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Salvador , Mike Rapoport , Vlastimil Babka , Lorenzo Stoakes , Baoquan He , Michal Hocko , Johannes Weiner , Jonathan Corbet , kernel-team@meta.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: Re: [PATCHv4 02/14] mm: Change the interface of prep_compound_tail() Date: Wed, 21 Jan 2026 11:32:12 -0500 X-Mailer: MailMate (2.0r6290) Message-ID: In-Reply-To: <20260121162253.2216580-3-kas@kernel.org> References: <20260121162253.2216580-1-kas@kernel.org> <20260121162253.2216580-3-kas@kernel.org> Content-Type: text/plain X-ClientProxiedBy: SJ0PR03CA0057.namprd03.prod.outlook.com (2603:10b6:a03:33e::32) To DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB9473:EE_|SN7PR12MB7180:EE_ X-MS-Office365-Filtering-Correlation-Id: 42069c82-ae48-4a54-fa03-08de590aa477 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: 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X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jan 2026 16:32:17.7999 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: kBxMH1uHkWvs8ntzyAqWfCWolryOcz4ORTeR8Fzl+BO5JHiAufitpbCXipJDgMvx X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB7180 X-Stat-Signature: 47y1uoxyudrkqqfdh81zfezqtu1o7n6w X-Rspamd-Queue-Id: 037F640015 X-Rspamd-Server: rspam02 X-Rspam-User: X-HE-Tag: 1769013141-680808 X-HE-Meta: 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NbdVI2LlV4kAt8ip7vv6D2yJvTEfIDZbhy9keXgkJERQT9SQ68U+9wGq5U3biBDa45MnWGcv3svguIhm+CG4mgIm+4O4UHp3HeEQs5gqFZigvdLkgyH7FjB7MM2R7QOQKCZOFLmyKvpSwZMSLSCjUuXn756e0Cf0pItMvnfZ8rCwRS7Dzl7gfgBZ8DCG3mKBWmfvD5UkPOKu4AyD5QiPH9nHi+HG25XZ4rG9Bh9mLhFcSk4VkZUvHNb9NtdPEemEnU1YIPDl2tpVp0a1ml0d0T9ZSCqwb33afIxaYdo9B1IEFa/+UuONZvU7ZBGTF8Q0udHSoaVG0+q24ts4yMiMvWCAJaPWwnH7evQ0hXKY15BgCqXgoUIDRbEYi2LMykLTkBzyL 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: List-Subscribe: List-Unsubscribe: On 21 Jan 2026, at 11:22, Kiryl Shutsemau wrote: > Instead of passing down the head page and tail page index, pass the tail > and head pages directly, as well as the order of the compound page. > > This is a preparation for changing how the head position is encoded in > the tail page. > > Signed-off-by: Kiryl Shutsemau > Reviewed-by: Muchun Song > --- > include/linux/page-flags.h | 4 +++- > mm/hugetlb.c | 8 +++++--- > mm/internal.h | 12 ++++++------ > mm/mm_init.c | 2 +- > mm/page_alloc.c | 2 +- > 5 files changed, 16 insertions(+), 12 deletions(-) > Reviewed-by: Zi Yan Best Regards, Yan, Zi