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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6D72C54FC9 for ; Tue, 21 Apr 2020 08:53:50 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 67E87206E9 for ; Tue, 21 Apr 2020 08:53:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="xtIDLhOk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 67E87206E9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 495y626f1LzDqw8 for ; Tue, 21 Apr 2020 18:53:46 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=rppt@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=default header.b=xtIDLhOk; dkim-atps=neutral Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 495y1m3lYfzDqkL for ; Tue, 21 Apr 2020 18:50:04 +1000 (AEST) Received: from kernel.org (unknown [87.71.41.92]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A8A7620B1F; Tue, 21 Apr 2020 08:49:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587459002; bh=9AREcPZgTLZoOQNS4HkOJCkkvxOi7Qh0sUZN50XGXA4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=xtIDLhOks9I+BKS5TYEqFJ9Vfc6A4ZSXltBCpypI67DEgioqz+65m6OacsoeIkbAA 88yc/lqmFc8Ow2Y9SNd9/Z87ieKFQpgU+8EamCx23Pk7I9SAqDmbfCbYt/WaMhGXv6 fkQQCkLj5UymWDJxhVN8pD6iX/cTrOoL+hLaJy1Q= Date: Tue, 21 Apr 2020 11:49:35 +0300 From: Mike Rapoport To: Baoquan He Subject: Re: [PATCH 02/21] mm: make early_pfn_to_nid() and related defintions close to each other Message-ID: <20200421084935.GB14260@kernel.org> References: <20200412194859.12663-1-rppt@kernel.org> <20200412194859.12663-3-rppt@kernel.org> <20200421022435.GP4247@MiWiFi-R3L-srv> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200421022435.GP4247@MiWiFi-R3L-srv> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rich Felker , linux-ia64@vger.kernel.org, linux-doc@vger.kernel.org, Catalin Marinas , Heiko Carstens , Michal Hocko , "James E.J. Bottomley" , Max Filippov , Guo Ren , linux-csky@vger.kernel.org, linux-parisc@vger.kernel.org, sparclinux@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-riscv@lists.infradead.org, Greg Ungerer , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-c6x-dev@linux-c6x.org, Brian Cain , Jonathan Corbet , linux-sh@vger.kernel.org, Helge Deller , x86@kernel.org, Russell King , Ley Foon Tan , Mike Rapoport , Geert Uytterhoeven , linux-arm-kernel@lists.infradead.org, Mark Salter , Matt Turner , linux-mips@vger.kernel.org, uclinux-h8-devel@lists.sourceforge.jp, linux-xtensa@linux-xtensa.org, linux-alpha@vger.kernel.org, linux-um@lists.infradead.org, linux-m68k@lists.linux-m68k.org, Tony Luck , Greentime Hu , Paul Walmsley , Stafford Horne , Guan Xuetao , Hoan Tran , Michal Simek , Thomas Bogendoerfer , Yoshinori Sato , Nick Hu , linux-mm@kvack.org, Vineet Gupta , linux-kernel@vger.kernel.org, openrisc@lists.librecores.org, Richard Weinberger , Andrew Morton , linuxppc-dev@lists.ozlabs.org, "David S. Miller" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, Apr 21, 2020 at 10:24:35AM +0800, Baoquan He wrote: > On 04/12/20 at 10:48pm, Mike Rapoport wrote: > > From: Mike Rapoport > > > > The early_pfn_to_nid() and it's helper __early_pfn_to_nid() are spread > > around include/linux/mm.h, include/linux/mmzone.h and mm/page_alloc.c. > > > > Drop unused stub for __early_pfn_to_nid() and move its actual generic > > implementation close to its users. > > > > Signed-off-by: Mike Rapoport > > --- > > include/linux/mm.h | 4 ++-- > > include/linux/mmzone.h | 9 -------- > > mm/page_alloc.c | 51 +++++++++++++++++++++--------------------- > > 3 files changed, 27 insertions(+), 37 deletions(-) > > > > diff --git a/include/linux/mm.h b/include/linux/mm.h > > index 5a323422d783..a404026d14d4 100644 > > --- a/include/linux/mm.h > > +++ b/include/linux/mm.h > > @@ -2388,9 +2388,9 @@ extern void sparse_memory_present_with_active_regions(int nid); > > > > #if !defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) && \ > > !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) > > -static inline int __early_pfn_to_nid(unsigned long pfn, > > - struct mminit_pfnnid_cache *state) > > +static inline int early_pfn_to_nid(unsigned long pfn) > > { > > + BUILD_BUG_ON(IS_ENABLED(CONFIG_NUMA)); > > return 0; > > } > > It's better to make a separate patch to drop __early_pfn_to_nid() here. Not sure it's really worth it. This patch anyway only moves the code around without any actual changes. > > #else > > diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h > > index 1b9de7d220fb..7b5b6eba402f 100644 > > --- a/include/linux/mmzone.h > > +++ b/include/linux/mmzone.h > > @@ -1078,15 +1078,6 @@ static inline struct zoneref *first_zones_zonelist(struct zonelist *zonelist, > > #include > > #endif > > > > -#if !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) && \ > > - !defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) > > -static inline unsigned long early_pfn_to_nid(unsigned long pfn) > > -{ > > - BUILD_BUG_ON(IS_ENABLED(CONFIG_NUMA)); > > - return 0; > > -} > > -#endif > > - > > #ifdef CONFIG_FLATMEM > > #define pfn_to_nid(pfn) (0) > > #endif > > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > > index 0d012eda1694..1ac775bfc9cf 100644 > > --- a/mm/page_alloc.c > > +++ b/mm/page_alloc.c > > @@ -1504,6 +1504,31 @@ void __free_pages_core(struct page *page, unsigned int order) > > #if defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) || \ > defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) > > This is the upper layer of ifdeffery scope. > > > > static struct mminit_pfnnid_cache early_pfnnid_cache __meminitdata; > > > > +#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID > > Moving __early_pfn_to_nid() here makes the upper layer of ifdeferry > scope a little werid. But seems no better way to optimize it. It gets a bit better after patch 3 :) > Otherwise, this patch looks good to me. > > Reviewed-by: Baoquan He Thanks! > > + > > +/* > > + * Required by SPARSEMEM. Given a PFN, return what node the PFN is on. > > + */ > > +int __meminit __early_pfn_to_nid(unsigned long pfn, > > + struct mminit_pfnnid_cache *state) > > +{ > > + unsigned long start_pfn, end_pfn; > > + int nid; > > + > > + if (state->last_start <= pfn && pfn < state->last_end) > > + return state->last_nid; > > + > > + nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn); > > + if (nid != NUMA_NO_NODE) { > > + state->last_start = start_pfn; > > + state->last_end = end_pfn; > > + state->last_nid = nid; > > + } > > + > > + return nid; > > +} > > +#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */ > > + > > int __meminit early_pfn_to_nid(unsigned long pfn) > > { > > static DEFINE_SPINLOCK(early_pfn_lock); > > @@ -6298,32 +6323,6 @@ void __meminit init_currently_empty_zone(struct zone *zone, > > zone->initialized = 1; > > } > > > > -#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP > > -#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID > > - > > -/* > > - * Required by SPARSEMEM. Given a PFN, return what node the PFN is on. > > - */ > > -int __meminit __early_pfn_to_nid(unsigned long pfn, > > - struct mminit_pfnnid_cache *state) > > -{ > > - unsigned long start_pfn, end_pfn; > > - int nid; > > - > > - if (state->last_start <= pfn && pfn < state->last_end) > > - return state->last_nid; > > - > > - nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn); > > - if (nid != NUMA_NO_NODE) { > > - state->last_start = start_pfn; > > - state->last_end = end_pfn; > > - state->last_nid = nid; > > - } > > - > > - return nid; > > -} > > -#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */ > > - > > /** > > * free_bootmem_with_active_regions - Call memblock_free_early_nid for each active range > > * @nid: The node to free memory on. If MAX_NUMNODES, all nodes are freed. > > -- > > 2.25.1 > > > -- Sincerely yours, Mike.