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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A998C433F5 for ; Tue, 19 Apr 2022 11:13:41 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0EDC38D0062; Tue, 19 Apr 2022 07:13:41 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 09DF98D0047; Tue, 19 Apr 2022 07:13:41 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EA6888D0062; Tue, 19 Apr 2022 07:13:40 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0140.hostedemail.com [216.40.44.140]) by kanga.kvack.org (Postfix) with ESMTP id DB7918D0047 for ; Tue, 19 Apr 2022 07:13:40 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 874AF8249980 for ; Tue, 19 Apr 2022 11:13:40 +0000 (UTC) X-FDA: 79373368200.30.260DBE8 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf27.hostedemail.com (Postfix) with ESMTP id 13CB440014 for ; Tue, 19 Apr 2022 11:13:38 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id BB81B1042; Tue, 19 Apr 2022 04:13:38 -0700 (PDT) Received: from [10.163.40.223] (unknown [10.163.40.223]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B88BE3F73B; Tue, 19 Apr 2022 04:13:22 -0700 (PDT) Message-ID: <672ff459-81bd-38ef-882d-e718992d295c@arm.com> Date: Tue, 19 Apr 2022 16:44:06 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH v2 7/9] mm: Calc the right pfn if page size is not 4K Content-Language: en-US To: Wupeng Ma , akpm@linux-foundation.org, catalin.marinas@arm.com, will@kernel.org, corbet@lwn.net Cc: ardb@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zyccr.com, dvhart@infradead.org, andy@infradead.org, rppt@kernel.org, paulmck@kernel.org, peterz@infradead.org, jroedel@suse.de, songmuchun@bytedance.com, macro@orcam.me.uk, frederic@kernel.org, W_Armin@gmx.de, john.garry@huawei.com, seanjc@google.com, tsbogend@alpha.franken.de, chenhuacai@kernel.org, david@redhat.com, gpiccoli@igalia.com, mark.rutland@arm.com, wangkefeng.wang@huawei.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-efi@vger.kernel.org, linux-ia64@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org References: <20220414101314.1250667-1-mawupeng1@huawei.com> <20220414101314.1250667-8-mawupeng1@huawei.com> From: Anshuman Khandual In-Reply-To: <20220414101314.1250667-8-mawupeng1@huawei.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 13CB440014 X-Stat-Signature: taykgsc6os3jjrh5eh8kq76hn8fyicnq Authentication-Results: imf27.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf27.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com X-HE-Tag: 1650366818-561584 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 4/14/22 15:43, Wupeng Ma wrote: > From: Ma Wupeng > > Previous 0x100000 is used to check the 4G limit in > find_zone_movable_pfns_for_nodes(). This is right in x86 because > the page size can only be 4K. But 16K and 64K are available in > arm64. So replace it with PHYS_PFN(SZ_4G). > > Signed-off-by: Ma Wupeng > --- > mm/page_alloc.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index 6e5b4488a0c5..570d0ebf98df 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -7870,7 +7870,7 @@ static void __init find_zone_movable_pfns_for_nodes(void) > > usable_startpfn = memblock_region_memory_base_pfn(r); > > - if (usable_startpfn < 0x100000) { > + if (usable_startpfn < PHYS_PFN(SZ_4G)) { > mem_below_4gb_not_mirrored = true; > continue; > } Regardless PFN value should never be encoded directly. Reviewed-by: Anshuman Khandual