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 2D760ECAAD3 for ; Thu, 15 Sep 2022 01:40:50 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B12B18D0001; Wed, 14 Sep 2022 21:40:49 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id AC1386B0073; Wed, 14 Sep 2022 21:40:49 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9620E8D0001; Wed, 14 Sep 2022 21:40:49 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 885CA6B0071 for ; Wed, 14 Sep 2022 21:40:49 -0400 (EDT) Received: from smtpin23.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 5CCB4A0628 for ; Thu, 15 Sep 2022 01:40:49 +0000 (UTC) X-FDA: 79912615818.23.736A26C Received: from out0.migadu.com (out0.migadu.com [94.23.1.103]) by imf29.hostedemail.com (Postfix) with ESMTP id CBBA51200E9 for ; Thu, 15 Sep 2022 01:40:48 +0000 (UTC) Content-Type: text/plain; charset=utf-8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1663206046; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aHrMqKnOhvrceoKDNwr4kJF7nEDwLaJAxZRfEElDacM=; b=NOK9QL6c//UcrFx6c0l7e3u6T3ikeR3S7RiyaScZazN8wsGha6NRbAbuzX4Cfw2v+zq51Y 7CWGErYlPAkwbIO4kuO4+cMqn8M24j/UIslfY4vEJndq6Dr5HZHgWQgt5QZbpKCgE0E2+f vqonwUNyZXx1RB2YKrAjmb9GjSVqg5M= MIME-Version: 1.0 Subject: Re: [PATCH 03/21] mm/hugetlb: correct demote page offset logic X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Muchun Song In-Reply-To: <20220913195508.3511038-4-opendmb@gmail.com> Date: Thu, 15 Sep 2022 09:40:34 +0800 Cc: Andrew Morton , Jonathan Corbet , Rob Herring , Krzysztof Kozlowski , Frank Rowand , Mike Kravetz , Muchun Song , Mike Rapoport , Christoph Hellwig , Marek Szyprowski , Robin Murphy , Borislav Petkov , "Paul E. McKenney" , Neeraj Upadhyay , Randy Dunlap , Damien Le Moal , Florian Fainelli , David Hildenbrand , Zi Yan , Oscar Salvador , Hari Bathini , Kees Cook , - , KOSAKI Motohiro , Mel Gorman , Linux Doc Mailing List , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Linux MM , iommu@lists.linux.dev Content-Transfer-Encoding: quoted-printable Message-Id: <1CA76834-D826-4799-A114-0E27A10D062F@linux.dev> References: <20220913195508.3511038-1-opendmb@gmail.com> <20220913195508.3511038-4-opendmb@gmail.com> To: Doug Berger X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1663206049; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=aHrMqKnOhvrceoKDNwr4kJF7nEDwLaJAxZRfEElDacM=; b=wZdB/9sTTglLq2qj66oTnqf8L4/UXU6HY5MpB7VZlxTEDx7uSoHKZgsA6o9/fiCsDWnS0C jwmIUhC2vOVU5OOj0QIhKJeaFMq+T/3A27Y0axTlSEIJ/uJpMdZvFK/DaxJec2FHA6EDv8 2epQI/LCXu6ohvBE0+U0QyyWzbMu2B8= ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=NOK9QL6c; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf29.hostedemail.com: domain of muchun.song@linux.dev designates 94.23.1.103 as permitted sender) smtp.mailfrom=muchun.song@linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1663206049; a=rsa-sha256; cv=none; b=kVrVWvEvUnWchd8t5gBSmpqRcUiWV2hxa4v3iuACntzBLr5c2EWwh27WD44LDiuGfKAxMY QPhJV1RKDxCVww2ZyFcNVck/pFUE8BL9nF1sKKSTq6qM/sGXQ5viOLocWsjT8eK/7Wv33L oQSuAJtj1yBfCcH9ClPcW1CCT/CPw4s= Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=NOK9QL6c; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf29.hostedemail.com: domain of muchun.song@linux.dev designates 94.23.1.103 as permitted sender) smtp.mailfrom=muchun.song@linux.dev X-Stat-Signature: uexfbe1ebengo1q43735c68y933uq14y X-Rspamd-Queue-Id: CBBA51200E9 X-Rspam-User: X-Rspamd-Server: rspam09 X-HE-Tag: 1663206048-897921 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 Sep 14, 2022, at 03:54, Doug Berger wrote: >=20 > With gigantic pages it may not be true that struct page structures > are contiguous across the entire gigantic page. The mem_map_offset > function is used here in place of direct pointer arithmetic to > correct for this. >=20 > Fixes: 8531fc6f52f5 ("hugetlb: add hugetlb demote page support") > Signed-off-by: Doug Berger With Matthew=E2=80=99s suggestion. Acked-by: Muchun Song Thanks.