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 1317FC9830E for ; Wed, 23 Sep 2026 13:39:24 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 218FC6B0098; Wed, 23 Sep 2026 09:39:23 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 1CA816B0099; Wed, 23 Sep 2026 09:39:23 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 095936B009B; Wed, 23 Sep 2026 09:39:23 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id CB1046B0098 for ; Wed, 23 Sep 2026 09:39:22 -0400 (EDT) Received: from smtpin20.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 682AEA082B for ; Wed, 23 Sep 2026 13:39:22 +0000 (UTC) X-FDA: 85245133764.20.E5D4C82 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf05.hostedemail.com (Postfix) with ESMTP id AE21C10000B for ; Wed, 23 Sep 2026 13:39:20 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=Y7dQ0i1E; spf=pass (imf05.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1790170760; 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=Hytsnm3T/AULz6jwdvEQiSXuDHieLIGsyjjgPx+qkmI=; b=XDshGUHr+Yrnqk9xHKFRfnSc8hmz4WWCuLY+M2d137gtU3uUiCMZh0+Fgk5in+ImieG8d2 MCUJZkwC8DKZH4yyywliZL+4QKNWlwOXcuAcy1KR0kpqwXMqWjmLHVVtvIghz9y3cPGLeL SpijRqUGJIAGdRWOhOpmcpqymQD6rJU= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=Y7dQ0i1E; spf=pass (imf05.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1790170760; b=43czQSaCA3XTUw1RQl1BIpcIoDFdanDmGRCR+lqKbpe/iJ4V8Ri7Q570MpaWETNuPX1OFV SEAOIxsBtYrColvMfyJ1GkHSpcIsEAQMjygKhu09MSrti48OIApu6GMoRzfVWlxdJiT5c0 TcUwjfgIaWdmchdEZijv62OLj2zwGrY= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id CD402601FB; Wed, 23 Sep 2026 13:39:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E822D1F000FF; Wed, 23 Sep 2026 13:38:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790170759; bh=Hytsnm3T/AULz6jwdvEQiSXuDHieLIGsyjjgPx+qkmI=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=Y7dQ0i1EU1gOr2j6oh8a/xUi2rEXF5S3qQfIklY3kTYR3pCe5PUL5EMuqY4Mu9UQ2 F7NWPAVmADVhUEyuzsQMEAA/PRZKHfVkzvplyzNELB/qmdX/pXsDZ3TSY6rUDz4PG4 sWJw0HL1ouvMSKX1DwlwQHuNIeGXBk0bek7VTqTPX+ew8nHxGzgrGuBL975LdFStGf KhBI8xmiIoOGrg9/JFvdE5HdJJkuUg1syYnXQiqBV4sJdGdbXIpcbH4wVbe04ZdIzK cyVjETRbw7ye/iWCQrFjSEK/OhI9h2NPNEcH5eHxNA4rz6KnfSwgy8l+HU9SUFSArX 64OX8LKUVAHwA== Message-ID: Date: Wed, 23 Sep 2026 15:38:53 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 11/12] 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> <20260922-rcu-pagetable-freeing-v4-11-fe1ad1f1e303@kernel.org> <72d1548a-a4ee-4832-b2ab-4bc82f1933f8@kernel.org> <802d3999-95fe-4a09-89b4-d01b60f8e963@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-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: AE21C10000B X-Stat-Signature: 7y93p9cxxhkkxhxpq8qnjnfkjqrc8i43 X-HE-Tag: 1790170760-944287 X-HE-Meta: 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 2kHU5MuZ JRWyp/eAKsWHi8VuVrBp5zLGdqLz/lTG2M2B6xaAB9bBv02qvYHlYFKz3yo7+0Lks+XTYHUTvOy2xnwmcedl0z+1UNeYHbIZxkP2E6cogwcUVdY+RAgtlRgT0DEb2+qn3JP2fYfiVRiIBbIx3f2EwERIRfFwl/bT1eUcnv6oU1c7KRqmraT7C51bYwrSt+kbxXNbIsgs+xi+FukjRgJMMcn8GeqL6cojU9hHqPmvHcwnCoklvGwPAVoSZXI4gk4nSAX4aR56In1jONbc5OfEFyG5ODpvBVcudk6TiT3L+0fuZsogPL2ayG7GlW4xPE34uY4N8e1pw9kv7xPE= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/23/26 13:48, Lorenzo Stoakes (ARM) wrote: > On Wed, Sep 23, 2026 at 11:13:36AM +0200, David Hildenbrand (Arm) wrote: >> On 9/23/26 11:06, Lorenzo Stoakes (ARM) wrote: >>> >>> It is the final piece that makes that the case, so I think it's OK to allow >>> oneself a nice subject line? No? :) >> >> Just took me longer to figure out if I am missing something important. >> >> E.g., >> >> "mm: remove unused RCU-unsafe user page table freeing" >> >> would have been clearer to me. Anyhow, just stumbled over it, I don't care too much. > > Compromise on: > > mm: now userland pgtable freeing is safe, remove unused bits > > ? Maybe something along those lines, yes mm: userland pgtable freeing is RCU-safe now, remove leftover bits -- Cheers, David