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=-8.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 5DBA3C433E0 for ; Mon, 6 Jul 2020 13:58:39 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 2996320715 for ; Mon, 6 Jul 2020 13:58:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="bv4eaGQS"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="GLLgnzhJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2996320715 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=pVuNK11s96+2u1pmemgUkFNBL1jmg8mfKp10hwAMz08=; b=bv4eaGQSp/MjcPnaHVzaoaZ75 0vmogtanvBaba0XiOgAcoKk9Ciwju9CYSx3tnZsY3+N2S4Abr94063ds3akIiH9dGOUzFyAU9drOi CYfa5CfFPlsgPkYcAUqKsDtvwNir33ES20ewKNi4mYcJfSSQp5Bwm/uKdZs2q2BaY+ID2H2XRd5j1 /D/QHng8e0jvc9MheGNxBD1shqxatjw3ZVBXnLOY9A8U8aTsJs2iyosXuiIN9RyLwniHpzPJet3yK 9430MbxH9uQfbkxGfAI+/8XXohpktwBcINnsRzM6l0vj+9W+g+pQKNxi683+2sQHGb34xM9T2joxq eOfMhATYw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jsRcO-0000Uq-FD; Mon, 06 Jul 2020 13:57:12 +0000 Received: from us-smtp-1.mimecast.com ([205.139.110.61] helo=us-smtp-delivery-1.mimecast.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jsRcL-0000UI-3p for linux-arm-kernel@lists.infradead.org; Mon, 06 Jul 2020 13:57:10 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1594043826; h=from:from: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:autocrypt:autocrypt; bh=KRTv0folRt/5tw+UDLWBJrPgFbYsVqLGAXYurdQnLA4=; b=GLLgnzhJIs00ffmP5KyE1n1Hb7aWKN+82B2AqJOcZnvdYxZLYZ1IGWF2X4CUgImcmSIzHv GRxLFTuEVCPdt7y8FEQsXMyryU7z45Df+AradRxBtOkLLL5i28eRSAWMFFNnZ9OUpHTYnJ PST1wY2AZ4uGeb1BB5Jn2Xqng5aHTOE= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-186-ueak3Bf9PoC9gZsWgZfO1A-1; Mon, 06 Jul 2020 09:57:05 -0400 X-MC-Unique: ueak3Bf9PoC9gZsWgZfO1A-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 57A5319200C0; Mon, 6 Jul 2020 13:57:03 +0000 (UTC) Received: from [10.36.114.3] (ovpn-114-3.ams2.redhat.com [10.36.114.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id C461F512FE; Mon, 6 Jul 2020 13:56:58 +0000 (UTC) Subject: Re: [PATCH 1/3] arm64/numa: set numa_off to false when numa node is fake To: Justin He , Catalin Marinas , Will Deacon References: <20200706011947.184166-1-justin.he@arm.com> <20200706011947.184166-2-justin.he@arm.com> <5006eb38-a80e-e368-48db-7f497e15c8af@redhat.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; prefer-encrypt=mutual; keydata= mQINBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABtCREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT6JAlgEEwEIAEICGwMFCQlmAYAGCwkIBwMCBhUI AgkKCwQWAgMBAh4BAheAFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl3pImkCGQEACgkQTd4Q 9wD/g1o+VA//SFvIHUAvul05u6wKv/pIR6aICPdpF9EIgEU448g+7FfDgQwcEny1pbEzAmiw zAXIQ9H0NZh96lcq+yDLtONnXk/bEYWHHUA014A1wqcYNRY8RvY1+eVHb0uu0KYQoXkzvu+s Dncuguk470XPnscL27hs8PgOP6QjG4jt75K2LfZ0eAqTOUCZTJxA8A7E9+XTYuU0hs7QVrWJ jQdFxQbRMrYz7uP8KmTK9/Cnvqehgl4EzyRaZppshruKMeyheBgvgJd5On1wWq4ZUV5PFM4x II3QbD3EJfWbaJMR55jI9dMFa+vK7MFz3rhWOkEx/QR959lfdRSTXdxs8V3zDvChcmRVGN8U Vo93d1YNtWnA9w6oCW1dnDZ4kgQZZSBIjp6iHcA08apzh7DPi08jL7M9UQByeYGr8KuR4i6e RZI6xhlZerUScVzn35ONwOC91VdYiQgjemiVLq1WDDZ3B7DIzUZ4RQTOaIWdtXBWb8zWakt/ ztGhsx0e39Gvt3391O1PgcA7ilhvqrBPemJrlb9xSPPRbaNAW39P8ws/UJnzSJqnHMVxbRZC Am4add/SM+OCP0w3xYss1jy9T+XdZa0lhUvJfLy7tNcjVG/sxkBXOaSC24MFPuwnoC9WvCVQ ZBxouph3kqc4Dt5X1EeXVLeba+466P1fe1rC8MbcwDkoUo65Ag0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAGJAiUEGAECAA8FAlXLn5ECGwwFCQlmAYAACgkQTd4Q 9wD/g1qA6w/+M+ggFv+JdVsz5+ZIc6MSyGUozASX+bmIuPeIecc9UsFRatc91LuJCKMkD9Uv GOcWSeFpLrSGRQ1Z7EMzFVU//qVs6uzhsNk0RYMyS0B6oloW3FpyQ+zOVylFWQCzoyyf227y GW8HnXunJSC+4PtlL2AY4yZjAVAPLK2l6mhgClVXTQ/S7cBoTQKP+jvVJOoYkpnFxWE9pn4t H5QIFk7Ip8TKr5k3fXVWk4lnUi9MTF/5L/mWqdyIO1s7cjharQCstfWCzWrVeVctpVoDfJWp 4LwTuQ5yEM2KcPeElLg5fR7WB2zH97oI6/Ko2DlovmfQqXh9xWozQt0iGy5tWzh6I0JrlcxJ ileZWLccC4XKD1037Hy2FLAjzfoWgwBLA6ULu0exOOdIa58H4PsXtkFPrUF980EEibUp0zFz GotRVekFAceUaRvAj7dh76cToeZkfsjAvBVb4COXuhgX6N4pofgNkW2AtgYu1nUsPAo+NftU CxrhjHtLn4QEBpkbErnXQyMjHpIatlYGutVMS91XTQXYydCh5crMPs7hYVsvnmGHIaB9ZMfB njnuI31KBiLUks+paRkHQlFcgS2N3gkRBzH7xSZ+t7Re3jvXdXEzKBbQ+dC3lpJB0wPnyMcX FOTT3aZT7IgePkt5iC/BKBk3hqKteTnJFeVIT7EC+a6YUFg= Organization: Red Hat GmbH Message-ID: Date: Mon, 6 Jul 2020 15:56:57 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200706_095709_262877_7EC938BA X-CRM114-Status: GOOD ( 22.61 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Baoquan He , Kaly Xin , Chuhong Yuan , "linux-kernel@vger.kernel.org" , Mike Rapoport , "linux-mm@kvack.org" , Andrew Morton , "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 06.07.20 14:36, Justin He wrote: > Hi David, thanks for the comments. See my answer please: > >> -----Original Message----- >> From: David Hildenbrand >> Sent: Monday, July 6, 2020 4:03 PM >> To: Justin He ; Catalin Marinas >> ; Will Deacon >> Cc: Andrew Morton ; Mike Rapoport >> ; Baoquan He ; Chuhong Yuan >> ; linux-arm-kernel@lists.infradead.org; linux- >> kernel@vger.kernel.org; linux-mm@kvack.org; Kaly Xin >> Subject: Re: [PATCH 1/3] arm64/numa: set numa_off to false when numa node >> is fake >> >> On 06.07.20 03:19, Jia He wrote: >>> Previously, numa_off is set to true unconditionally in dummy_numa_init(), >>> even if there is a fake numa node. >>> >>> But acpi will translate node id to NUMA_NO_NODE(-1) in >> acpi_map_pxm_to_node() >>> because it regards numa_off as turning off the numa node. >>> >>> Without this patch, pmem can't be probed as a RAM device on arm64 if >> SRAT table >>> isn't present. >>> >>> $ndctl create-namespace -fe namespace0.0 --mode=devdax --map=dev -s 1g - >> a 64K >>> kmem dax0.0: rejecting DAX region [mem 0x240400000-0x2bfffffff] with >> invalid node: -1 >>> kmem: probe of dax0.0 failed with error -22 >>> >>> This fixes it by setting numa_off to false. >>> >>> Signed-off-by: Jia He >>> --- >>> arch/arm64/mm/numa.c | 3 ++- >>> 1 file changed, 2 insertions(+), 1 deletion(-) >>> >>> diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c >>> index aafcee3e3f7e..7689986020d9 100644 >>> --- a/arch/arm64/mm/numa.c >>> +++ b/arch/arm64/mm/numa.c >>> @@ -440,7 +440,8 @@ static int __init dummy_numa_init(void) >>> return ret; >>> } >>> >>> - numa_off = true; >>> + /* force numa_off to be false since we have a fake numa node here >> */ >>> + numa_off = false; >>> return 0; >>> } >>> >>> >> >> What would happen if we use something like this in drivers/dax/kmem.c >> instead: >> >> numa_node = dev_dax->target_node; >> if (numa_node == NUMA_NO_NODE) >> numa_node = memory_add_physaddr_to_nid(kmem_start); >> >> and eventually dropping the pr_warn in >> arm64/memory_add_physaddr_to_nid() ? Would that work? > > Yes, it works. I sent a similar patch [1] before. But seems pmem > maintainer didn't satisfy it. Do you think memory_add_physaddr_to_nid() > is better than numa_mem_id()? Well, it's the somewhat-common way to get a NID for memory hotadd. E.g., - drivers/acpi/acpi_memhotplug.c - drivers/base/memory.c - drivers/hv/hv_balloon.c - drivers/virtio/virtio_mem.c - drivers/xen/balloon.c use it in combination with add_memory_*() Especially, ACPI and virtio-mem use it in case NUMA_NO_NID is detected. -- Thanks, David / dhildenb _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel