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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 181B6C433DF for ; Thu, 2 Jul 2020 14:10:45 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 CCE8A20772 for ; Thu, 2 Jul 2020 14:10:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="jMSFBZ7O" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CCE8A20772 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=XrC/5ltZz3OIUY+Zdou8Ek/sogHM6xHK/UGrRvu+qX4=; b=jMSFBZ7OqImonm0RO82ijxou8 6OjcadP59Hqd7RzYYvLJG1LIbakazypHEQj1Yz4Q5m05MtZgBBPc7n8OsgGE7VgwOR1IWWkzM8VTB QkF+UwPzjxfUTxHBAKfUUcgURgYCvh5J9FGPk8p7rYn4IfdU0xhTJInEXQ4yvmyfJebBae0pe6Ue4 ioW/1w9tT5YkRbD8zJjqAzTSIIbrwZwjdP8D7LTyxX4Zwu1UFCYH3T/LNXSDJ0cQlu0L1Gthm9g79 3a7bYmbHHA/oTlMYvAVlZJPd/O36ukzypd5el9l23NOoVgs4WkQmjlzFIP4IAsZPF3s8EVcRqYGoq vCvuxgIXg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jqztr-0005H1-Dr; Thu, 02 Jul 2020 14:09:15 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jqzto-0005G7-1O for linux-arm-kernel@lists.infradead.org; Thu, 02 Jul 2020 14:09:12 +0000 Received: from gaia (unknown [95.146.230.158]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 571C020780; Thu, 2 Jul 2020 14:09:09 +0000 (UTC) Date: Thu, 2 Jul 2020 15:09:07 +0100 From: Catalin Marinas To: Anshuman Khandual Subject: Re: [PATCH V3 (RESEND) 3/3] arm64/mm: Enable vmem_altmap support for vmemmap mappings Message-ID: <20200702140906.GG22241@gaia> References: <1592442930-9380-1-git-send-email-anshuman.khandual@arm.com> <1592442930-9380-4-git-send-email-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1592442930-9380-4-git-send-email-anshuman.khandual@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200702_100912_142034_7720C62C X-CRM114-Status: GOOD ( 13.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Yu Zhao , David Hildenbrand , Steve Capper , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Hsin-Yi Wang , Thomas Gleixner , Will Deacon , Andrew Morton , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jun 18, 2020 at 06:45:30AM +0530, Anshuman Khandual wrote: > Device memory ranges when getting hot added into ZONE_DEVICE, might require > their vmemmap mapping's backing memory to be allocated from their own range > instead of consuming system memory. This prevents large system memory usage > for potentially large device memory ranges. Device driver communicates this > request via vmem_altmap structure. Architecture needs to take this request > into account while creating and tearing down vemmmap mappings. > > This enables vmem_altmap support in vmemmap_populate() and vmemmap_free() > which includes vmemmap_populate_basepages() used for ARM64_16K_PAGES and > ARM64_64K_PAGES configs. > > Cc: Catalin Marinas > Cc: Will Deacon > Cc: Mark Rutland > Cc: Steve Capper > Cc: David Hildenbrand > Cc: Yu Zhao > Cc: Hsin-Yi Wang > Cc: Thomas Gleixner > Cc: Andrew Morton > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > Tested-by: Jia He > Signed-off-by: Anshuman Khandual This looks fine to me: Reviewed-by: Catalin Marinas I presume this series would go into mainline via the mm tree as it touches several architectures. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel