From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f50.google.com (mail-pb0-f50.google.com [209.85.160.50]) by kanga.kvack.org (Postfix) with ESMTP id D15756B00F2 for ; Mon, 11 Nov 2013 20:24:17 -0500 (EST) Received: by mail-pb0-f50.google.com with SMTP id xb12so1916426pbc.23 for ; Mon, 11 Nov 2013 17:24:17 -0800 (PST) Received: from psmtp.com ([74.125.245.193]) by mx.google.com with SMTP id mj9si17892309pab.16.2013.11.11.17.24.15 for ; Mon, 11 Nov 2013 17:24:16 -0800 (PST) Message-ID: <5281833C.4010006@codeaurora.org> Date: Mon, 11 Nov 2013 17:24:12 -0800 From: Laura Abbott MIME-Version: 1.0 Subject: Re: [RFC 0/4] Intermix Lowmem and vmalloc References: <1384212412-21236-1-git-send-email-lauraa@codeaurora.org> <20131112001315.GD16735@n2100.arm.linux.org.uk> In-Reply-To: <20131112001315.GD16735@n2100.arm.linux.org.uk> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Russell King - ARM Linux Cc: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org On 11/11/2013 4:13 PM, Russell King - ARM Linux wrote: > On Mon, Nov 11, 2013 at 03:26:48PM -0800, Laura Abbott wrote: >> Hi, >> >> This is an RFC for a feature to allow lowmem and vmalloc virtual address space >> to be intermixed. This has currently only been tested on a narrow set of ARM >> chips. >> >> Currently on 32-bit systems we have >> >> >> Virtual Physical >> >> PAGE_OFFSET +--------------+ PHYS_OFFSET +------------+ >> | | | | >> | | | | >> | | | | >> | lowmem | | direct | >> | | | mapped | >> | | | | >> | | | | >> | | | | >> +--------------+------------------>x------------> >> | | | | >> | | | | >> | | | not-direct| >> | | | mapped | >> | vmalloc | | | >> | | | | >> | | | | >> | | | | >> +--------------+ +------------+ >> >> Where part of the virtual spaced above PHYS_OFFSET is reserved for direct >> mapped lowmem and part of the virtual address space is reserved for vmalloc. > > Minor nit... > > ITYM PAGE_OFFSET here. vmalloc space doesn't exist in physical memory. > Yes, that is a typo. Thanks, Laura -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- 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