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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 31EDACA5FA2 for ; Mon, 28 Sep 2026 12:07:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Emp0vEWsJLoM+jNHFFwlUPHY3NPCwuPIv+AnihJOnMU=; b=Ql6E94EzkNKa42 1uEl27CRSfqdmJWQfLJLw7kOun7YyTmdcp5bW5+qsSz2S/bfn/2Q7MfHZtN2ZLMNvAEQUw5mWbu90 xDf3oachvVYop1IOf4KlSECTWejSgWNXx58sQK/x6AsBgg/1PvhzmPOvskZV4uE08V9Gd3GL1c6Pw 4sDXpqFmnmhhHYYA2W/VcxpaS723vWYUtluGjZttye0Z3hj6aP0gPhyzxpDgbN2+vmG6b2Z2iBPRN dLsXXKFxzb3qHc1nmwkcpcEAgnEP5mIif+lcYB8LsUSN/6n8j9rO1mBy6Aa5szbGKSlw4U1NtXlBr RL8qdVyk/vCZT6ZtFbLQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xBA8G-00000000Wh5-2Bck; Mon, 28 Sep 2026 12:06:56 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xBA8E-00000000Wgk-2NZ3; Mon, 28 Sep 2026 12:06:54 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id A678843D4A; Mon, 28 Sep 2026 12:06:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F2D11F000FF; Mon, 28 Sep 2026 12:06:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790597213; bh=X+J2tmzVsgooMXBbKivE7bEvNfx2Ag9Y7fspt+jroYc=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=ZM4pATIsX2hT8zVjh+/O7BaWcif1c4FeEots55BNVQ1Mx9iZ1bILJzL1cp3i+SxFL vDQ1FQFTOctpx4oEcNE41IjsJxt9Iu5JECieYmlGJDMh6fAwKZ38/yuPA+TLmmNwJQ 5vyj8YgTP3Gjh9k1zZWvvSc6b1EEwjnRO8tk7IYj5gqdkMRHc0o3fvlQ36u2GJWF2E 2cV8TbA4Ffe7iKukUkkOEq6+eRTjIaIyJKsBC8rqm3MQQ4xvzxT7Wh4R0cWK6i2ivc LHow86aIUs5raGniD+ujL659sTH1zZI7ncmRSs78xGgDeutYj0VsS2yWSjZemekhPS 7o/JAv+f61zXQ== Message-ID: <232ea2c2-a594-4a31-8ec8-7884707f1bc9@kernel.org> Date: Mon, 28 Sep 2026 14:06:22 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 12/12] mm: change the contract for free_pgtables(), update docs To: "Lorenzo Stoakes (ARM)" , 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 Cc: 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: <20260925-rcu-pagetable-freeing-v5-0-31e91065fea4@kernel.org> <20260925-rcu-pagetable-freeing-v5-12-31e91065fea4@kernel.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 9/25/26 22:09, Lorenzo Stoakes (ARM) wrote: > Now that page tables are freed after an RCU grace period, it is safe for > read-only page table walkers to walk page table ranges that are being > concurrently torn down, provided the mm is kept alive via mmgrab(). > > It is however unsafe for writers to do so, as they must obtain an > appropriate lock to do so safely. > > Update the pte_offset_map_lock()'s comment block to reflect this. > > Similarly update the process addresses documentation. > > Acked-by: Kiryl Shutsemau (Meta) > Signed-off-by: Lorenzo Stoakes (ARM) > --- Acked-by: David Hildenbrand (Arm) -- Cheers, David _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv