.

wcfs/client/wcfs.cpp

@@ -182,6 +182,17 @@ using std::min;
 using std::max;
 using std::vector;
 
+
+#define TRACE 1
+#if TRACE
+#  define trace(format, ...) log::Debugf(format, ##__VA_ARGS__)
+#else
+#  define trace(format, ...) do {} while (0)
+#endif
+
+// trace with op prefix taken from E.
+#define etrace(format, ...) trace("%s", v(E(fmt::errorf(format, ##__VA_ARGS__))))
+
 // wcfs::
 namespace wcfs {
 
@@ -446,7 +457,7 @@ error _Conn::__pin1(PinReq *req) {
         if (!(mmap->blk_start <= req->blk && req->blk < mmap->blk_stop()))
             continue;   // blk ∉ mmap
 
-        //trace("\tremmapblk %d @%s" % (req->blk, (v(req.at) if req.at else "head")))
+        trace("\tremmapblk %d %s", req->blk, (req->at == TidHead ? v(req->at) : "@head"));
 
         // pin only if virtmem did not dirtied page corresponding to this block already
         // if virtmem dirtied the page - it will ask us to remmap it again after commit or abort.
@@ -476,7 +487,7 @@ error _Conn::__pin1(PinReq *req) {
         if (err != nil)
             return err;
 
-        //trace("\t-> remmaped");
+        trace("\t-> remmaped");
     }
 
     // update f._pinned
@@ -502,6 +513,8 @@ error _Conn::resync(zodb::Tid at) {
     xerr::Contextf E("%s: resync -> @%s", v(wconn), v(at));
     wconn._atMu.RUnlock();
 
+    etrace("...");
+
     // XXX downErr -> E
     // XXX at ^ (increases)