2 files changed, 13 insertions, 1 deletions

diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index 77d18a5d0c..cfac91bae5 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -1934,7 +1934,8 @@ class Parser(multiprocessing.Process):
                 except IndexError:
                     break
                 result = self.parse(*job)
-
+                # Clear the siggen cache after parsing to control memory usage, its huge
+                bb.parse.siggen.postparsing_clean_cache()
             try:
                 self.results.put(result, timeout=0.25)
             except queue.Full:
diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index 3e2a85fc8c..9c299d45e3 100644
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -48,6 +48,9 @@ class SignatureGenerator(object):
     def get_unihash(self, task):
         return self.taskhash[task]
 
+    def postparsing_clean_cache(self):
+        return
+
     def get_taskhash(self, fn, task, deps, dataCache):
         return "0"
 
@@ -152,6 +155,14 @@ class SignatureGeneratorBasic(SignatureGenerator):
         for task in taskdeps:
             d.setVar("BB_BASEHASH_task-%s" % task, self.basehash[fn + "." + task])
 
+    def postparsing_clean_cache(self):
+        #
+        # After parsing we can remove some things from memory to reduce our memory footprint
+        #
+        self.gendeps = {}
+        self.lookupcache = {}
+        self.taskdeps = {}
+
     def rundep_check(self, fn, recipename, task, dep, depname, dataCache):
         # Return True if we should keep the dependency, False to drop it
         # We only manipulate the dependencies for packages not in the whitelist