From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.43) id 1EAXcP-00012Q-Li for garchives@archives.gentoo.org; Wed, 31 Aug 2005 18:47:30 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.4/8.13.4) with SMTP id j7VIhpdD008764; Wed, 31 Aug 2005 18:43:51 GMT Received: from mail.pnpitalia.it (85-18-21-122.ip.fastwebnet.it [85.18.21.122]) by robin.gentoo.org (8.13.4/8.13.4) with ESMTP id j7VIdavR014803 for ; Wed, 31 Aug 2005 18:39:36 GMT Received: from localhost (localhost [127.0.0.1]) by mail.pnpitalia.it (Postfix) with ESMTP id 373217AD6F8 for ; Wed, 31 Aug 2005 20:41:55 +0200 (CEST) Received: from mail.pnpitalia.it ([127.0.0.1]) by localhost (db [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 11503-19 for ; Wed, 31 Aug 2005 20:41:54 +0200 (CEST) Received: from [192.168.4.153] (host-4-153.pnpitalia.it [192.168.4.153]) by mail.pnpitalia.it (Postfix) with ESMTP id AC0D47AD6F6 for ; Wed, 31 Aug 2005 20:41:54 +0200 (CEST) Message-ID: <4315F7CE.9030100@pnpitalia.it> Date: Wed, 31 Aug 2005 20:32:46 +0200 From: Bastian Balthazar Bux User-Agent: Mozilla Thunderbird 1.0.6 (Windows/20050716) X-Accept-Language: en-us, en Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] What is HIGHPTE option in kernel? References: <1125501827.20225.15.camel@neuromancer.home.net> In-Reply-To: <1125501827.20225.15.camel@neuromancer.home.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Virus-Scanned: amavisd-new at db X-Archives-Salt: 8471266f-396f-4333-84a2-014db2a04598 X-Archives-Hash: ccfaaf903959325560c2f6cc8e165e7e Ow Mun Heng wrote: > [quote] > Allocate 3rd-level pagetables from highmem (HIGHPTE) > > The VM uses one page table entry for each page of physical memory. > For systems with a lot of RAM, this can be wasteful of precious > low memory. Setting this option will put user-space page table > entries in high memory. > [/quote] > > I have 1.5Gb of RAM, will this be useful for me? > Not sure but: 3rd-level pagetables are for systems with a *lot* of memory that don't want to waste space in the lowest gig of mem (to keep addresses of high mem.). So basically no advantage with 1.5 gig Cheers -- gentoo-user@gentoo.org mailing list