From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yh0-f42.google.com (mail-yh0-f42.google.com [209.85.213.42]) by kanga.kvack.org (Postfix) with ESMTP id E58446B006C for ; Mon, 8 Jun 2015 08:16:29 -0400 (EDT) Received: by yhid80 with SMTP id d80so29385328yhi.1 for ; Mon, 08 Jun 2015 05:16:29 -0700 (PDT) Received: from SMTP.CITRIX.COM (smtp.citrix.com. [66.165.176.89]) by mx.google.com with ESMTPS id l126si624692ywg.176.2015.06.08.05.16.28 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 08 Jun 2015 05:16:28 -0700 (PDT) Message-ID: <5575878E.4040109@citrix.com> Date: Mon, 8 Jun 2015 13:16:14 +0100 From: David Vrabel MIME-Version: 1.0 Subject: Re: [Patch V4 13/16] xen: add explicit memblock_reserve() calls for special pages References: <1433765217-16333-1-git-send-email-jgross@suse.com> <1433765217-16333-14-git-send-email-jgross@suse.com> In-Reply-To: <1433765217-16333-14-git-send-email-jgross@suse.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Juergen Gross , xen-devel@lists.xensource.com, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org On 08/06/15 13:06, Juergen Gross wrote: > Some special pages containing interfaces to xen are being reserved > implicitly only today. The memblock_reserve() call to reserve them is > meant to reserve the p2m list supplied by xen. It is just reserving > not only the p2m list itself, but some more pages up to the start of > the xen built page tables. > > To be able to move the p2m list to another pfn range, which is needed > for support of huge RAM, this memblock_reserve() must be split up to > cover all affected reserved pages explicitly. > > The affected pages are: > - start_info page > - xenstore ring > - console ring > - shared_info page Reviewed-by: David Vrabel David -- 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