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 74E20C6FA83 for ; Mon, 5 Sep 2022 17:42:12 +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=cVPr4/prBBVMRhu+sohOBU1IfOij8Wi93cKZLKzZLQk=; b=PukBbKh+jCd4tA ib+933wJLgDXGT3jAWfx8JwCCZbBE5wam2dX3icJKQJhQB37PNrLrFk3OM+FRdarDjuRu42rz3fXf wkzl8yilq3OiN2FF5/PpWez5SZVL4pLmpMMs0UMRRnFqe3vlOhT5obXl3UdAoRKTfS7HwoMBWXbMe ie6rAZaih+uNgp5zKxK+JKlPtmg9VHtTx5ecnjEuRsX39ySH6SHP9LtI6kiUz8luiWiVicRyoYphr G3I2G8MOsdlDmkBAHU6NEcV8SMXOaoRTfgMIptZcEXo4aG/tBQqIkwFDcgKltzG59fbFVvdLNN0Pr Eb9/6GAOjjV8sT2Z3IJw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oVG61-007jMB-HY; Mon, 05 Sep 2022 17:41:18 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oV9Lz-000Gso-Rp; Mon, 05 Sep 2022 10:29:23 +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 ams.source.kernel.org (Postfix) with ESMTPS id 200CDB81085; Mon, 5 Sep 2022 10:29:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 22AD6C433D6; Mon, 5 Sep 2022 10:29:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1662373756; bh=WlJQ2stKL5wf+I/xSf6BcWn5KmuI9TkM3tH0O9cnh3w=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ZpIQhpmFit4FkPay59RFIocVuFZ4MW1FVM5Vjy4riQQTd1torqq3lf1ps2t2H15zy 12P12r1QtqRDQGSojls6fVzEhQdjVb1JGl8b3ERFSl4FJR+54jo2gu2cqrcd5Du1rH 2ZAr6fq3Nmw9mC706pAvdJoljWjvo+16vEw6PvewRgARpH6SNS0U/h36iNbL2K1svJ Qyq3ugBNsht1uf8/AIbjEzg8ay3S+T8ilc+8pbeA0Fil04a2+0vJJOt5uwOvRW6tng WDBmBUq0f4RIeTmd5B62vjMvS7i/LpvyrYp4LBOi4rAfI46jRGKsxgKp6V02xcDrl5 9j/soiF9+NlAg== Date: Mon, 5 Sep 2022 13:28:58 +0300 From: Mike Rapoport To: Baoquan He Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com, ardb@kernel.org, guanghuifeng@linux.alibaba.com, mark.rutland@arm.com, will@kernel.org, linux-mm@kvack.org, thunder.leizhen@huawei.com, wangkefeng.wang@huawei.com, kexec@lists.infradead.org Subject: Re: [PATCH 1/2] arm64, kdump: enforce to take 4G as the crashkernel low memory end Message-ID: References: <20220828005545.94389-1-bhe@redhat.com> <20220828005545.94389-2-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-20220905_032920_675194_617F6517 X-CRM114-Status: GOOD ( 14.24 ) 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, Sep 01, 2022 at 08:25:54PM +0800, Baoquan He wrote: > On 09/01/22 at 10:24am, Mike Rapoport wrote: > > max_zone_phys() only handles cases when CONFIG_ZONE_DMA/DMA32 enabled, > the disabledCONFIG_ZONE_DMA/DMA32 case is not included. I can change > it like: > > static phys_addr_t __init crash_addr_low_max(void) > { > phys_addr_t low_mem_mask = U32_MAX; > phys_addr_t phys_start = memblock_start_of_DRAM(); > > if ((!IS_ENABLED(CONFIG_ZONE_DMA) && !IS_ENABLED(CONFIG_ZONE_DMA32)) || > (phys_start > U32_MAX)) > low_mem_mask = PHYS_ADDR_MAX; > > return low_mem_mast + 1; > } > > or add the disabled CONFIG_ZONE_DMA/DMA32 case into crash_addr_low_max() > as you suggested. Which one do you like better? > > static phys_addr_t __init crash_addr_low_max(void) > { > if (!IS_ENABLED(CONFIG_ZONE_DMA) && !IS_ENABLED(CONFIG_ZONE_DMA32)) > return PHYS_ADDR_MAX + 1; > > return max_zone_phys(32); > } I like the second variant better. -- Sincerely yours, Mike. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel