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 2BB11C982ED for ; Mon, 21 Sep 2026 20:27:14 +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:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=f1EChfJar51B7k15LQ3BT1NQTLZNOAzhm+M3wGishIs=; b=VRSdHwWJG/r+KI HiFZg4iBol+zVG6eneQaOmZs50zOftafNjvtzdJNxKthcaT7Dyz18pOTtjkg6VWotWl8WnRixowoE ueOhQxAx1FYfzFlKuxwRT8g8qKtXckZqacKtAP4/s2lSAjkIyxJI7W3H5WzIO/3qGNVBoD4heznwX 9IC35qgjCekGX/vIqzjEMJooA/dDFeHkCLwn8t+KYA8qpgLokJwcsiYF9eHDUABraO0kwFMMqz755 5u7xvvb0jqoIQMtfngFUol0AzL9iksl453bGvS2DhZuLAihdJKWaXphrK6pDKmNO+rfTiIOLJop+Z 3PQ8Cc8bqH6LlFkpcD9w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8kbI-00000003L36-1j3o; Mon, 21 Sep 2026 20:26:56 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8kbD-00000003L2A-2pMx; Mon, 21 Sep 2026 20:26:53 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E89C5176C; Mon, 21 Sep 2026 13:26:45 -0700 (PDT) Received: from e129823.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 19DCC3F632; Mon, 21 Sep 2026 13:26:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1790022409; bh=YR8KjfryI7McmdGWbe5RjCYF03qe877YQVcwQ4evUyE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ZJQgJ1u3+XbrE14CRndMnlfvZodRjo8Owgd4VUfyb4ysv/TCeswI4E1slRGuH0ZC5 gEB41b7eQMFvIpiPafng381AyyipSmuL+EUBfZkrewzD7VQyDMaw6gvMc8JJ8U+oLq 2RkB+DvgV9b00Ftlc/0AMEXk2kIo1XjoleH7ftTk= Date: Mon, 21 Sep 2026 21:26:40 +0100 From: Yeoreum Yun To: Randy Dunlap Cc: Yeoreum Yun , Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Catalin Marinas , Will Deacon , Arnd Bergmann , Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Johannes Weiner , David Hildenbrand , Michal Hocko , Lorenzo Stoakes , Tianrui Zhao , Bibo Mao , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonas Bonn , Stefan Kristiansson , Stafford Horne , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-openrisc@vger.kernel.org Subject: Re: [PATCH 21/21] Documentation: mm: clarify behaviour of compile-time folded page tables Message-ID: References: <20260921-dummy_ptxp3-v1-0-cd40cf68242e@arm.com> <20260921-dummy_ptxp3-v1-21-cd40cf68242e@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260921_132651_916086_BF2429C9 X-CRM114-Status: GOOD ( 15.96 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Hi Randy, > > > On 9/21/26 3:55 AM, Yeoreum Yun wrote: > > From: "David Hildenbrand (Arm)" > > > > Compile-time folded page tables are not necessarily easy to understand, and even > > people the were once familiar with the concept might need to refresh their memory. > > > > Add proper documentation, including a nice diagram, for the current design. > > Mention details about dummy functions, including the recently changed pXdp_get() > > helpers. > > > > Signed-off-by: David Hildenbrand (Arm) > > Documentation/mm/page_tables.rst:197: WARNING: Bullet list ends without a blank line; unexpected unindent. [docutils] > > See below for a fix. [...] > > +Note that the arrows from PGD to NOP4D represent page-table-walker > > +transitions, not pointers stored in the pgd entries. > > + > > +Using p4d as an example, `nop4d`/`p4d folded` translates to the following: > > + > > +- p4d is considered folded into pgd; both are operating on the same page > > + table. > > table. > (add one more prefix space to align the indentation) > Thanks! I'll fix it! [...] -- Sincerely, Yeoreum Yun _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv