From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262081AbVGVNLG (ORCPT ); Fri, 22 Jul 2005 09:11:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262084AbVGVNLG (ORCPT ); Fri, 22 Jul 2005 09:11:06 -0400 Received: from rproxy.gmail.com ([64.233.170.204]:28051 "EHLO rproxy.gmail.com") by vger.kernel.org with ESMTP id S262081AbVGVNLD convert rfc822-to-8bit (ORCPT ); Fri, 22 Jul 2005 09:11:03 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:date:from:to:cc:subject:message-id:in-reply-to:references:x-mailer:mime-version:content-type:content-transfer-encoding; b=PTZovOwIE8ghSnPnFZl57KdLV+KT73wNv83vNNKlfUDD8ImWNggZfF592nAaoRDRzfWe7T6rdt7EkbeLhcUtLp/lyhNY/k+4l3T0yiAGqj1O/eybT+NgFcd5JH6Kmk/t5q3ps+x/7x06a+SEiQwW/15wYpJrg72wUTbV37PtHL8= Date: Fri, 22 Jul 2005 13:31:40 +0200 From: Diego Calleja To: "Ashley" Cc: linux-kernel@vger.kernel.org Subject: Re: Kernel cached memory Message-Id: <20050722133140.22f64a17.diegocg@gmail.com> In-Reply-To: <003401c58ea2$4dfd76f0$5601010a@ashley> References: <003401c58ea2$4dfd76f0$5601010a@ashley> X-Mailer: Sylpheed version 2.0.0beta6 (GTK+ 2.6.8; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org El Fri, 22 Jul 2005 17:46:58 +0800, "Ashley" escribió: > from the output of command "free", I can see that many GB memory was cached > by kernel. Does anyone know how to free the kernel cached > memory? thanks in advance. You don't want that. Kernel will free cached memory when apps need it. When there's a lot of free memory, linux always tries to use it for cache - because caches speed up things, and it's silly to to leave memory free if you can use it for caching.