From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-99.freemail.mail.aliyun.com (out30-99.freemail.mail.aliyun.com [115.124.30.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C307381AF for ; Mon, 6 Jul 2026 00:52:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.99 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783299136; cv=none; b=U36C1JhnkQBq4wnG6QqzkmaZ9KPBmfbM9XeGk21zkBHdkyAKjvvLtPEU39/qMHS8tepui4haJTKWU4rfPZxfvgi7hQYCyk+RAGDUg+9a88ZPpYHZViT1vrFxMmx4sadPG/uPoILzJtot5jWzdU+pMxkTLvgLtao6ShQbGUmIjUA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783299136; c=relaxed/simple; bh=0b8+yQLI79h5RP6g12hfZDbxJOpLFPRKUQfP3nn2UiQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=c61IffnT/HllM6azaInbViiHv5DD5GVDspba8vKWqWoZnpUlMWRWQ5z+lzQdMJ8dBUDbYC0iRLhE4YJ/tM8V1TftfIQQKiwuakTuCv5Fg5588MEFfKtXZ6pNZSub5W29upvJYaPOBlLsUIndjy9oGzehDxtqCfi0KZAqKhwO/cc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=rZWcv79W; arc=none smtp.client-ip=115.124.30.99 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="rZWcv79W" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1783299126; h=Message-ID:Date:MIME-Version:Subject:To:From:Content-Type; bh=xdQ2+UB9YUz4QE1uOCpiZhN+N4NOLTFeGmjHmR8pLiE=; b=rZWcv79WpysYiCbzOjWCIHrTl/HEDhmaSAk3AfxOQUI/kCER4zK0O0Lj6laEXYsLsi026k3B4h6+98P4wS7AT7WY4E8a30eUk2FL7N5TRWYjNkxDt7XwMTRfoKAacoKy1NvR981diSK8S5IjngNNknAl9yuUHUxu4zjNddaaDyo= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R891e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037033178;MF=baolin.wang@linux.alibaba.com;NM=1;PH=DS;RN=22;SR=0;TI=SMTPD_---0X6Otcp-_1783299123; Received: from 30.246.104.96(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0X6Otcp-_1783299123 cluster:ay36) by smtp.aliyun-inc.com; Mon, 06 Jul 2026 08:52:04 +0800 Message-ID: <5b857bac-bd4d-4672-a30e-f731ec6f5e86@linux.alibaba.com> Date: Mon, 6 Jul 2026 08:52:02 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/5] mm/huge_memory: add page->private check back in __split_folio_to_order() To: Zi Yan , Andrew Morton , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Mike Rapoport , Dennis Zhou , Tejun Heo , Christoph Lameter , Alistair Popple Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20260703-keep-subpage-private-zero-at-free-v2-0-2970fe777dd6@nvidia.com> <20260703-keep-subpage-private-zero-at-free-v2-3-2970fe777dd6@nvidia.com> From: Baolin Wang In-Reply-To: <20260703-keep-subpage-private-zero-at-free-v2-3-2970fe777dd6@nvidia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 7/3/26 9:47 PM, Zi Yan wrote: > page->private should not be set in tail pages. Commit 4265d67e405a > ("mm/migrate_device: add THP splitting during migration") removed it > without a proper reason[1]. Add it back. > > Link: https://lore.kernel.org/all/13f3fcda-7328-4aa5-afc6-75a294a82b2a@nvidia.com/ [1] > Reviewed-by: Lance Yang > Signed-off-by: Zi Yan > --- LGTM. Reviewed-by: Baolin Wang