From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Sat, 19 Dec 2009 23:02:32 +0100 (CET) Received: from h5.dl5rb.org.uk ([81.2.74.5]:55471 "EHLO h5.dl5rb.org.uk" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S1493603AbZLSWC3 (ORCPT ); Sat, 19 Dec 2009 23:02:29 +0100 Received: from h5.dl5rb.org.uk (localhost.localdomain [127.0.0.1]) by h5.dl5rb.org.uk (8.14.3/8.14.3) with ESMTP id nBJM2LSQ023445; Sat, 19 Dec 2009 22:02:21 GMT Received: (from ralf@localhost) by h5.dl5rb.org.uk (8.14.3/8.14.3/Submit) id nBJM2KP2023443; Sat, 19 Dec 2009 22:02:20 GMT Date: Sat, 19 Dec 2009 22:02:19 +0000 From: Ralf Baechle To: David Daney Cc: linux-mips@linux-mips.org Subject: Re: [PATCH] MIPS: Two-level pagetables for 64-bit kernels with 64KB pages. Message-ID: <20091219220219.GB19780@linux-mips.org> References: <1259963556-6876-1-git-send-email-ddaney@caviumnetworks.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1259963556-6876-1-git-send-email-ddaney@caviumnetworks.com> User-Agent: Mutt/1.5.20 (2009-08-17) 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: 25423 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: ralf@linux-mips.org Precedence: bulk X-list: linux-mips On Fri, Dec 04, 2009 at 01:52:36PM -0800, David Daney wrote: > For 64-bit kernels with 64KB pages and two level page tables, there > are 42 bits worth of virtual address space This is larger than the 40 > bits of virtual address space obtained with the default 4KB Page size > and three levels, so there are no draw backs for using two level > tables with this configuration. Queued for 2.6.34, Ralf