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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90B90C3DA4A for ; Fri, 2 Aug 2024 16:44:53 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0414D6B0083; Fri, 2 Aug 2024 12:44:53 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F0B766B0095; Fri, 2 Aug 2024 12:44:52 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D5EE86B0096; Fri, 2 Aug 2024 12:44:52 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id B3A466B0083 for ; Fri, 2 Aug 2024 12:44:52 -0400 (EDT) Received: from smtpin28.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 77F081A0CA0 for ; Fri, 2 Aug 2024 16:44:52 +0000 (UTC) X-FDA: 82407879624.28.BB0E89A Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by imf28.hostedemail.com (Postfix) with ESMTP id 1A0F4C0028 for ; Fri, 2 Aug 2024 16:44:48 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=none; spf=pass (imf28.hostedemail.com: domain of jonathan.cameron@huawei.com designates 185.176.79.56 as permitted sender) smtp.mailfrom=jonathan.cameron@huawei.com; dmarc=pass (policy=quarantine) header.from=huawei.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1722617032; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=79ebLDK6W1+KYN8aVydZ8lj+2uE/Xw8LsmVSJFNf+oA=; b=bG9clcbXBledRGnuhsaDFoUgJbQ0iEDAr74WA6zbFIpmlF0zMPbsMs674fC7EnjkBaPepz ZD+FT9cc1PBr9FGpk5IACfzPMAxc0t5looxmkaKGyi6rUCv0o7QZpO3rp9Tq+Ji/3cMLSF yxtnw9K6sPVUnNQc2c7W+TgbenmYBbg= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1722617032; a=rsa-sha256; cv=none; b=5S8qraSXiIurB6ciLzDM+fKSuTsAKl86VwUuy1y9MuyHHzRAesfd5WeWxrPpHxH3rpsrCN xGYPMVkW+Y8QPAKIHc6ES9NG0bdV/0dh8OV1KLjL8fonvS+ch923i0ohGolhGgiJuavpyL RgJz7n8qkfoTzgVGrHc2RERLZR6REGI= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=none; spf=pass (imf28.hostedemail.com: domain of jonathan.cameron@huawei.com designates 185.176.79.56 as permitted sender) smtp.mailfrom=jonathan.cameron@huawei.com; dmarc=pass (policy=quarantine) header.from=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.231]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4WbBTD2kfFz6K5YZ; Sat, 3 Aug 2024 00:42:40 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (unknown [7.191.163.240]) by mail.maildlp.com (Postfix) with ESMTPS id A6A811404F5; Sat, 3 Aug 2024 00:44:44 +0800 (CST) Received: from localhost (10.203.177.66) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 2 Aug 2024 17:44:43 +0100 Date: Fri, 2 Aug 2024 17:44:43 +0100 From: Jonathan Cameron To: Mike Rapoport CC: , Alexander Gordeev , Andreas Larsson , "Andrew Morton" , Arnd Bergmann , "Borislav Petkov" , Catalin Marinas , Christophe Leroy , Dan Williams , Dave Hansen , David Hildenbrand , "David S. Miller" , Davidlohr Bueso , "Greg Kroah-Hartman" , Heiko Carstens , Huacai Chen , Ingo Molnar , Jiaxun Yang , "John Paul Adrian Glaubitz" , Jonathan Corbet , Michael Ellerman , Palmer Dabbelt , "Rafael J. Wysocki" , Rob Herring , Samuel Holland , Thomas Bogendoerfer , Thomas Gleixner , "Vasily Gorbik" , Will Deacon , Zi Yan , , , , , , , , , , , , , , , , Subject: Re: [PATCH v3 00/26] mm: introduce numa_memblks Message-ID: <20240802174443.0000710c@Huawei.com> In-Reply-To: <20240801060826.559858-1-rppt@kernel.org> References: <20240801060826.559858-1-rppt@kernel.org> Organization: Huawei Technologies Research and Development (UK) Ltd. X-Mailer: Claws Mail 4.1.0 (GTK 3.24.33; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.203.177.66] X-ClientProxiedBy: lhrpeml500004.china.huawei.com (7.191.163.9) To lhrpeml500005.china.huawei.com (7.191.163.240) X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 1A0F4C0028 X-Stat-Signature: zdkmahamg8hpnhxzuhsj9zahoig79h8a X-HE-Tag: 1722617088-268805 X-HE-Meta: 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 D+T7PlED i7+GxpnA100P95S2dD+s4FT+yA0Ab8VEDi1wl7fRA5xKmHhDorRu4J4xYNiGFo0E1Pu6G3E9MhhlRPEH2EinXOHZJIg/wWNsFwlGq0WCODVyGNntcsCnr/pS2IrpMTTzOilHu4ALzfFD1Ap+RvPqdqpDq5XCiPHt4KXS+rTtjKWK4Oy8l1+NK1cMJ9rbdY9nc6vf2xyjyerJUh6M4in9zQ3ZEb/V1Jox9B46bcmLQVABRM4kH3MGshQyWZMRdFbEALvA92zs8rmmTcyx+pdiueNBASPfK4hXCUP5a3kxCZxisF/Kud4bS8V2mlQzbKOffbJps1YjnX3S1gdJFY0E9R5MJzOjOy5vMYxNB9XJJx+3VMi7T6UR0B/WZIw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 1 Aug 2024 09:08:00 +0300 Mike Rapoport wrote: > From: "Mike Rapoport (Microsoft)" > > Hi, > > Following the discussion about handling of CXL fixed memory windows on > arm64 [1] I decided to bite the bullet and move numa_memblks from x86 to > the generic code so they will be available on arm64/riscv and maybe on > loongarch sometime later. > > While it could be possible to use memblock to describe CXL memory windows, > it currently lacks notion of unpopulated memory ranges and numa_memblks > does implement this. > > Another reason to make numa_memblks generic is that both arch_numa (arm64 > and riscv) and loongarch use trimmed copy of x86 code although there is no > fundamental reason why the same code cannot be used on all these platforms. > Having numa_memblks in mm/ will make it's interaction with ACPI and FDT > more consistent and I believe will reduce maintenance burden. > > And with generic numa_memblks it is (almost) straightforward to enable NUMA > emulation on arm64 and riscv. Tested-by: Jonathan Cameron #arm64 + CXL via QEMU With that one fix in patch 7. Feel free to figure out which patches actually got tested by that (or tag them all - I'll pretend I tested ip27 :) Jonathan