From 187b2ab71446eef91b1b5552f6202f3ee8ed2137 Mon Sep 17 00:00:00 2001
From: Simon Marlow <marlowsd@gmail.com>
Date: Thu, 27 May 2010 21:46:27 +0000
Subject: [PATCH] --install-signal-handles=no does not affect the timer signal
 (#1908)

---
 docs/users_guide/runtime_control.xml |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/docs/users_guide/runtime_control.xml b/docs/users_guide/runtime_control.xml
index 14732c5..d35027b 100644
--- a/docs/users_guide/runtime_control.xml
+++ b/docs/users_guide/runtime_control.xml
@@ -130,6 +130,15 @@
          things like ctrl-C. This option is primarily useful for when
          you are using the Haskell code as a DLL, and want to set your
          own signal handlers.</para>
+
+         <para>Note that even
+           with <option>--install-signal-handlers=no</option>, the RTS
+           interval timer signal is still enabled.  The timer signal
+           is either SIGVTALRM or SIGALRM, depending on the RTS
+           configuration and OS capabilities.  To disable the timer
+           signal, use the <literal>-V0</literal> RTS option (see
+           above).
+         </para>
        </listitem>
      </varlistentry>
 
-- 
1.7.10.4