diff --git a/Makefile b/Makefile
index 069d41a9..d019a429 100644
--- a/Makefile
+++ b/Makefile
@@ -62,8 +62,7 @@ html: content
 	@echo making HTML content
 	$(Q)./scripts/show-versions.py
 	@echo zjy make html
-	$(Q)$(SPHINXBUILD) -t $(DOC_TAG) -b html -d $(BUILDDIR)/doctrees $(SOURCEDIR) $(BUILDDIR)/html $(SPHINXOPTS) $(OPTS)
-	#@echo zjy filter doc in log
+	$(Q)$(SPHINXBUILD) -t $(DOC_TAG) -b html -d $(BUILDDIR)/doctrees $(SOURCEDIR) $(BUILDDIR)/html $(SPHINXOPTS) $(OPTS) > $(BUILDDIR)/doc.log 2>&1
 	$(Q)./scripts/filter-doc-log.sh $(BUILDDIR)/doc.log
 	@echo zjy done
 singlehtml: content 
diff --git a/scripts/filter-known-issues.py b/scripts/filter-known-issues.py
index e72436e6..b8729bd4 100755
--- a/scripts/filter-known-issues.py
+++ b/scripts/filter-known-issues.py
@@ -139,26 +139,27 @@ def filter_log(args):
             continue  # skip empty log files
         try:
             with open(filename, "r+b") as f:
-                # logging.info("%s: filtering", filename)
+                logging.info("%s: filtering", filename)
                 # Yeah, this should be more protected in case of exception
                 # and such, but this is a short running program...
                 mm = mmap.mmap(f.fileno(), 0)
+                print("exclude_regexs", exclude_regexs)
                 for ex, origin, flags in exclude_regexs:
-                    # logging.info("%s: searching from %s: %s",
-                    #             filename, origin, ex.pattern)
+                    logging.info("%s: searching from %s: %s",
+                                filename, origin, ex.pattern)
                     for m in re.finditer(ex.pattern, mm, re.MULTILINE):
-                        # logging.info("%s: %s-%s: match from from %s %s",
-                        #             filename, m.start(), m.end(), origin, flags)
+                        logging.info("%s: %s-%s: match from from %s %s",
+                                    filename, m.start(), m.end(), origin, flags)
                         if 'warning' in flags:
                             exclude_ranges.append((m.start(), m.end(), True))
                         else:
                             exclude_ranges.append((m.start(), m.end(), False))
 
                 exclude_ranges = sorted(exclude_ranges, key=lambda r: r[0])
-                # logging.warning(
-                #     "%s: ranges excluded: %s",
-                #     filename,
-                #     exclude_ranges)
+                logging.warning(
+                    "%s: ranges excluded: %s",
+                    filename,
+                    exclude_ranges)
 
                 # Decide what to do with what has been filtered; warnings
                 # go to stderr and warnings file, errors to stdout, what
@@ -168,14 +169,14 @@ def filter_log(args):
                     mm.seek(offset)
                     if b > offset:
                         # We have something not caught by a filter, an error
-                        # logging.info("%s: error range (%d, %d), from %d %dB",
-                        #             filename, offset, b, offset, b - offset)
+                        logging.info("%s: error range (%d, %d), from %d %dB",
+                                    filename, offset, b, offset, b - offset)
                         print_error(fout, mm.read(b - offset))
                         mm.seek(b)
                     if warning == True:		# A warning, print it
                         mm.seek(b)
-                        # logging.info("%s: warning range (%d, %d), from %d %dB",
-                        #             filename, b, e, offset, e - b)
+                        logging.info("%s: warning range (%d, %d), from %d %dB",
+                                    filename, b, e, offset, e - b)
                         print_error(fout, mm.read(e - b))
                     else:				# Exclude, ignore it
                         d = b - offset
@@ -184,8 +185,8 @@ def filter_log(args):
                     offset = e
                 mm.seek(offset)
                 if len(mm) != offset:
-                    # logging.info("%s: error final range from %d %dB",
-                    #             filename, offset, len(mm))
+                    logging.info("%s: error final range from %d %dB",
+                                filename, offset, len(mm))
                     print_error(fout, mm.read(len(mm) - offset - 1))
                 del mm
                 f.close()