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=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 A6010C433ED for ; Mon, 26 Apr 2021 11:29:21 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D0E67611ED for ; Mon, 26 Apr 2021 11:29:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D0E67611ED Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 31ED76B006C; Mon, 26 Apr 2021 07:29:20 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2F6A06B006E; Mon, 26 Apr 2021 07:29:20 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 170666B0070; Mon, 26 Apr 2021 07:29:20 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0193.hostedemail.com [216.40.44.193]) by kanga.kvack.org (Postfix) with ESMTP id EFB506B006C for ; Mon, 26 Apr 2021 07:29:19 -0400 (EDT) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id A2519180ACF76 for ; Mon, 26 Apr 2021 11:29:19 +0000 (UTC) X-FDA: 78074297238.25.C9F2319 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by imf21.hostedemail.com (Postfix) with ESMTP id B9BFFE00011F for ; Mon, 26 Apr 2021 11:29:15 +0000 (UTC) Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 13QBPA6t132771; Mon, 26 Apr 2021 07:29:18 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=pp1; bh=/qHO8gYWVWiijTjYukocta+N/QRWzwXBMwKqV8e4rSs=; b=RypTNGqTF2vB7dWQRxNArlcT5XzLc1tOO94tpVwUKp10pLjHkLuROcvIuQEgpbVmTJom WgUVjEREb3Lko9pBpUYF7ZZWHZedfM9m0T/NrCkMSXJ+eSV64smrGNZPNch9vWsJQok0 FRLPgY13X7pqEPhfMIaYCXNB81+sWdgdioqSuQxeccbVo3hprmJuISdNKEDkbX/79O/J qjunH7ATqAjOk3Wx5jO5s20Z287Br/jUqvasCSph2FKmmXcogpfXIjAKyV5r/ntBieNW GbSPbG1HJl8fGa3pBF1dOZPS7XY06TM/Gd/3b9sGaW/FUQOVgX2QUV43snMGOIUHxfRm vA== Received: from ppma06fra.de.ibm.com (48.49.7a9f.ip4.static.sl-reverse.com [159.122.73.72]) by mx0b-001b2d01.pphosted.com with ESMTP id 385stkw5e8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 26 Apr 2021 07:29:18 -0400 Received: from pps.filterd (ppma06fra.de.ibm.com [127.0.0.1]) by ppma06fra.de.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 13QBRN1U014586; Mon, 26 Apr 2021 11:29:16 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma06fra.de.ibm.com with ESMTP id 384akh8e3j-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 26 Apr 2021 11:29:16 +0000 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 13QBTCRM30867860 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 26 Apr 2021 11:29:13 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D43754204B; Mon, 26 Apr 2021 11:29:12 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2A50D42049; Mon, 26 Apr 2021 11:29:12 +0000 (GMT) Received: from linux.ibm.com (unknown [9.145.40.129]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Mon, 26 Apr 2021 11:29:12 +0000 (GMT) Date: Mon, 26 Apr 2021 14:29:09 +0300 From: Mike Rapoport To: Vladimir Isaev Cc: linux-snps-arc@lists.infradead.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] ARC: Use max_high_pfn as a HIGHMEM zone border Message-ID: References: <20210426101004.42695-1-isaev@synopsys.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210426101004.42695-1-isaev@synopsys.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: VjGorx5mtmwpxzP8K8upRwr2Xg7V1Bu0 X-Proofpoint-GUID: VjGorx5mtmwpxzP8K8upRwr2Xg7V1Bu0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-04-26_03:2021-04-26,2021-04-26 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 malwarescore=0 clxscore=1011 bulkscore=0 priorityscore=1501 mlxlogscore=999 lowpriorityscore=0 adultscore=0 impostorscore=0 spamscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104060000 definitions=main-2104260082 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: B9BFFE00011F X-Stat-Signature: c8h6mrar9uruz17q51sdz5do8gibxrhg Received-SPF: none (linux.ibm.com>: No applicable sender policy available) receiver=imf21; identity=mailfrom; envelope-from=""; helo=mx0a-001b2d01.pphosted.com; client-ip=148.163.158.5 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1619436555-684088 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: Hi, On Mon, Apr 26, 2021 at 01:10:04PM +0300, Vladimir Isaev wrote: > Commit 4af22ded0ecf ("arc: fix memory initialization for systems with two > memory banks") fixed highmem, but not for PAE case when highmem is > actually bigger than lowmem. > > Signed-off-by: Vladimir Isaev > Cc: Mike Rapoport > --- > arch/arc/mm/init.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c > index ce07e697916c..59bad6f94105 100644 > --- a/arch/arc/mm/init.c > +++ b/arch/arc/mm/init.c > @@ -157,7 +157,7 @@ void __init setup_arch_memory(void) > min_high_pfn = PFN_DOWN(high_mem_start); > max_high_pfn = PFN_DOWN(high_mem_start + high_mem_sz); > > - max_zone_pfn[ZONE_HIGHMEM] = min_low_pfn; > + max_zone_pfn[ZONE_HIGHMEM] = max_high_pfn; This is correct with PAE40, but it will break !PAE40 when "highmem" has lower addresses than lowmem. It rather should be something like: if (IS_ENABLED(CONFIG_ARC_HAS_PAE40)) max_zone_pfn[ZONE_HIGHMEM] = max_high_pfn; else max_zone_pfn[ZONE_HIGHMEM] = min_low_pfn; > > high_memory = (void *)(min_high_pfn << PAGE_SHIFT); > > -- > 2.16.2 > -- Sincerely yours, Mike.