From owner-freebsd-i386@FreeBSD.ORG  Wed Aug 19 21:37:38 2009
Return-Path: <owner-freebsd-i386@FreeBSD.ORG>
Delivered-To: freebsd-i386@hub.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id C777B106568F;
	Wed, 19 Aug 2009 21:37:38 +0000 (UTC)
	(envelope-from remko@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id BAC5B8FC45;
	Wed, 19 Aug 2009 21:37:38 +0000 (UTC)
Received: from freefall.freebsd.org (remko@localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id n7JLbc1R081137;
	Wed, 19 Aug 2009 21:37:38 GMT
	(envelope-from remko@freefall.freebsd.org)
Received: (from remko@localhost)
	by freefall.freebsd.org (8.14.3/8.14.3/Submit) id n7JLbcSb081133;
	Wed, 19 Aug 2009 21:37:38 GMT (envelope-from remko)
Date: Wed, 19 Aug 2009 21:37:38 GMT
Message-Id: <200908192137.n7JLbcSb081133@freefall.freebsd.org>
To: piroman@myconfig.ru, remko@FreeBSD.org, freebsd-i386@FreeBSD.org
From: remko@FreeBSD.org
Cc: 
Subject: Re: i386/137975: Not clearing of memory after file deletion from a
	ram-disk
X-BeenThere: freebsd-i386@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: I386-specific issues for FreeBSD <freebsd-i386.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-i386>,
	<mailto:freebsd-i386-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-i386>
List-Post: <mailto:freebsd-i386@freebsd.org>
List-Help: <mailto:freebsd-i386-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-i386>,
	<mailto:freebsd-i386-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 19 Aug 2009 21:37:38 -0000

Synopsis: Not clearing of memory after file deletion from a ram-disk

State-Changed-From-To: open->closed
State-Changed-By: remko
State-Changed-When: Wed Aug 19 21:37:38 UTC 2009
State-Changed-Why: 
I think this is not a problem but misunderstanding about how FreeBSD's
memory allocation works. As you see memory is being taken and 'released'
after use, though not entirely; why? FreeBSD also uses the memory as
caching mechanism. For example if you issue an ``ls`` and then do the
``ls`` again, you will see that the second time it will return much
quicker; this is temporarily cached in memory to help you do repeated
tasks quicker. If needed the memory is freed and used for 'more
important' operations. On my systems I normally have 'limited' free
memory available; I do not worry about this because I understand that
it's the caching that 'takes' the memory and releases it when needed.
Please ask around on the questions mailinglist if this was insufficient
explanation.

http://www.freebsd.org/cgi/query-pr.cgi?pr=137975