From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Fri, 15 Aug 2008 18:16:57 +0100 (BST) Received: from sj-iport-5.cisco.com ([171.68.10.87]:64695 "EHLO sj-iport-5.cisco.com") by ftp.linux-mips.org with ESMTP id S28576021AbYHORQw (ORCPT ); Fri, 15 Aug 2008 18:16:52 +0100 X-IronPort-AV: E=Sophos;i="4.32,216,1217808000"; d="scan'208";a="41702202" Received: from sj-dkim-2.cisco.com ([171.71.179.186]) by sj-iport-5.cisco.com with ESMTP; 15 Aug 2008 17:16:44 +0000 Received: from sj-core-2.cisco.com (sj-core-2.cisco.com [171.71.177.254]) by sj-dkim-2.cisco.com (8.12.11/8.12.11) with ESMTP id m7FHGivS031533; Fri, 15 Aug 2008 10:16:44 -0700 Received: from cliff.cisco.com (cliff.cisco.com [171.69.11.141]) by sj-core-2.cisco.com (8.13.8/8.13.8) with ESMTP id m7FHGiHO026063; Fri, 15 Aug 2008 17:16:44 GMT Received: from CUPLXSUNDISM01.corp.sa.net ([64.101.21.60]) by cliff.cisco.com (8.6.12/8.6.5) with ESMTP id RAA07620; Fri, 15 Aug 2008 17:16:33 GMT Message-ID: <48A5B9F1.3080201@sciatl.com> Date: Fri, 15 Aug 2008 10:16:33 -0700 From: C Michael Sundius User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Thomas Bogendoerfer CC: Dave Hansen , linux-mm@kvack.org, linux-mips@linux-mips.org, jfraser@broadcom.com, Andy Whitcroft Subject: Re: sparsemem support for mips with highmem References: <48A4AC39.7020707@sciatl.com> <1218753308.23641.56.camel@nimitz> <48A4C542.5000308@sciatl.com> <20080815080331.GA6689@alpha.franken.de> <1218815299.23641.80.camel@nimitz> <48A5AADE.1050808@sciatl.com> <20080815163302.GA9846@alpha.franken.de> In-Reply-To: <20080815163302.GA9846@alpha.franken.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Authentication-Results: sj-dkim-2; header.From=Michael.sundius@sciatl.com; dkim=neutral Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 20230 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: Michael.sundius@sciatl.com Precedence: bulk X-list: linux-mips Thomas Bogendoerfer wrote: > On Fri, Aug 15, 2008 at 09:12:14AM -0700, C Michael Sundius wrote: > >> yes, actually the top two bits are used in MIPS as segment bits. >> > > you are confusing virtual addresses with physcial addresses. There > are even 32bit CPU, which could address more than 4GB physical > addresses via TLB entries. > > Thomas. > > Ah, your right. thanks. "but it's not necessar*il*y a good idea". That is to say, we don't put memory above 2 GiB. No need to make the mem_section[] array bigger than need be. This gives further credence for it to be a configurable in Kconfig as well. Mike From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <48A5B9F1.3080201@sciatl.com> Date: Fri, 15 Aug 2008 10:16:33 -0700 From: C Michael Sundius MIME-Version: 1.0 Subject: Re: sparsemem support for mips with highmem References: <48A4AC39.7020707@sciatl.com> <1218753308.23641.56.camel@nimitz> <48A4C542.5000308@sciatl.com> <20080815080331.GA6689@alpha.franken.de> <1218815299.23641.80.camel@nimitz> <48A5AADE.1050808@sciatl.com> <20080815163302.GA9846@alpha.franken.de> In-Reply-To: <20080815163302.GA9846@alpha.franken.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Thomas Bogendoerfer Cc: Dave Hansen , linux-mm@kvack.org, linux-mips@linux-mips.org, jfraser@broadcom.com, Andy Whitcroft List-ID: Thomas Bogendoerfer wrote: > On Fri, Aug 15, 2008 at 09:12:14AM -0700, C Michael Sundius wrote: > >> yes, actually the top two bits are used in MIPS as segment bits. >> > > you are confusing virtual addresses with physcial addresses. There > are even 32bit CPU, which could address more than 4GB physical > addresses via TLB entries. > > Thomas. > > Ah, your right. thanks. "but it's not necessar*il*y a good idea". That is to say, we don't put memory above 2 GiB. No need to make the mem_section[] array bigger than need be. This gives further credence for it to be a configurable in Kconfig as well. Mike -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org