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 BAB64C369D5 for ; Mon, 28 Apr 2025 20:20:05 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4F24C6B0085; Mon, 28 Apr 2025 16:20:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4A10F6B0088; Mon, 28 Apr 2025 16:20:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 319BD6B0089; Mon, 28 Apr 2025 16:20:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 1239A6B0085 for ; Mon, 28 Apr 2025 16:20:03 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id CB15DC7B36 for ; Mon, 28 Apr 2025 20:20:04 +0000 (UTC) X-FDA: 83384569128.10.E803D0C Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf04.hostedemail.com (Postfix) with ESMTP id 7245D4000F for ; Mon, 28 Apr 2025 20:20:01 +0000 (UTC) Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=KmEzxguN; dmarc=pass (policy=quarantine) header.from=redhat.com; spf=pass (imf04.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1745871601; a=rsa-sha256; cv=none; b=POHVl6Fz0VTpNxbCm2cXn8wq3asnA9cU8pbUvyoKl/0uff4XFXYuFelca2pdc+9PLxxlJr b0JvMR5uQUXECzHzLycuDxy4eHHDlLGE2uRMnV4SUNG6h7BaLxMxOoTCnWdcTpPdHGp8vt 0ZIJG33jS2KVHMnBuYQJPB+8iMRfnRU= ARC-Authentication-Results: i=1; imf04.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=KmEzxguN; dmarc=pass (policy=quarantine) header.from=redhat.com; spf=pass (imf04.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1745871601; 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:dkim-signature; bh=JvsTuXjn7VdpRaYIi2+HwQJx87fn25wHprZJ8iJ1PNg=; b=ta5KpzpQ0rkrn/QOIoCBwjXFZdyK244kRuRfl6Eyx9PhwUOFvryxMXAOA6xMkxjysQRJGH dEdj4/QNKkoclAzh2XgWBirgwUfARcdRhy+cue2YAGash3Usw57918YEhdNUAlRbzAJEjm YZiV9bHTfkoT3JsZPcXS/Usn7zjNJVQ= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1745871600; 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=JvsTuXjn7VdpRaYIi2+HwQJx87fn25wHprZJ8iJ1PNg=; b=KmEzxguNhJ5LyIPKtF5o3fkj1xUccz/qwsJUsYLgPgZYbjYz3iXrfOaZPU6LLwI2x8B01l clnTiV/LLmmEQc8x47X6DAQhqZllOg5vnrfjcF1A+bkSu7XZVCt7d2d9IbrlTKBS31Ht4R RTuIUL9ZVU516SW8j8hANCfaPHawvHU= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-108-D2qvYSsKMSShDYwg35FMPQ-1; Mon, 28 Apr 2025 16:19:59 -0400 X-MC-Unique: D2qvYSsKMSShDYwg35FMPQ-1 X-Mimecast-MFC-AGG-ID: D2qvYSsKMSShDYwg35FMPQ_1745871598 Received: by mail-wm1-f70.google.com with SMTP id 5b1f17b1804b1-43941ad86d4so22464325e9.2 for ; Mon, 28 Apr 2025 13:19:58 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745871598; x=1746476398; h=content-transfer-encoding:in-reply-to:organization: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=JvsTuXjn7VdpRaYIi2+HwQJx87fn25wHprZJ8iJ1PNg=; b=t10FlTrnEhQ2l7lKFztaLdvRB3lMVfaoFhxAQtVybA0qE/yz/QGDb01pMN+RRSERlb qDOIfDE+tROHcBAZwmDWtKIyFi6xuwbbbO/ggbt1lifRDOeYIVMYbX+CTIoL4Pbe1mxm AakIG2SjUWjsjir5KVDOaaMxskY45ZF7IupIQ4ziDLT9TNSTuU4gH+Nn7oVnLqbv6wGE GiuGP662PK8rhsDfQsz3i0NGlvJVbjIMIZ0G59A5gvwNwfbyVbkaxwzHMJC22RbbP7i2 PkDcY8y2RlNnO0ubtvG/1TK/SHTQsFgltvtDDG6ILJl8ynoLwI1E0PhadVY0tbZ8oo+S iQLQ== X-Forwarded-Encrypted: i=1; AJvYcCWQwJhrGw99xKKX7CALbV8R63my/2X34xhM3xaCMkpeVbHhu06lmCJMWq7/9DwtTpa1cbEezloWlQ==@kvack.org X-Gm-Message-State: AOJu0Yzgj9NAxbeh55ga3PKk1emznFByaU6Xkck34acOLRUdp3ms1jSI S7tPzygdK2v28ddosggFPCttmMXm0sJpFyHb4T68GOD5JR5x0eApeBfgJAHDtY/w/vZNZnx9Htu dBa02NrFSMXGLSUbpXW8wO13AnWPSGwUquwEatjwFNhD0exEI X-Gm-Gg: ASbGncsY6HAWJtnfPf1InHKi1HJteHv7rPjMCkTctLa8WcCaQnmj2iyOVTQcsVm8gkP nOWRMVB57ycCvBSNy1veGYmie5clPeP6CGBqoMIY/65nnL9nasZLt1cbQNpK3vlrarNDkipce3D 2uY2CTH6Tq66JoYoWRdGdMo6zKMIKwivo1dF+2dXTwgUjLZls/8zMuChaiUhXEmFjmzlYHyGUhv kqDvJOTlzJ5DBRx/TrFEBQceFJwCCkOQV8hpAgEg9xnrXKLDBi6OaIOmnngLdHA8XH+Rpy4FEP/ TfmRwp86EZ+5mkb5i3XjUgtiNgOWd8FKwQn+MFS/xfZ7ATHueXgMDC8dvKpiMpr6EDkIwJ8QYt6 3V72NRs+iQMhJiM0CZnzvkGErUtc1pGldTXLVcBI= X-Received: by 2002:a05:600c:1986:b0:440:68db:a045 with SMTP id 5b1f17b1804b1-441ad4e5d79mr688145e9.26.1745871597879; Mon, 28 Apr 2025 13:19:57 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGA72cAXrv/TlGoL3TY3i3ocOtaVRgrBh4l+fWWaE1+/hCYDSwBWzOpf+TvqnjHxephoKvbaw== X-Received: by 2002:a05:600c:1986:b0:440:68db:a045 with SMTP id 5b1f17b1804b1-441ad4e5d79mr687815e9.26.1745871597451; Mon, 28 Apr 2025 13:19:57 -0700 (PDT) Received: from ?IPV6:2003:cb:c72f:ea00:2f00:e7e5:8875:a0ea? (p200300cbc72fea002f00e7e58875a0ea.dip0.t-ipconnect.de. [2003:cb:c72f:ea00:2f00:e7e5:8875:a0ea]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-440a538747esm133007735e9.35.2025.04.28.13.19.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Apr 2025 13:19:56 -0700 (PDT) Message-ID: Date: Mon, 28 Apr 2025 22:19:55 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 05/11] mm: convert VM_PFNMAP tracking to pfnmap_track() + pfnmap_untrack() To: Lorenzo Stoakes Cc: Peter Xu , linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-trace-kernel@vger.kernel.org, Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Simona Vetter , Andrew Morton , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , "Liam R. Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato References: <20250425081715.1341199-1-david@redhat.com> <20250425081715.1341199-6-david@redhat.com> <7a26e29c-d889-450a-a5e1-ce671f09e4c8@redhat.com> <884fab29-e16a-4663-8e33-885bc70ca2f7@redhat.com> From: David Hildenbrand 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 ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz 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+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: NmKa3TvqxK5WPinaUn-dLUrAhFTjwXK_dZgnyZChH_Y_1745871598 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 7245D4000F X-Stat-Signature: bt65z59cxa6uk59z5dabifpmuywqwsqp X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1745871601-873686 X-HE-Meta: U2FsdGVkX19wrqEnPhp7Rr82Wqh6qXFIkPJS2+SLKZbM0fPcLJD1/JU7bFxnRIOVqGnEzTb8a6cmKySZnnufaSzulu3qItijiEVgPLO2IuqilmS82al5jlBEtUBwWkUze0zMvIoj4D5PKtEAgFKmgPxb89z6/zYw24EMPsBfEQOmz4CATmLlkiMxhH3vvT+hkjz39mUgjehm/lyoR7RUup+5KBR+91VjGfvAK0OCwLU9QthLXiPzCt1mzSArLE7pXWGcYZNDLPFJj/MEE/vH3/ELmCGuujFCpsYqsVfFt75Pel7FB2ad/LCNzZalC6PGfQlYHa2HRHoKP2EH+/oNyrZSK6JNK9l415BuK27DRLB4VVwuPCtFzvPrBAIfByP432zbN3Pa7h6yhgYLNRcoOKTJzQJ6OrcgKrBpAwyVmrj8QNAwlnPgzoAI0JcAUPCylXGLIxaf+DHigq/GrV6AQv3n3QvnSt8y3+LorGz5bzr8aAPlvDXplQVBbW6mqJ+mkJ6nOze8pkcZcs9+g++wyYzOxlg1vKg3iIC1bpeLAbPYiIc7vVDCzOzpkNg6xyU92/rWGRYhewIPAm+5J7Vkt9uKJGRAnIi/doDkWZ1ue2FCgFN0Bp66J0spyaTjnNEQAGwMB1Bb+9+HEVyWBuLdhx2+Msu4vuMpYP6ccSpPIefRQjexbCBKa1YFOXmCdE3nAtLriheNPi13OyuZASzygUxccVYnUpxX/iMUYQ0pOwGzGBYXDMSwPkuVmXdVUyFj6Het523b6wyFjWG4oxdlvmUp5LPfXhzyBocsbLx1rkYp0qyq38gUHSy3//3JqjNHiMXzQ0JhHSIMeCUL64kYgf4r15xhH4SX4xjDc6mJpEKD+hayhHdg9aeiWAG3S7ZdZ2b5ROAi6DAQwu6w43WmxJQTMIX/nPIE+vwV9kln43xR0LAb9gcjiIqCran3v1xXD0J+TwRIxrebFLh23J9 aJKW6Law oG8xnFfskm35Qj/XuAFwHHQVz04U7k24VFWc17DTkyos+OPbzt7WuRqnFGeRYWO3/1iIuU1gWy6+a/wjnhsHgOeXLrixLLNxjkUFadE7RjOWeDAjH99eCx/wkDTCNcHdDNoFBtdTXaSqL5o+g12hRYFoauTRbty5t09Vy9o3Lm/ArbByNdJUkSmu6NkEN72GX1GpWcfoRB2WAs1qY1H6L9rQwyDe18cU93tDVLga8w1h69HzrPZkBw5xe9ebPHJZHQQI69IsOrVkSFv4lTwObkuTTKvpoK0jm26BDLjY417Q7vfgIRjRDHRkwuXa0S49GIPWIjFA8RJghuMBmxbL+UUlCnQk+UrIH4IaIT5M3IJ/HlLiDIcnXB4+pDtewwk7PnqUBVlYwsP+iZ6opiAGjsaMqFhGJ8QXgV/GJsEwVffOkdfMAH1zpq6Qj/2shMdsAxdDdVN5CoZPEu+4= 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 28.04.25 21:37, Lorenzo Stoakes wrote: > On Mon, Apr 28, 2025 at 07:23:18PM +0200, David Hildenbrand wrote: >> On 28.04.25 18:24, Peter Xu wrote: >>> On Mon, Apr 28, 2025 at 06:16:21PM +0200, David Hildenbrand wrote: >>>>> Probably due to what config you have. E.g., when I'm looking mine it's >>>>> much bigger and already consuming 256B, but it's because I enabled more >>>>> things (userfaultfd, lockdep, etc.). >>>> >>>> Note that I enabled everything that you would expect on a production system >>>> (incld. userfaultfd, mempolicy, per-vma locks), so I didn't enable lockep. >>> >>> I still doubt whether you at least enabled userfaultfd, e.g., your previous >>> paste has: >>> >>> struct vm_userfaultfd_ctx vm_userfaultfd_ctx; /* 176 0 */ >>> >>> Not something that matters.. but just in case you didn't use the expected >>> config file you wanted to use.. >> >> You're absolutely right. I only briefly rechecked for this purpose here on >> my notebook, and only looked for the existence of members, not expecting >> that we have confusing stuff like vm_userfaultfd_ctx. >> >> I checked again and the size stays at 192 with allyesconfig and then >> disabling debug options. > > I think a reasonable case is everything on, except CONFIG_DEBUG_LOCK_ALLOC and I > don't care about nommu. > > So: > > CONFIG_PER_VMA_LOCK > CONFIG_SWAP > CONFIG_MMU (exclude the nommu vm_region field) > CONFIG_NUMA > CONFIG_NUMA_BALANCING > CONFIG_PER_VMA_LOCK > CONFIG_ANON_VMA_NAME > __HAVE_PFNMAP_TRACKING Yes. And our ugly friend CONFIG_USERFAULTFD that is struct vm_userfaultfd_ctx { struct userfaultfd_ctx *ctx; }; #else /* CONFIG_USERFAULTFD */ #define NULL_VM_UFFD_CTX ((struct vm_userfaultfd_ctx) {}) struct vm_userfaultfd_ctx {}; #endif /* CONFIG_USERFAULTFD */ (yes, you made the same mistake as I made when skimming if everything relevant was enabled) > > So to be clear - allyesconfig w/o debug gives us this yes? And we don't add a > cache line? In which case all good :) Looks like it! -- Cheers, David / dhildenb