From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261836AbVGVAUc (ORCPT ); Thu, 21 Jul 2005 20:20:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261929AbVGVAUc (ORCPT ); Thu, 21 Jul 2005 20:20:32 -0400 Received: from shawidc-mo1.cg.shawcable.net ([24.71.223.10]:34986 "EHLO pd2mo2so.prod.shaw.ca") by vger.kernel.org with ESMTP id S261836AbVGVAUa (ORCPT ); Thu, 21 Jul 2005 20:20:30 -0400 Date: Thu, 21 Jul 2005 18:15:05 -0600 From: Robert Hancock Subject: Re: kernel page size explanation In-reply-to: <4sSO3-58H-13@gated-at.bofh.it> To: linux-kernel Message-id: <42E03A89.1040603@shaw.ca> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7bit X-Accept-Language: en-us, en References: <4sSO3-58H-13@gated-at.bofh.it> User-Agent: Mozilla Thunderbird 1.0.6 (Windows/20050716) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Gaspar Bakos wrote: > Hi, > > Sorry for this nursery-school question. > > Could someone briefly explain me : > 1. what is the kernel page size (any _useful_ pointer on the web is fine), > 2. how can one tune it (for 2.6.*)? > 3. what kind of effect does it have on system performance, if it is > tuneable, and if it worth changing this at all? This is dependent on the hardware, not really the OS. On x86 the normally used page size is 4KB. 4MB pages are also supported but are usually used only for special purposes (ex: hugetlbfs). As you mentioned some other architectures like Itanium support different page sizes. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/