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 CDFAD481A82; Wed, 23 Sep 2026 13:43:41 +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=1790171022; cv=none; b=tuuggu2TYkDkJpjtI9ea/370KK1LckH8LynCBjjV9j9EA2PsD2tkiHVf41R6wD9dCYCnovpiHz0CTzEEbGeyAm20IBRroo8XRgF2Vp3IOTRswPCJaogxEAEWkF58RIj5o2ug6BMal3E1IU6iE/ELuO3sEYvi1pSChY8fKy3gTho= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790171022; c=relaxed/simple; bh=263Kz0c63eAZU3G8zs+kKv0GGoxPDsYu96TYT+oIxWM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KCw0YP2UM7z2/OA9I1D9FlfS8c/xu1u6+QsRebnhUFYULCwuB+Sv+qIaYaab3zKJnvsVjmfmILYttMM3DnbPQNFTGvB6kJqqgt7A86l/50uj0hJUYHOyG3qaYs8BHrzQPNeA718pwXRvTJGkzDEX1sbTJmhU8qTixWYO8BzOYBI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=odmxHHcp; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="odmxHHcp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73A5C1F000FF; Wed, 23 Sep 2026 13:43:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790171021; bh=6xDgTcRD17pMZUKjE+n6zU9uG96i5536rlsM5iR5TPE=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=odmxHHcphfJU/2dNQHFnLCZHx7qUsOTN2unPx/tuy1nXDSyLZmeYwR7/Rjr7jfT77 QnuCynM47lsKoqJC1y97i+U1JvZkZUSXp9zkXwbycdpb9XJ+pApXutz7lCcNFAJ3vm vBWH4cHO+xn5wlHRsn6xzSZJ9/9k5KZaXvlcM22x8ZHXT/+6kz62RqW65s76Lppcuz F5EUgyH8Kf2PVj50ygyL2QutGkc1XBv8xpCS/e6hY65wLgFvWhIpVu4lKscZxay6Tm z5HHhYChWlwV8Hq1DsRMOKqUEfxwlsCQ4YbcBWu/p5tcGD9PmvWztotX9Xy/LdT1Kq 9Ab6m9tid+4dA== Date: Wed, 23 Sep 2026 14:43:16 +0100 From: "Lorenzo Stoakes (ARM)" To: "David Hildenbrand (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 Subject: Re: [PATCH v4 11/12] mm: make userland page table freeing RCU-safe Message-ID: 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> 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-Disposition: inline In-Reply-To: On Wed, Sep 23, 2026 at 03:38:53PM +0200, David Hildenbrand (Arm) wrote: > 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 Ack OK. > > -- > Cheers, > > David -- Cheers, Lorenzo