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]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 934F7C88E50 for ; Mon, 14 Sep 2026 03:40:08 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6BF576B0088; Sun, 13 Sep 2026 23:40:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6707F6B008C; Sun, 13 Sep 2026 23:40:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 538576B0096; Sun, 13 Sep 2026 23:40:07 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 26A9F6B0088 for ; Sun, 13 Sep 2026 23:40:07 -0400 (EDT) Received: from smtpin21.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay02.hostedemail.com (Postfix) with ESMTP id DBB20120F49 for ; Mon, 14 Sep 2026 03:40:05 +0000 (UTC) X-FDA: 85210964370.21.004459F Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf02.hostedemail.com (Postfix) with ESMTP id 269CA80003 for ; Mon, 14 Sep 2026 03:40:04 +0000 (UTC) Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=pHy6fbef; spf=pass (imf02.hostedemail.com: domain of akpm@linux-foundation.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1789357204; b=nCApyWcvmGH8hh3SlmHKxXu4cwG/WSP0bHfTSWqgjiewRg8V1v9pZypbeRKbDs7wcOK/jF wA+l92q8VNs5F0xLWLA5xuFZlLw7fY0cRAW5n970r+rb02i4FCztA3RDKI2QZAHZSqr4zU nH6IDqBkrDd02Zp+GfuG/1UzDq/rIag= ARC-Authentication-Results: i=1; imf02.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=pHy6fbef; spf=pass (imf02.hostedemail.com: domain of akpm@linux-foundation.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1789357204; 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=x5zisV7HoQ8XMweM1XOT4E07P1NlnKsteMfQzVmO4Js=; b=ylN0NUXObimRFEH6oFNS7jewf2YF4W6FOWjYJg05EEemek33fTQPfMAWj1RD0Cu8e+bdoo 8XdAZCb56E8HSMqv9hjhf7rjE9u0hAyODV1cT+ArLXPcoEibVLvhilwBGKPCuD7yV2l+53 wyn55lRPN+TNTBB19eD43xy27SfEIhs= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 8DFC540A5C; Mon, 14 Sep 2026 03:40:02 +0000 (UTC) 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) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 269CA80003 X-Stat-Signature: 1ysohpioraf5h5udows4fqxuorj85qen X-HE-Tag: 1789357204-244537 X-HE-Meta: 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 TKPM78EZ bXBs7mLXFyhj/EhgWo6ZJeWrEiBjvTKgWWxIj52tjjPh1IdmAyISkaCM8Gc16JF6DfW4DWdcD4rW7Sd38H0WGwxKf4gYMgis8N67DtR9ZKqiGJkjjkL0lQ21Tk4zCecSppk52M2YBLM5qcqyt+02eDL0uG+XBliiPayLhbfnt3TBFO8WdHV/lRCZj7UdQ6e8M9EV4c/rTwYZ+0be4V4nK4gKoFpkWQpS3ABEFR/KICfHfRdMWDdD8fxu7QkNKynv29RYeZ98m8+CMK+TIt1U3o2dHE45NYYnM+bZ0U0iu5mQ3X0zjLQHmKDBOhCiYCtugBYt6WDnReYcA3Y67HND6hOfCLgyX2e/mkgFQgwEunjJ4RyP+yMHbGWNnCiFaELu/cEXvl1fCAuojmjYFHj59SfyeMtBzlQYC+NkITrGcR348CHXdLT5iNDaJLmnqx2i9+5Hfp+SZlwe7RT0= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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.