From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 DDDC435C19F; Mon, 14 Sep 2026 03:40:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789357204; cv=none; b=Bz1bbXd7g4NUI3TERWNuqN74MGxTnxFVv/D9qfJCGbjIX8y4dSddxUAnVMoTQIuvvk2/BeXDP4tQoGeCHS3hWoXy5e+9HCO4f4f3ab9myjIDqevIEHGYe4mLj2MGVr9PmIX4JoGEBfYl9t/v2xxBGZdS3JvdFhbEK1T6yDoyIp4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789357204; c=relaxed/simple; bh=1A6s3fqev0839R6hce//sj+/jCLqDJTSBW2SC0bjfpA=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=YAIijsDBCk/O1l5y7L4q9Ort/+eTEJIG8ZLJxbEq+oY7rKz6bFNyRj9Uk57UkpPJq5pN4eizEHIJ6GE+Am3ubyyHbleMWkup/vT1EXfckm2ZsjQl9gIO10FbbWTE/3qXytcuLSj8wKwVcaGw4LgMoyauMnmGeuUqm/bVrKwe8EI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=pHy6fbef; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="pHy6fbef" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92FF91F000FF; Mon, 14 Sep 2026 03:39:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789357202; bh=x5zisV7HoQ8XMweM1XOT4E07P1NlnKsteMfQzVmO4Js=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=pHy6fbeflVTU8QtsqFS5eh8OvOR3ntwRr+lHZYMkoAT3ltm91/zKHpwN5XKZntEOS ILIVvwKavB+/VLgc77oFP5R90/PbqE2ALcouMF/TdFK9XZ9ovr5QioyLZB1yLh6r2e gdt1bOJXa+0zPlb1i7I7WNxSlmbqXRfHn0UsNCp4= Date: Sun, 13 Sep 2026 20:39:59 -0700 From: Andrew Morton To: Zi Yan Cc: David Hildenbrand , "Matthew Wilcox (Oracle)" , Muchun Song , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Gregory Price , Ying Huang , Alistair Popple , Johannes Weiner , Qi Zheng , Shakeel Butt , Kairui Song , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Minchan Kim , Sergey Senozhatsky , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Thomas Gleixner , Borislav Petkov , Dave Hansen , x86@kernel.org, Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , "H. Peter Anvin" , linux-perf-users@vger.kernel.org, Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , xen-devel@lists.xenproject.org, Eric Biggers , "Theodore Y. Ts'o" , Jaegeuk Kim , linux-fscrypt@vger.kernel.org, Oscar Salvador , Chao Yu , linux-f2fs-devel@lists.sourceforge.net, Tal Zussman , Gao Xiang , Jan Kara , Yue Hu , Jeffle Xu , Sandeep Dhavale , Hongbo Li , Chunhai Guo , linux-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Axel Rasmussen , Yuanchu Xie , Wei Xu , linux-trace-kernel@vger.kernel.org, Trond Myklebust , Anna Schumaker , linux-nfs@vger.kernel.org, Ilya Dryomov , Alex Markuze , Viacheslav Dubeyko , ceph-devel@vger.kernel.org, Song Liu , Yu Kuai , Li Nan , Xiao Ni , linux-raid@vger.kernel.org, Richard Weinberger , Zhihao Cheng , linux-mtd@lists.infradead.org, Baoquan He , Pasha Tatashin , Pratyush Yadav , Jonathan Corbet , Dave Young , Shuah Khan , kexec@lists.infradead.org, linux-doc@vger.kernel.org Subject: Re: [PATCH v4 00/16] Remove PG_private by using page/folio->private checks instead Message-Id: <20260913203959.6b46b0b5a052aec818a7f267@linux-foundation.org> In-Reply-To: <20260913-remove-pg_private-v4-0-848550f7574e@nvidia.com> References: <20260913-remove-pg_private-v4-0-848550f7574e@nvidia.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Sun, 13 Sep 2026 22:23:58 -0400 Zi Yan wrote: > This patchset removes PG_private to make space for upcoming PG_folio for > identifying pages from a folio (more details in Note below). Instead of > checking PG_private, all code is changed to check page/folio->private != > NULL instead. > > MM people are cc'd on all patches and subsystem people are cc'd on the > cover letter and corresponding patches. > > Patch 6 is picked up separately in f2fs tree, but since mm-new does not > have it yet, it is sent for MM testing. AI review claims to have found a pre-existing critical level deadlock in f2fs: https://sashiko.dev/#/patchset/20260913-remove-pg_private-v4-0-848550f7574e@nvidia.com it also had a few things to say about this patchset and, as always, hugetlb.c. Thanks, The MM bits appear adequately reviewed and review of the non-MM bits are, as usual: Great to have but I won't permit lack of other-than-MM review to block MM improvements. So I'll queue it all up and shall push it into -next after a few days. Acks from non-MM maintainers are appreciated. If a non-MM patch appears in linux-next I'll autodrop the mm.git copy of that patch.