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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CB172C77B61 for ; Thu, 13 Apr 2023 14:31:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc: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=0X72R7UWE2gKd/RVjYtUiItFTeQIXr97IyH0fzAdkCc=; b=i4/r9oRfEkPP7G JcMFe8qZCaOvixEUulBWwxc/7PL54birPjPZxdPKUyGYoLU7no40BLBkIy6LXD2vlXKcUCry4mSy4 4tmGMfqhp3cPMhQQc5EtBRsQwjlyJuKs7x6OYx5NST7gOz/ZtdDGYRhNhfSpiN+8gKuakGjkYUyc3 r4S5eXLtjqOzW33TZgPe9jnVh/QJqcJhnWZ2hjviCvGaH7hlPm04LlATeG/rFZoGiDUb6DD3Z7rAa MGC3TTH2+0l/wCbaM8VvLEVkQ00MM/8BUuYNcYDVbnv6RiFA7PXUlOkbe6RrVTgGIs8P9PwHqfQyj Trle6Kug4Dr+ZMH/NkFg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pmxyF-006P0A-10; Thu, 13 Apr 2023 14:30:43 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pmxyB-006Ozf-16; Thu, 13 Apr 2023 14:30:40 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id CD3D563F06; Thu, 13 Apr 2023 14:30:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BB1B0C433D2; Thu, 13 Apr 2023 14:30:36 +0000 (UTC) Date: Thu, 13 Apr 2023 15:30:33 +0100 From: Catalin Marinas To: Baoquan He Cc: linux-kernel@vger.kernel.org, horms@kernel.org, thunder.leizhen@huawei.com, John.p.donnelly@oracle.com, will@kernel.org, kexec@lists.infradead.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v5] arm64: kdump: simplify the reservation behaviour of crashkernel=,high Message-ID: References: <20230407022419.19412-1-bhe@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230413_073039_440240_A8B05B55 X-CRM114-Status: GOOD ( 11.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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, Apr 13, 2023 at 03:45:50PM +0800, Baoquan He wrote: > I am OK with this version, or the version with min(SZ_4G, > arm64_dma_phys_limit), or v4. Please help point out if I got your idea > correctly. Thanks a lot. I think we should stick to this patch. The disabling of the ZONE_DMA(32) is fairly specialised and you are right that we should not introduce an artificial 4GB crashkernel boundary on such systems. The slight confusion may be that ,high triggers a search above 4GB where there's not such boundary but this would match the documentation anyway. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel