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 92CA0C98309 for ; Wed, 23 Sep 2026 09:15:56 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 781F26B0092; Wed, 23 Sep 2026 05:15:55 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 7596C6B0093; Wed, 23 Sep 2026 05:15:55 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 66F4A6B0095; Wed, 23 Sep 2026 05:15:55 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 375BD6B0092 for ; Wed, 23 Sep 2026 05:15:55 -0400 (EDT) Received: from smtpin20.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 94C5D1C3413 for ; Wed, 23 Sep 2026 09:15:54 +0000 (UTC) X-FDA: 85244469828.20.CD1E78F Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf03.hostedemail.com (Postfix) with ESMTP id D820320003 for ; Wed, 23 Sep 2026 09:15:52 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=SMhlc0Vg; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf03.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1790154952; 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=O74zCChabJPGX/5FXG7XmXwrySBRD///uZE1gOiATno=; b=y/DEqf3eU8MtDNMTEu/rGGVhlNrrkklibM7MiLoyiFdZZvLnQxrdIvBJq98gxeK4YXCggA U3EdlTea/1tqlSidavapgoTL7PuxILAu+rwtpiuPklPpc2HmdrkBMS1diBY5ojWq/bfHtp STL5Z300OxsA9kHwkHHTXmuhLVdchGU= ARC-Authentication-Results: i=1; imf03.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=SMhlc0Vg; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf03.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1790154952; b=vauIXOwZIMtf2yHEoudekG99KOPWFJUKzAQUBUu19VDYC0fvsn9RVCVA4dK2yxGJCHkVF1 USTFClnFkoNpDcrbmJw1Ae0jLem0o6td1nEjaxWU6K/Hx8g989BeIdB8a05diuarIVuw7Y WXXBTbIegV5gK4hCnhpnvuKC4qvv4II= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 23562601FB; Wed, 23 Sep 2026 09:15:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC3B61F00899; Wed, 23 Sep 2026 09:15:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790154951; bh=O74zCChabJPGX/5FXG7XmXwrySBRD///uZE1gOiATno=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=SMhlc0VgRdQKdx0qwl14ANA68wVrXDsrycIDNbwUOrPzQGed7psejweuHvn9y0Upj oK9pF6NnduwDsnqfpjtJ/98OkmFP3+3GiOq1Gh9n/PtyI2qphy+ikJaaV9pWvwu/jb lgkfeUAJH/6wrnbIuYjLND8YDK30CL0Xmk3ZEGU/0LCGarFAZx7fHYPYSxTuBD/9Po M10D3egALYwoCwT9UTdFNWLlH9Bts/yO0DSd9ByK7feU9BZexVgvkgnX3iMjolsZ4N yD6SaWbdPJpvZOUAW1bcswar5pOH0YXD/VsfYA6P7+enqEtASX+lnYGFo0DZ63X3o1 OTxrzvc6LwB5g== Message-ID: <77db2f8f-dfc2-49c6-82f6-8e6c4f7c1fd0@kernel.org> Date: Wed, 23 Sep 2026 11:15:26 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 00/12] mm: make userland page table freeing RCU-safe To: "Lorenzo Stoakes (ARM)" Cc: Andrew Morton , Zi Yan , Baolin Wang , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Kiryl Shutsemau , Guo Ren , Brian Cain , Geert Uytterhoeven , Dinh Nguyen , Simon Schuster , Jonas Bonn , Stefan Kristiansson , Stafford Horne , Rich Felker , John Paul Adrian Glaubitz , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Russell King , Vineet Gupta , Michal Simek , Chris Zankel , Max Filippov , Will Deacon , "Aneesh Kumar K.V" , Nick Piggin , Peter Zijlstra , "David S. Miller" , Andreas Larsson , Richard Henderson , Matt Turner , Magnus Lindholm , Catalin Marinas , Mark Rutland , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Madhavan Srinivasan , Michael Ellerman , "Christophe Leroy (CS GROUP)" , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Richard Weinberger , Anton Ivanov , Johannes Berg , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Arnd Bergmann , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jason Gunthorpe , John Hubbard , Peter Xu , Yoshinori Sato , Shakeel Butt , Jonathan Corbet , Randy Dunlap , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-openrisc@vger.kernel.org, linux-sh@vger.kernel.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-snps-arc@lists.infradead.org, linux-arch@vger.kernel.org, sparclinux@vger.kernel.org, linux-alpha@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-um@lists.infradead.org, Hugh Dickins , Qi Zheng , linux-doc@vger.kernel.org References: <20260922-rcu-pagetable-freeing-v4-0-fe1ad1f1e303@kernel.org> <20260922160021.a2fc65d05d9b867a141e5457@linux-foundation.org> <9dcde7e4-dadb-4644-9dff-7fd8a26e29a6@kernel.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: D820320003 X-Rspam-User: X-Rspamd-Server: rspam07 X-Stat-Signature: dfapmfcuzzsaw9e43hhyug5fsf8gu4ef X-HE-Tag: 1790154952-337997 X-HE-Meta: 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 iHdCsNr+ QKXR9LFcYSU/bNXWw6W9dQuodfryBdCyVIyI59YFrYRBwAsneVJP/Gz+9S6/og2mzBd1JvAWgQ0d5H1Gjg/XAf0TR4kYYg8o7tkfY7yPE/yaB4O0ZQAYl0N7iVAj1xZMpF8Y7y2u8da719L1X56zy8Ns06uAHEWPz/g+iON4rUyagQHfaOLIXzr7Wiu0SSsV9+IV95VJUyxywQnVzFRVJ3/FbyRHjjkFtHw2EZ/xCyZf9/sGgQ5ObEAgFf0UgChsD+BWidOGbx9z2G2eo2W7WdT0jR7AtllDI81RDskHrG11NZwrbVmhxBWLCOC4dz1Pz1ZKKVnshfph8h2o= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/23/26 11:04, Lorenzo Stoakes (ARM) wrote: > On Wed, Sep 23, 2026 at 10:45:33AM +0200, David Hildenbrand (Arm) wrote: >> On 9/23/26 01:00, Andrew Morton wrote: >>> >>> >>> Do we have reason to believe that anyone is seeing any effects from >>> their arch's failure to rcu-free the page tables? >>> >>> This sounds like a rather long-standing wart, yes? >>> >>> The patchset is thinly reviewed and mm.git is bursting at the seams >>> again. I'll play wait-and-see on this series. >> Do we want to nudge arch maintainers to review? > > (Just to note that I replied separately, 'thinly reviewed' is incorrect, it's > been in -next for weeks and the whole thing was reviewed by Kiryl.) Ack. > > The only places where that would be useful is m68k motorola, sparc32. > > But in any case it has been heavily tested including on every single arch > listed with stress testing performed (I think I cover that in the cover > letter). > > The changes are not controversial so I don't think that's a blocker, but > it'd be nice? I doubt we'll ever get sparc32 reviews :) I'd definitely appreciate some review on the arch bits from arch maintainers, but if they don't reply within the next weeks I wouldn't wait on that. -- Cheers, David