Clarify M_MMAP_THRESHOLD

[Andreas Jaeger]

We got a little bit confused on the purpose of M_MMAP_THRESHOLD and I
think it should be explained better in the manual.

Ok to commit the appended patch?
Andreas

2003-02-24  Andreas Jaeger  <aj@suse.de>

	* manual/memory.texi (Malloc Tunable Parameters): Clarify
	behaviour of M_MMAP_THRESHOLD.

============================================================
Index: manual/memory.texi
--- manual/memory.texi	22 Jul 2002 00:57:09 -0000	1.76
+++ manual/memory.texi	25 Feb 2003 05:26:43 -0000
@@ -697,7 +697,8 @@ heap size such that excessive amounts of
 All chunks larger than this value are allocated outside the normal
 heap, using the @code{mmap} system call.  This way it is guaranteed
 that the memory for these chunks can be returned to the system on
-@code{free}.
+@code{free}.  Note that requests smaller than this threshold might still
+bet allocated via @code{mmap}.
 @item M_MMAP_MAX
 The maximum number of chunks to allocate with @code{mmap}.  Setting this
 to zero disables all use of @code{mmap}.

-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.inka.de
    http://www.suse.de/~aj