From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 66DF020DD48 for ; Mon, 1 Sep 2025 10:02:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756720926; cv=none; b=VsD/pEq6kjPYRcvVIZC06O+7r++h8aF/8y8uMCzvQleeDB387g6cPH3IDq9boUkQTL7uUsdi6jJx6PYUuzj1Yk3w4MEufWf8FO/q7Vp10XxXuhbQCGLOAvPRxPzhGR4iLntKcwLdocnFO3uyk/2oiwFVe7l1cYVyaNrjQgBk8JE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756720926; c=relaxed/simple; bh=ypTD0sEZG5IOONmhSh4yZK8w8GcKNQIdnI9zf9EhGuE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=IZf+1j14hKCRyyBJ6aGqZ529BkCJrLHyhSTh0Wj+rPowS8b0Rg4sL9kpZmueERs5wJPc8y92ajpzAFJhBY3UyO9NuHMVr43sr+Zv+nv8U427i+KNjGPOlaetcvdYROAm8Dy+0iyeO1jeixJ+KGoPHKTTTDnnyvPiInM493+4/K4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=CQix3hq0; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="CQix3hq0" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1756720923; 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=+lQeSnVszPSSY9ZXSFHEL5gERJYR6xjSMj4HUufxrw4=; b=CQix3hq00bRBN/IAtV2Cr9gNpZENe+1tROP+kSGL58N0dnlhFsldM187IW0CtjcPWtx1Vg PSnbTzJY4ClUpo6rOT298GBiBNxn6jKvcrxSDwmAcCEN580wH0S9i35dWGfBX2q5FL6Iib pPI4v+7/tL5l2fBHBiYRjNzS2/9NFNs= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-649-xKBH0lf9MXKXHKfVybGEbQ-1; Mon, 01 Sep 2025 06:02:02 -0400 X-MC-Unique: xKBH0lf9MXKXHKfVybGEbQ-1 X-Mimecast-MFC-AGG-ID: xKBH0lf9MXKXHKfVybGEbQ_1756720921 Received: by mail-wr1-f72.google.com with SMTP id ffacd0b85a97d-3d2edf6af18so761534f8f.1 for ; Mon, 01 Sep 2025 03:02:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756720921; x=1757325721; h=content-transfer-encoding:in-reply-to:autocrypt:content-language :from:references:cc:to:subject:user-agent:mime-version:date :message-id:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=+lQeSnVszPSSY9ZXSFHEL5gERJYR6xjSMj4HUufxrw4=; b=OGsVeetcTvXGddDek55cBW67Sp5L5QnDcfUFTaLT6IEB94usJAkRORstDfZHAsEYLi LoW+SZPrv66UuPEj/yeNdVCS2TqvrHN60VZ3n0p0pV35kPgSXUSLlWHUqjJn/riJ8qhw HByrGf26eYgnKyf36wJQrPVedWJE4FX6i1XTbPDHE1RkLjUXU186PV+IU3scX4KGaTyR 1iWWinJto67wszFIgJOvWCSiVoTPvjrmpltJx7gGLKzrVK0ognnCpUz1UJADevhTug3H lRsX0pKBTSSDERm2TAMGfkZ+P+WfdK21F6j2I/d90mPARw0BvKGAWAwhm2EdbL6bYDuf fpDg== X-Forwarded-Encrypted: i=1; AJvYcCWz06nIh0MkYTkVLtUW77J7Abe/eAxQuO1ddMHY5/a64Pj8FNIeDrNhUhRq7tg/6n8vuesJM//YS0+U@vger.kernel.org X-Gm-Message-State: AOJu0YzZHjKXk+aNROX2P7uv1IDRFdbZB7V+I2koHny3vizDTOuEpGiC Jh5S/b7Vd3NIpiKFQca4HggkYDWJzI9o2hTVcRY44f+URvD4FqhLPlnlM2sQGdCYi64GvZ7KoKD 9CwUa4g1TIOKNa+AlywKO7cxvXKpIq9sqoo8gm3TXo9/4JaPAv2UXl8lxbMMBJ28= X-Gm-Gg: ASbGncuczL21WcPq4ezxRuoyIBcjdKvtpHKp2DN03hSV3LJIu0IF4qLvTB7p9QB55QB /zElkKwUa6xkUMcXNcEX+lMPnevOPcS87UoC2MEy471VwfEpdNsPMPkALExoi6BXJ4gs6R1NDpI Jp96w2gWQSy0PEw3oGXzB1IQWt+bjzOwJpC297sqUHgKvv3t8U2YdFJjM+M6aZVi+T3YUpoVxos HbWWZOCbAQI+aDPm6uldxZEhGE+4eXfWqZFELmSHscL7trcMz6Fc0G1767YGYox7DvOkocNzJDy GWm0Ek985aDDPlwB1ObEQvYIf10JnxXmG117/WKC/yIqttE1Lfhfy3aJGGhNZpPMobZw/Wa6FzS Yq95/hykkcTTdLIGw+PMU9ZKBMRo/JJYiCHFmCGmKm6t6cUq9y5xInMyQsepr6Gf2p5w= X-Received: by 2002:a5d:64cd:0:b0:3d1:abf7:e1c8 with SMTP id ffacd0b85a97d-3d1d98d60e1mr4874725f8f.0.1756720920964; Mon, 01 Sep 2025 03:02:00 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGvPsDFpHZYqBUf8mT2gRUFJpfAuTdUtgOPMP4pMlCUZ06zRhnpYdXw7CHR6fjLFikWold/+w== X-Received: by 2002:a5d:64cd:0:b0:3d1:abf7:e1c8 with SMTP id ffacd0b85a97d-3d1d98d60e1mr4874687f8f.0.1756720920452; Mon, 01 Sep 2025 03:02:00 -0700 (PDT) Received: from ?IPV6:2003:d8:2f37:2b00:948c:dd9f:29c8:73f4? (p200300d82f372b00948cdd9f29c873f4.dip0.t-ipconnect.de. [2003:d8:2f37:2b00:948c:dd9f:29c8:73f4]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3cf275d2717sm14699314f8f.15.2025.09.01.03.01.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 01 Sep 2025 03:01:59 -0700 (PDT) Message-ID: <7e1f4f64-dfc4-4366-8e01-0891b2d4d2b4@redhat.com> Date: Mon, 1 Sep 2025 12:01:58 +0200 Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC][PATCH v2 22/29] mm/numa: Register information into Kmemdump To: Eugen Hristev , Michal Hocko Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, tglx@linutronix.de, andersson@kernel.org, pmladek@suse.com, linux-arm-kernel@lists.infradead.org, linux-hardening@vger.kernel.org, corbet@lwn.net, mojha@qti.qualcomm.com, rostedt@goodmis.org, jonechou@google.com, tudor.ambarus@linaro.org, Christoph Hellwig , Sergey Senozhatsky References: <20250724135512.518487-1-eugen.hristev@linaro.org> <751514db-9e03-4cf3-bd3e-124b201bdb94@redhat.com> <23e7ec80-622e-4d33-a766-312c1213e56b@redhat.com> <77d17dbf-1609-41b1-9244-488d2ce75b33@redhat.com> <9f13df6f-3b76-4d02-aa74-40b913f37a8a@redhat.com> <64a93c4a-5619-4208-9e9f-83848206d42b@linaro.org> <01c67173-818c-48cf-8515-060751074c37@linaro.org> <1b52419c-101b-487e-a961-97bd405c5c33@linaro.org> <99d2cc96-03ea-4026-883e-1ee083a96c39@redhat.com> <98afe1bd-99d2-4b5d-866a-e9541390fab4@linaro.org> <40e802eb-3764-47af-8b4f-9f7c8b5b60c1@linaro.org> From: David Hildenbrand Content-Language: en-US Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <40e802eb-3764-47af-8b4f-9f7c8b5b60c1@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit >>> What do you think ? >> >> Looks a bit over-engineered, and will require us to import a header >> (likely kmemdump.h) in these files, which I don't really enjoy. >> >> I would start simple, without any such macro-magic. It's a very simple >> function after all, and likely you won't end up having many of these? >> > > Thanks David, I will do it as you suggested and see what comes out of it. > > I have one side question you might know much better to answer: > As we have a start and a size for each region, this start is a virtual > address. The firmware/coprocessor that reads the memory and dumps it, > requires physical addresses. Right. I was asking myself the same question while reviewing: should we directly export physical ranges here instead of virtual ones. I guess virtual ones is ok. What do you suggest to use to retrieve that > address ? virt_to_phys might be problematic, __pa or __pa_symbol? or > better lm_alias ? All areas should either come from memblock or be global variables, right? IIRC, virt_to_phys() should work for these. Did you run into any problems with them or why do you think virt_to_phys could be problematic? -- Cheers David / dhildenb