From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0B6AC282C0 for ; Fri, 25 Jan 2019 16:30:14 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 334A2218B0 for ; Fri, 25 Jan 2019 16:30:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 334A2218B0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 43mPdJ1KDJzDqQk for ; Sat, 26 Jan 2019 03:30:12 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=arm.com (client-ip=217.140.101.70; helo=foss.arm.com; envelope-from=catalin.marinas@arm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=arm.com Received: from foss.arm.com (usa-sjc-mx-foss1.foss.arm.com [217.140.101.70]) by lists.ozlabs.org (Postfix) with ESMTP id 43mPbW5XctzDqFB for ; Sat, 26 Jan 2019 03:28:39 +1100 (AEDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id EEF68A78; Fri, 25 Jan 2019 08:28:37 -0800 (PST) Received: from arrakis.emea.arm.com (arrakis.cambridge.arm.com [10.1.196.113]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D23C93F5AF; Fri, 25 Jan 2019 08:28:33 -0800 (PST) Date: Fri, 25 Jan 2019 16:28:31 +0000 From: Catalin Marinas To: David Hildenbrand Subject: Re: [PATCH v2 7/9] arm64: kdump: No need to mark crashkernel pages manually PG_reserved Message-ID: <20190125162830.GK25901@arrakis.emea.arm.com> References: <20190114125903.24845-1-david@redhat.com> <20190114125903.24845-8-david@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190114125903.24845-8-david@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Michal Hocko , CHANDAN VN , Bhupesh Sharma , Will Deacon , Stefan Agner , linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, Florian Fainelli , AKASHI Takahiro , Laura Abbott , Kristina Martsenko , linux-m68k@lists.linux-m68k.org, Mike Rapoport , linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Logan Gunthorpe , linux-kernel@vger.kernel.org, Dave Kleikamp , James Morse , Johannes Weiner , Andrew Morton , linuxppc-dev@lists.ozlabs.org, Greg Hackmann Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Mon, Jan 14, 2019 at 01:59:01PM +0100, David Hildenbrand wrote: > The crashkernel is reserved via memblock_reserve(). memblock_free_all() > will call free_low_memory_core_early(), which will go over all reserved > memblocks, marking the pages as PG_reserved. > > So manually marking pages as PG_reserved is not necessary, they are > already in the desired state (otherwise they would have been handed over > to the buddy as free pages and bad things would happen). > > Cc: Catalin Marinas > Cc: Will Deacon > Cc: James Morse > Cc: Bhupesh Sharma > Cc: David Hildenbrand > Cc: Mark Rutland > Cc: Dave Kleikamp > Cc: Andrew Morton > Cc: Mike Rapoport > Cc: Michal Hocko > Cc: Florian Fainelli > Cc: Stefan Agner > Cc: Laura Abbott > Cc: Greg Hackmann > Cc: Johannes Weiner > Cc: Kristina Martsenko > Cc: CHANDAN VN > Cc: AKASHI Takahiro > Cc: Logan Gunthorpe > Reviewed-by: Matthias Brugger > Signed-off-by: David Hildenbrand Acked-by: Catalin Marinas