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[2620:137:e000::1:20]) by mx.google.com with ESMTP id m18-20020a170902f65200b0016403c4ee3esi9789306plg.546.2022.07.03.08.07.11; Sun, 03 Jul 2022 08:07:23 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=uX4wIiXM; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232679AbiGCOw5 (ORCPT + 99 others); Sun, 3 Jul 2022 10:52:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51206 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232646AbiGCOwz (ORCPT ); Sun, 3 Jul 2022 10:52:55 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 282EF10DC for ; Sun, 3 Jul 2022 07:52:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=wUvBQCKrc374bGTpdex4sW2Vzf0pP0Ed5hAguBT3ZdQ=; b=uX4wIiXMSzYxPjzsbR3395x39F RDKib5kzdS7y0dl/AgWgPI5fjMBREAcrr9JJoYZayb2iAia73uEhAqWU+9WVLRiNMY5gRM20TSKNB s+AiIBx+njGTY1MYVwc2K+IF/6wNjWCS0qv5gZlmUcJ1it+oaw28TEjh13ycIkUbI1KOzGSv4HSfH oOlo4hfWN6Yo/9eBUUwgS+wcbKikIcmC64WdEYcaV29HkkJTIZUkswzGRYq1+DLDVAKO33SJ80Dfa 5rtV0ps3Oi9KAAJ3NPx/x+BeJp22zYfr8q4J5o/HiBuYUXBd5j+timcGdRBxktw1xcIsrWD2xnFTK qmPqDpJg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1o80xq-00GVRn-EG; Sun, 03 Jul 2022 14:52:46 +0000 Date: Sun, 3 Jul 2022 15:52:46 +0100 From: Matthew Wilcox To: Baolin Wang Cc: Mike Rapoport , akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH v3 2/3] mm: Add PUD level pagetable account Message-ID: References: <6a6a768634b9ce8537154264e35e6a66a79b6ca8.1656586863.git.baolin.wang@linux.alibaba.com> <1234a28a-dca0-5836-9066-4ab2d4fbcc95@linux.alibaba.com> <17df0d3c-caaf-ee34-f702-1d4e7674887f@linux.alibaba.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <17df0d3c-caaf-ee34-f702-1d4e7674887f@linux.alibaba.com> X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Jul 03, 2022 at 10:06:32PM +0800, Baolin Wang wrote: > So for kernel pte page table allocation, I need another similar helpers like > below. However they do the samething with > pgtable_pud_page_ctor/pgtable_pud_page_dtor, so I am not sure this is good > for adding these duplicate code. Why do we want to account kernel PTE page tables in NR_PAGETABLE? I think that's confusing.