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b=dZqduA64+4APuYSKcyM4Q6f15K8xx2OrHRQrnc3prPGwKo/QKZ2ofY1bleRUurssr UYWIaQmvf6YIkG8pXCALoxNg7xRBsn+Vrdnv341prK8bpJHr89hIX4IpXjNn0ixBAJ aeyiPqVDkhl+sapMmXiNxFv+ETfUFpSair5o5e2lHSBLaMAGNRey0lR6GofQBo8ogs O7yqD7UTMqgJDi0QHfvMDWDK216oTTwnZy7A+aNcy9Ys+UwBbJEhVc2c+I9MiNzwgr KtMFXrm1fcJ7Gs1sXiSVc/vMEOIrxDOQHrSScnTaBuikIZz+oegiTJBJuhB2exQsMI ayPe6H96YTFcA== Message-ID: <51f96b31-fb59-4cda-9d33-e3cebc45686b@kernel.org> Date: Sat, 7 Feb 2026 23:08:03 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] mm/page_alloc: clear page->private in free_pages_prepare() From: "David Hildenbrand (Arm)" To: Mikhail Gavrilov , linux-mm@kvack.org Cc: akpm@linux-foundation.org, vbabka@suse.cz, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, npiggin@gmail.com, linux-kernel@vger.kernel.org, kasong@tencent.com, hughd@google.com, chrisl@kernel.org, ryncsn@gmail.com, stable@vger.kernel.org, willy@infradead.org References: <209207FE-D3A9-4BE2-8DA7-9BE38A19F387@nvidia.com> <20260207173615.146159-1-mikhail.v.gavrilov@gmail.com> Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Stat-Signature: h8z65xinphpyhknuwymzi7ukwogiq3sf X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 66AE1100008 X-HE-Tag: 1770502092-147418 X-HE-Meta: U2FsdGVkX1+uF4g2BxCaAIcrNkBltSexJidDdUFdDR2AliTXTyTiWX2ahq7NVLQYntNQK4sqLPmntYOUMI0Td22JFaKYGm6O8ziSXOXBieZCcTjM22WWRoOfZ7Oj7L1PSc9qwOs5OujgvtzjnblzvCe+AzvxKFPRj5Bg4ou0znkXrMzn7WycCYQF08AEmAPfRj4VZFYJpr5oPUnuC+RPX78XipPtx3gOGd+74BmlMWuJEykbrSI2FUZHWn+AxDTsytHJWYsTPGwh6++clpuG2D6gYwt83jbd0Ds0yR8tehnV+4i/VDGpsQms6O9b4M7WLw2/gLZ/HTvLUgTt96qAGH1E73fRN6HtkewBhTRHwaUqRzKsKdVv6BGZ59v7pwnSRHVJK5TPQjyY37TUgmyDc92B3cJd4VKeJrTZTYWXNgIQsws+uiGxEQhkzr/3D2Zfxu3tZCG1++Iq2mDLylcJgSU6LW6g6oZTFPbK5H7OSOo5Uprbg49tEIfKceHYPh5Mj2Dp1i1/s1U3oT8RY3LzaBd8xm5H1Rilp1fbSAFsrUkUEFktffUS8KWzI9f1bbHlXpR9NPXukk/sjj8/wJkG13Tu9Urf+FKY1gqW0ZDW567KwmTqXggv6dK//PmaZ38RfIXoibvTkzcakvj8QJ5kOB27f+RsUnOuospzUye7SSltMwCtMzcO0nnjr9hsebSRSobwXNylyhehQsxkVtnAcj9X7nwjtTVsk99OHr3R7/55q/9JoZq4VRREhm6nH12BnmTb4pxlh3iE6C/9KeyfNNC95U839BagBdNNygfQTPR371i/hYGcNOXps2+8y3qzhV2ra2lncFB20h7lqVqcLIavf+mj6TKjlBy07W1kMnFMIr32gDyofwfPfjwH1xGWdIlC5Uf+J4pg8aVEWLKhaQlvccaU3THCMLHPednBEYFQoMmuY+6VjmS6Wrj0jnoMV5Q2odPZ+xTi+wQAH9P 1uv7FHhf s/oF4UkMwEXUYPLxefmFD+CLTYaOKTmj3SkE9RVBXF87zRGTDtqQzb5XJYJ2VxucglgmpOtcQh5/S/ppk5FdG33Ra8Wi6S/HNeiAvnM3sRMBcd14bSkuovGkad9YMQdHqafjxFunHuZen7Fr3RS72stx0UcNRNDOoGH0vWqKbl28AaFhTJoQR3SBCMoboKdhy5dnKbTdaWx8pHQhlJMjVw8VQHSu4KWOI5baEfQ7Nh5k05rAfq88u6ExH2PmK60PM6BsYvD5/RRpDVkdt1n2PSU/RYXO8+K/Yv52o3hmZhrZPhi9Iqo8V1iPeb+U8SH2Q3f53is6FTCf+p7qRNF4F/dFGAP8Kduem4XNnLBuIn3tvt9JXtHvdNaTghYk4RQSKq+tu3bPcXPyiX7XWTZ4Hx0TYAw== 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: > > -               /* > -                * page->private should not be set in tail pages. Fix up > and warn once > -                * if private is unexpectedly set. > -                */ > -               if (unlikely(new_folio->private)) { > -                       VM_WARN_ON_ONCE_PAGE(true, new_head); > -                       new_folio->private = NULL; > -               } BTW, I wonder whether we should bring that check back for non-device folios. -- Cheers, David