Log message for revision 113142:
  Note the SIGUSR1 addition that happened a while back
  

Changed:
  U   Zope/trunk/doc/SIGNALS.rst

-=-
Modified: Zope/trunk/doc/SIGNALS.rst
===================================================================
--- Zope/trunk/doc/SIGNALS.rst  2010-06-05 14:11:29 UTC (rev 113141)
+++ Zope/trunk/doc/SIGNALS.rst  2010-06-05 14:15:46 UTC (rev 113142)
@@ -19,6 +19,9 @@
 
     SIGINT  - same as SIGTERM
 
+    SIGUSR1 - dump a stack trace of all threads to stdout. This can help
+              diagnosing `stuck` Zope processes if all threads are stuck.
+
     SIGUSR2 - close and re-open all Zope log files (z2.log, event log,
               detailed log.) A common idiom after rotating Zope log files
               is:

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