Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752613AbbFHMQg (ORCPT ); Mon, 8 Jun 2015 08:16:36 -0400 Received: from smtp.citrix.com ([66.165.176.89]:20585 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751532AbbFHMQ3 (ORCPT ); Mon, 8 Jun 2015 08:16:29 -0400 X-IronPort-AV: E=Sophos;i="5.13,573,1427760000"; d="scan'208";a="269841813" Message-ID: <5575878E.4040109@citrix.com> Date: Mon, 8 Jun 2015 13:16:14 +0100 From: David Vrabel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.4.0 MIME-Version: 1.0 To: Juergen Gross , , , , , 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 X-DLP: MIA2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 955 Lines: 25 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/