEADER_INIT,
     /* Do not need to roll back this page, since it will be deallocated. */
     OPERATION_NOOP,
diff --git a/src/stasis/operations/decrement.c b/src/stasis/operations/decrement.c
index 2c0a0c4..0e53125 100644
--- a/src/stasis/operations/decrement.c
+++ b/src/stasis/operations/decrement.c
@@ -63,6 +63,7 @@ static int op_decrement(const LogEntry* e, Page* p) {
 stasis_operation_impl stasis_op_impl_decrement() {
   stasis_operation_impl o = {
     OPERATION_DECREMENT,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_DECREMENT,
     OPERATION_INCREMENT,
     op_decrement
diff --git a/src/stasis/operations/increment.c b/src/stasis/operations/increment.c
index f0177d5..4d7354d 100644
--- a/src/stasis/operations/increment.c
+++ b/src/stasis/operations/increment.c
@@ -64,6 +64,7 @@ static int op_decrement(const LogEntry* e, Page* p) {
 stasis_operation_impl stasis_op_impl_increment() {
   stasis_operation_impl o = {
     OPERATION_INCREMENT,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_INCREMENT,
     OPERATION_DECREMENT,
     op_decrement
diff --git a/src/stasis/operations/linearHashNTA.c b/src/stasis/operations/linearHashNTA.c
index 1f0d91c..5e9e8f9 100644
--- a/src/stasis/operations/linearHashNTA.c
+++ b/src/stasis/operations/linearHashNTA.c
@@ -163,6 +163,7 @@ compensated_function static int op_linear_hash_remove(const LogEntry* e, Page* p
 stasis_operation_impl stasis_op_impl_linear_hash_insert() {
   stasis_operation_impl o = {
     OPERATION_LINEAR_HASH_INSERT,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_NOOP,
     OPERATION_LINEAR_HASH_REMOVE,
     &op_linear_hash_insert
@@ -172,6 +173,7 @@ stasis_operation_impl stasis_op_impl_linear_hash_insert() {
 stasis_operation_impl stasis_op_impl_linear_hash_remove() {
   stasis_operation_impl o = {
     OPERATION_LINEAR_HASH_REMOVE,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_NOOP,
     OPERATION_LINEAR_HASH_INSERT,
     &op_linear_hash_remove
diff --git a/src/stasis/operations/linkedListNTA.c b/src/stasis/operations/linkedListNTA.c
index 1a8ccf6..df4db13 100644
--- a/src/stasis/operations/linkedListNTA.c
+++ b/src/stasis/operations/linkedListNTA.c
@@ -133,6 +133,7 @@ compensated_function int TlinkedListInsert(int xid, recordid list, const byte *
 stasis_operation_impl stasis_op_impl_linked_list_insert() {
   stasis_operation_impl o = { 
     OPERATION_LINKED_LIST_INSERT,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_NOOP, 
     OPERATION_LINKED_LIST_REMOVE,
     &op_linked_list_nta_insert
@@ -142,6 +143,7 @@ stasis_operation_impl stasis_op_impl_linked_list_insert() {
 stasis_operation_impl stasis_op_impl_linked_list_remove() {
   stasis_operation_impl o = { 
     OPERATION_LINKED_LIST_REMOVE,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_NOOP, 
     OPERATION_LINKED_LIST_INSERT,
     &op_linked_list_nta_remove
diff --git a/src/stasis/operations/lsnFreeSet.c b/src/stasis/operations/lsnFreeSet.c
index b2063c1..16094b1 100644
--- a/src/stasis/operations/lsnFreeSet.c
+++ b/src/stasis/operations/lsnFreeSet.c
@@ -94,6 +94,7 @@ int TsetWriteBack(int xid, pageid_t page, pageoff_t off, pageoff_t len, const vo
 stasis_operation_impl stasis_op_impl_lsn_free_set() {
   stasis_operation_impl o = {
     OPERATION_SET_LSN_FREE,
+    SEGMENT_PAGE,
     OPERATION_SET_LSN_FREE,
     OPERATION_SET_LSN_FREE_INVERSE,
     op_lsn_free_set
@@ -104,6 +105,7 @@ stasis_operation_impl stasis_op_impl_lsn_free_set() {
 stasis_operation_impl stasis_op_impl_lsn_free_set_inverse() {
   stasis_operation_impl o = {
     OPERATION_SET_LSN_FREE_INVERSE,
+    SEGMENT_PAGE,
     OPERATION_SET_LSN_FREE_INVERSE,
     OPERATION_SET_LSN_FREE,
     op_lsn_free_unset
diff --git a/src/stasis/operations/noop.c b/src/stasis/operations/noop.c
index 9aac4a7..d42e14b 100644
--- a/src/stasis/operations/noop.c
+++ b/src/stasis/operations/noop.c
@@ -55,6 +55,7 @@ int noop(const LogEntry* e, Page* p) {
 stasis_operation_impl stasis_op_impl_noop() {
   stasis_operation_impl o = {
     OPERATION_NOOP,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_NOOP,
     OPERATION_NOOP,
     &noop
diff --git a/src/stasis/operations/pageOperations.c b/src/stasis/operations/pageOperations.c
index f2c6e92..ae289ee 100644
--- a/src/stasis/operations/pageOperations.c
+++ b/src/stasis/operations/pageOperations.c
@@ -166,6 +166,7 @@ int TpageGetType(int xid, pageid_t page) {
 stasis_operation_impl stasis_op_impl_page_set_range() {
   stasis_operation_impl o = {
     OPERATION_PAGE_SET_RANGE,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_PAGE_SET_RANGE,
     OPERATION_PAGE_SET_RANGE_INVERSE,
     op_page_set_range
@@ -176,6 +177,7 @@ stasis_operation_impl stasis_op_impl_page_set_range() {
 stasis_operation_impl stasis_op_impl_page_set_range_inverse() {
   stasis_operation_impl o = {
     OPERATION_PAGE_SET_RANGE_INVERSE,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_PAGE_SET_RANGE_INVERSE,
     OPERATION_PAGE_SET_RANGE,
     &op_page_set_range_inverse
@@ -220,6 +222,7 @@ static int op_initialize_page(const LogEntry* e, Page* p) {
 stasis_operation_impl stasis_op_impl_page_initialize() {
   stasis_operation_impl o = {
     OPERATION_INITIALIZE_PAGE,
+    UNINITIALIZED_PAGE,
     OPERATION_INITIALIZE_PAGE,
     OPERATION_NOOP,
     op_initialize_page
diff --git a/src/stasis/operations/prepare.c b/src/stasis/operations/prepare.c
index b02de88..adaea34 100644
--- a/src/stasis/operations/prepare.c
+++ b/src/stasis/operations/prepare.c
@@ -62,6 +62,7 @@ static int op_prepare(const LogEntry * e, Page * p) {
 stasis_operation_impl stasis_op_impl_prepare() {
   stasis_operation_impl o = {
     OPERATION_PREPARE, /* id */
+    UNKNOWN_TYPE_PAGE,
     OPERATION_PREPARE,
     OPERATION_NOOP,
     &op_prepare/* Function */
diff --git a/src/stasis/operations/regions.c b/src/stasis/operations/regions.c
index 497f9d3..0fe9a62 100644
--- a/src/stasis/operations/regions.c
+++ b/src/stasis/operations/regions.c
@@ -483,6 +483,7 @@ pageid_t TregionAlloc(int xid, pageid_t pageCount, int allocationManager) {
 stasis_operation_impl stasis_op_impl_boundary_tag_alloc() {
   stasis_operation_impl o = {
     OPERATION_ALLOC_BOUNDARY_TAG,
+    UNINITIALIZED_PAGE,
     OPERATION_ALLOC_BOUNDARY_TAG,
     OPERATION_NOOP,
     op_alloc_boundary_tag
@@ -493,6 +494,7 @@ stasis_operation_impl stasis_op_impl_boundary_tag_alloc() {
 stasis_operation_impl stasis_op_impl_region_alloc() {
   stasis_operation_impl o = {
     OPERATION_ALLOC_REGION,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_NOOP,
     OPERATION_ALLOC_REGION_INVERSE,
     noop
@@ -502,6 +504,7 @@ stasis_operation_impl stasis_op_impl_region_alloc() {
 stasis_operation_impl stasis_op_impl_region_alloc_inverse() {
   stasis_operation_impl o = {
     OPERATION_ALLOC_REGION_INVERSE,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_ALLOC_REGION_INVERSE,
     OPERATION_INVALID,
     op_dealloc_region
@@ -511,6 +514,7 @@ stasis_operation_impl stasis_op_impl_region_alloc_inverse() {
 stasis_operation_impl stasis_op_impl_region_dealloc() {
   stasis_operation_impl o = {
     OPERATION_DEALLOC_REGION,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_NOOP,
     OPERATION_DEALLOC_REGION_INVERSE,
     noop
@@ -521,6 +525,7 @@ stasis_operation_impl stasis_op_impl_region_dealloc() {
 stasis_operation_impl stasis_op_impl_region_dealloc_inverse() {
   stasis_operation_impl o = {
     OPERATION_DEALLOC_REGION_INVERSE,
+    UNKNOWN_TYPE_PAGE,
     OPERATION_DEALLOC_REGION_INVERSE,
     OPERATION_INVALID,
     op_alloc_region
diff --git a/src/stasis/operations/segmentFile.c b/src/stasis/operations/segmentFile.c
index fa2d03c..91c360d 100644
--- a/src/stasis/operations/segmentFile.c
+++ b/src/stasis/operations/segmentFile.c
@@ -129,6 +129,7 @@ static int op_segment_file_pwrite_inverse(const LogEntry* e, Page* p) {
 stasis_operation_impl stasis_op_impl_segment_file_pwrite() {
   static stasis_operation_impl o = {
     OPERATION_SEGMENT_FILE_PWRITE,
+    SEGMENT_PAGE,
     OPERATION_SEGMENT_FILE_PWRITE,
     OPERATION_SEGMENT_FILE_PWRITE_INVERSE,
     op_segment_file_pwrite
@@ -139,6 +140,7 @@ stasis_operation_impl stasis_op_impl_segment_file_pwrite() {
 stasis_operation_impl stasis_op_impl_segment_file_pwrite_inverse() {
   static stasis_operation_impl o = {
     OPERATION_SEGMENT_FILE_PWRITE_INVERSE,
+    SEGMENT_PAGE,
     OPERATION_SEGMENT_FILE_PWRITE_INVERSE,
     OPERATION_SEGMENT_FILE_PWRITE,
     op_segment_file_pwrite_inverse
diff --git a/src/stasis/operations/set.c b/src/stasis/operations/set.c
index 0a6b133..d891e8a 100644
--- a/src/stasis/operations/set.c
+++ b/src/stasis/operations/set.c
@@ -217,41 +217,45 @@ compensated_function void TsetRange(int xid, recordid rid, int offset, int lengt
 }
 
 stasis_operation_impl stasis_op_impl_set() {
-	stasis_operation_impl o = {
-	  OPERATION_SET,
-	  OPERATION_SET,
-	  OPERATION_SET_INVERSE,
-	  op_set
-	};
-	return o;
+  stasis_operation_impl o = {
+    OPERATION_SET,
+    UNKNOWN_TYPE_PAGE,
+    OPERATION_SET,
+    OPERATION_SET_INVERSE,
+    op_set
+  };
+  return o;
 }
 
 stasis_operation_impl stasis_op_impl_set_inverse() {
-	stasis_operation_impl o = {
-	  OPERATION_SET_INVERSE,
-	  OPERATION_SET_INVERSE,
-	  OPERATION_SET,
-	  op_set_inverse
-	};
-	return o;
+  stasis_operation_impl o = {
+    OPERATION_SET_INVERSE,
+    UNKNOWN_TYPE_PAGE,
+    OPERATION_SET_INVERSE,
+    OPERATION_SET,
+    op_set_inverse
+  };
+  return o;
 }
 
 stasis_operation_impl stasis_op_impl_set_range() {
-	stasis_operation_impl o = {
-		OPERATION_SET_RANGE,
-		OPERATION_SET_RANGE,
-		OPERATION_SET_RANGE_INVERSE,
-		op_set_range
-	};
-	return o;
+  stasis_operation_impl o = {
+    OPERATION_SET_RANGE,
+    UNKNOWN_TYPE_PAGE,
+    OPERATION_SET_RANGE,
+    OPERATION_SET_RANGE_INVERSE,
+    op_set_range
+  };
+  return o;
 }
 
 stasis_operation_impl stasis_op_impl_set_range_inverse() {
-	stasis_operation_impl o = {
-		OPERATION_SET_RANGE_INVERSE,
-		OPERATION_SET_RANGE_INVERSE,
-		OPERATION_SET_RANGE,
-		op_set_range_inverse
-	};
-	return o;
+  stasis_operation_impl o = {
+    OPERATION_SET_RANGE_INVERSE,
+    UNKNOWN_TYPE_PAGE,
+    OPERATION_SET_RANGE_INVERSE,
+    OPERATION_SET_RANGE,
+    op_set_range_inverse
+  };
+  return o;
 }
diff --git a/src/stasis/page/slotted.c b/src/stasis/page/slotted.c
index 1f6a31f..abec433 100644
--- a/src/stasis/page/slotted.c
+++ b/src/stasis/page/slotted.c
@@ -2,7 +2,13 @@
 #include <stasis/page.h>
 #include <stasis/page/slotted.h>
 #include <assert.h>
-/** @todo should page implementations provide readLSN / writeLSN??? */
+
+// plan: slotted fsck on read / write.  Make it more thorough so that the other methods only check for record existence.
+//       intermediate ops assume that slotted.c is correctly implemented (ie: fsck passes iff page is OK, page always "stays" OK)
+//       stop calloing slotted fsck on each operation.  This should speed things up a *lot*.
+// benchmark page ops (real time) + hash table (user time)
+
+
 #include <stasis/truncation.h>
 
 /**
diff --git a/src/stasis/recovery2.c b/src/stasis/recovery2.c
index e08d95d..93b48ea 100644
--- a/src/stasis/recovery2.c
+++ b/src/stasis/recovery2.c
@@ -193,7 +193,7 @@ static void stasis_recovery_redo(stasis_log_t* log) {
         } else if(e->update.page == SEGMENT_PAGEID) {
           stasis_operation_redo(e,0);
         } else {
-          Page * p = loadPage(e->xid, e->update.page);
+          Page * p = loadPageForOperation(e->xid, e->update.page, e->update.funcID);
           writelock(p->rwlatch,0);
           stasis_operation_redo(e,p);
           unlock(p->rwlatch);
@@ -213,7 +213,7 @@ static void stasis_recovery_redo(stasis_log_t* log) {
 	      // need to grab latch page here so that Tabort() can be atomic
 	      // below...
 
-	      Page * p = loadPage(e->xid, ce->update.page);
+	      Page * p = loadPageForOperation(e->xid, ce->update.page, ce->update.funcID);
 	      writelock(p->rwlatch,0);
 	      stasis_operation_undo(ce, e->LSN, p);
 	      unlock(p->rwlatch);
@@ -290,11 +290,8 @@ static void stasis_recovery_undo(stasis_log_t* log, int recovery) {
             // atomically log (getting clr), and apply undo.
             // otherwise, there's a race where the page's LSN is
             // updated before we undo.
-            Page* p = NULL;
-            if(e->update.page != INVALID_PAGE) {
-              p = loadPage(e->xid, e->update.page);
-              writelock(p->rwlatch,0);
-            }
+            Page* p = loadPageForOperation(e->xid, e->update.page, e->update.funcID);
+            if(p) writelock(p->rwlatch,0);
 
             // Log a CLR for this entry
             lsn_t clr_lsn = stasis_log_write_clr(log, e);
diff --git a/src/stasis/transactional2.c b/src/stasis/transactional2.c
index a220ae2..21922c6 100644
--- a/src/stasis/transactional2.c
+++ b/src/stasis/transactional2.c
@@ -159,7 +159,7 @@ compensated_function void Tupdate(int xid, pageid_t page,
   LogEntry * e;
   assert(xid >= 0 && stasis_transaction_table[xid % MAX_TRANSACTIONS].xid == xid);
 
-  Page * p = (page == SEGMENT_PAGEID) ? 0 : loadPage(xid, page);
+  Page * p = loadPageForOperation(xid, page, op);
 
   try {
     if(globalLockManager.writeLockPage && p) {
diff --git a/stasis/bufferManager.h b/stasis/bufferManager.h
index 4c93097..adc9f41 100644
--- a/stasis/bufferManager.h
+++ b/stasis/bufferManager.h
@@ -97,6 +97,8 @@ Page * loadPageOfType(int xid, pageid_t pageid, pagetype_t type);
 
 Page * loadUninitializedPage(int xid, pageid_t pageid);
 
+Page * loadPageForOperation(int xid, pageid_t pageid, int op);
+
 Page * getCachedPage(int xid, const pageid_t pageid);
 
 /**
@@ -110,7 +112,7 @@ extern Page * (*loadUninitPageImpl)(int xid, pageid_t pageid);
 
     @return a pointer to the page, or NULL if the page is not in cache, or is being read from disk.
  */
-extern Page * (*getCachedPageImpl)(int xid, pageid_t pageid);
+extern Page * (*getCachedPageImpl)(int xid, const pageid_t pageid);
 /**
    loadPage aquires a lock when it is called, effectively pinning it
    in memory.  releasePage releases this lock.
diff --git a/stasis/operations.h b/stasis/operations.h
index 3502362..8fd2872 100644
--- a/stasis/operations.h
+++ b/stasis/operations.h
@@ -83,6 +83,13 @@ typedef struct {
    * ID of operation, also index into operations table
    */
   int id;
+  /**
+   * The type of the page this operation modifies.  If UNKNWON_TYPE_PAGE,
+   * then the page's header will be trusted.  If UNINITIALIZED_PAGE, then
+   * the contents of the in-memory version of the page will be undefined
+   * before the operation is applied.  (This is used for allocation).
+   */
+  pagetype_t page_type;
   /**
    * ID of redo operation; logical operations typically
    * set this to OPERATION_NOOP.
@@ -209,6 +216,8 @@ void stasis_operation_undo(const LogEntry * e, lsn_t clr_lsn,
 */
 void stasis_operation_redo(const LogEntry * e, Page * p);
 
+pagetype_t stasis_operation_type(int op);
+
 END_C_DECLS
 
 #endif