From owner-svn-src-all@FreeBSD.ORG  Thu Jul  9 16:59:30 2009
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 291B1106564A;
	Thu,  9 Jul 2009 16:59:30 +0000 (UTC)
	(envelope-from joel@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 176288FC14;
	Thu,  9 Jul 2009 16:59:30 +0000 (UTC)
	(envelope-from joel@FreeBSD.org)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id n69GxTHT091364;
	Thu, 9 Jul 2009 16:59:29 GMT (envelope-from joel@svn.freebsd.org)
Received: (from joel@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id n69GxTlO091362;
	Thu, 9 Jul 2009 16:59:29 GMT (envelope-from joel@svn.freebsd.org)
Message-Id: <200907091659.n69GxTlO091362@svn.freebsd.org>
From: Joel Dahl <joel@FreeBSD.org>
Date: Thu, 9 Jul 2009 16:59:29 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r195503 - head/share/man/man4
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 09 Jul 2009 16:59:30 -0000

Author: joel (doc committer)
Date: Thu Jul  9 16:59:29 2009
New Revision: 195503
URL: http://svn.freebsd.org/changeset/base/195503

Log:
  Adjust the description of hw.snd.feeder_rate_polyphase_max and
  hw.snd.compat_linux_mmap a bit.
  
  Submitted by:	ariff
  Approved by:	re (blanket)

Modified:
  head/share/man/man4/pcm.4

Modified: head/share/man/man4/pcm.4
==============================================================================
--- head/share/man/man4/pcm.4	Thu Jul  9 16:40:00 2009	(r195502)
+++ head/share/man/man4/pcm.4	Thu Jul  9 16:59:29 2009	(r195503)
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd July 7, 2009
+.Dd July 9, 2009
 .Dt SOUND 4
 .Os
 .Sh NAME
@@ -210,10 +210,22 @@ are global settings and
 are device specific.
 .Bl -tag -width indent
 .It Va hw.snd.compat_linux_mmap
-Enable to allow PROT_EXEC page mappings.
-All Linux applications using sound and
+Linux
 .Xr mmap 2
-require this.
+compability.
+The following values are supported (default is 0):
+.Bl -tag -width 2n
+.It -1
+Force disabling/denying PROT_EXEC
+.Xr mmap 2
+requests.
+.It 0
+Auto detect proc/ABI type, allow
+.Xr mmap 2
+for Linux applications, and deny for everything else.
+.It 1
+Always allow PROT_EXEC page mappings.
+.El
 .It Va hw.snd.default_auto
 Enable to automatically assign default sound unit to the most recent
 attached device.
@@ -240,6 +252,8 @@ Minimum allowable sample rate.
 .It Va hw.snd.feeder_rate_polyphase_max
 Adjust to set the maximum number of allowed polyphase entries during the
 process of building resampling filters.
+Disabling polyphase resampling has the benefit of reducing memory usage, at
+the expense of slower and lower quality conversion.
 Only applicable when the SINC interpolator is used.
 Default value is 183040.
 Set to 0 to disable polyphase resampling.