From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753798AbaIOJQX (ORCPT ); Mon, 15 Sep 2014 05:16:23 -0400 Received: from cnbjrel02.sonyericsson.com ([219.141.167.166]:17870 "EHLO cnbjrel02.sonyericsson.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753638AbaIOJQV convert rfc822-to-8bit (ORCPT ); Mon, 15 Sep 2014 05:16:21 -0400 From: "Wang, Yalin" To: "'Russell King - ARM Linux'" CC: "'Will Deacon'" , "'linux-kernel@vger.kernel.org'" , "'linux-arm-kernel@lists.infradead.org'" , "'linux-mm@kvack.org'" , "linux-arm-msm@vger.kernel.org" Date: Mon, 15 Sep 2014 17:07:53 +0800 Subject: RE: [RFC] arm:extend the reserved mrmory for initrd to be page aligned Thread-Topic: [RFC] arm:extend the reserved mrmory for initrd to be page aligned Thread-Index: Ac/QwaJziKOD1jqYQEKlSOn56VrK4AAAk7gg Message-ID: <35FD53F367049845BC99AC72306C23D103D6DB491604@CNBJMBX05.corpusers.net> References: <35FD53F367049845BC99AC72306C23D103D6DB4915FC@CNBJMBX05.corpusers.net> <20140915084616.GX12361@n2100.arm.linux.org.uk> In-Reply-To: <20140915084616.GX12361@n2100.arm.linux.org.uk> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi I tested it on my phone, >>From log: <4>[ 0.000000] INITRD unalign phys address:0x02000000+0x0022fb0e <4>[ 0.000000] INITRD aligned phys address:0x02000000+0x00230000 <4>[ 0.579474] free_initrd_mem: free pfn:8192---8752 The tail address is not aligned for most initrd image, This page will not be freed and lost . This patch have a limitation that the tail page's not used Part should not be reserved by any other driver, And must be memory . This is true for most bootloaders , And we will print error if it is false . Thanks -----Original Message----- From: Russell King - ARM Linux [mailto:linux@arm.linux.org.uk] Sent: Monday, September 15, 2014 4:46 PM To: Wang, Yalin Cc: 'Will Deacon'; 'linux-kernel@vger.kernel.org'; 'linux-arm-kernel@lists.infradead.org'; 'linux-mm@kvack.org'; linux-arm-msm@vger.kernel.org Subject: Re: [RFC] arm:extend the reserved mrmory for initrd to be page aligned On Mon, Sep 15, 2014 at 01:11:14PM +0800, Wang, Yalin wrote: > this patch extend the start and end address of initrd to be page > aligned, so that we can free all memory including the un-page aligned > head or tail page of initrd, if the start or end address of initrd are > not page aligned, the page can't be freed by free_initrd_mem() function. Have you tested this patch? If so, how thorough was your testing? -- FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up according to speedtest.net.