1 files changed, 6 insertions, 0 deletions
diff --git a/Src/exec.c b/Src/exec.c
index 9695011e3..3c13da476 100644
--- a/Src/exec.c
+++ b/Src/exec.c
@@ -239,6 +239,12 @@ zfork(struct timeval *tv)
     }
     if (tv)
 	gettimeofday(tv, &dummy_tz);
+    /*
+     * Queueing signals is necessary on Linux because fork()
+     * manipulates mutexes, leading to deadlock in memory
+     * allocation.  We don't expect fork() to be particularly
+     * zippy anyway.
+     */
     queue_signals();
     pid = fork();
     unqueue_signals();