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 57763C369DC for ; Mon, 28 Apr 2025 20:56:10 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 81DC66B002D; Mon, 28 Apr 2025 16:56:09 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 7A67E6B0031; Mon, 28 Apr 2025 16:56:09 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5D3116B007B; Mon, 28 Apr 2025 16:56:09 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 39B356B002D for ; Mon, 28 Apr 2025 16:56:09 -0400 (EDT) Received: from smtpin27.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 4114281517 for ; Mon, 28 Apr 2025 20:56:09 +0000 (UTC) X-FDA: 83384660058.27.433EAD2 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf27.hostedemail.com (Postfix) with ESMTP id B219E40008 for ; Mon, 28 Apr 2025 20:56:06 +0000 (UTC) Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=ixYYcvAx; dmarc=pass (policy=quarantine) header.from=redhat.com; spf=pass (imf27.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=1745873766; a=rsa-sha256; cv=none; b=b0M7lAfB1hnNONlucAhC/OL92LfpwziSrY8ZqGugSUsNrz/hiD5w5huoQKVwPIeeAlh/yo tQxFIPgTFSCLYffGwqgRkZeJKOdEw2zGNjz1a2uTRnboaL1EJktegIiJGnsOPste8rqWPo PsN4KefosdRdJiUb0WZUoENbphHmwsg= ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=ixYYcvAx; dmarc=pass (policy=quarantine) header.from=redhat.com; spf=pass (imf27.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=1745873766; 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=fusCN2BDqL9G0FTng4EZBuLz5WER2kvvMnmBxajcL0Y=; b=6ByFwG8MvGmCsa+oZ8bam5bIOII6PeuzUnoI4zQVx9qDOPXBRI8wekuEZ+ioLkY9QtX9at rw8vL6v2euCGMloIdVVYH9s/wmC1lEIT4yTA9fRfuu3LvfBGQV4w3QwfaSI28fIEwYELsf +iJlFhN77OVR5tXhXM9rj2Gwy8zHT28= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1745873766; 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=fusCN2BDqL9G0FTng4EZBuLz5WER2kvvMnmBxajcL0Y=; b=ixYYcvAxCIoETQklLYqvozO500qXbX+ZSyTfRReUJsE9ZX86QFn40z0n1KJJz8TtJbtlLf +p/o4RiW3iCesgdS3E9lIpG/58d3dBr1F7RCd+nO2XzXPxKgrMbOKTLp/OCjmmQZSg4AbA jpIrsnCUA84i3dGgHHDoBqlIsciUGZs= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-516-EqCCvFlPNiqC0j9bhRz6CQ-1; Mon, 28 Apr 2025 16:56:04 -0400 X-MC-Unique: EqCCvFlPNiqC0j9bhRz6CQ-1 X-Mimecast-MFC-AGG-ID: EqCCvFlPNiqC0j9bhRz6CQ_1745873764 Received: by mail-wm1-f72.google.com with SMTP id 5b1f17b1804b1-440a4e2bad7so13635525e9.0 for ; Mon, 28 Apr 2025 13:56:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745873763; x=1746478563; 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=fusCN2BDqL9G0FTng4EZBuLz5WER2kvvMnmBxajcL0Y=; b=fh34JPZAUeM6fDVM8ggU9a3pWthXaLs3++uP+yRV0snkvjwTQmzvK3WZyVHalmfo0r Sc2jzrP6Tx34hNliUc6HEX6SZIcEARdkdzwL3MGCcVlJOXNAnfaTjatDb3tIxpvSCS0/ 3t9r3JDNeD16JC54uQS5t+hBKyRB+EL2Bif/tgpIjdwM5V3+R7cVJs99Zabso9m+YVo1 bN4F5yXZevN3ZCHA6yR4zZETeWc+gih2UyuDpvjc/F5AVGxE0z8zD6DCKzm8pnbSO/gw uQExJEON3S/T2RG3na/u7ofryQYROtRHSksUEoph7BRyOS6UhcJsjZ/QNom94cPvptiy FG0w== X-Forwarded-Encrypted: i=1; AJvYcCXZDfTCEKKRfnV+mJZvkyzW4KELB9Ado9Kx66y7qlkCkxzE5c91NEYVjSyP20Ji8PrlUQN8jbxV8w==@kvack.org X-Gm-Message-State: AOJu0Yw6qMY+erNu7Y+SBp41AdfSVv8ayUOSEFmFQEif2P6DhRPl+27p Ke3uQA50Xie3wMxl9/SXemEDhPHiSoOZfxhuzuwY9gr4xhRJXziUjUox7fe5AYUFhNIrMZTquul 2uvGZv8HsmWnVWMD7ukc6xytAmITPV9Mi7/iFZV1E33N0xM06 X-Gm-Gg: ASbGnctFEkVY06wXYIteJNH4hOvbjTG/Zhzw+4llvkWwkMEO7ByyjkAjs1b6DFcnPb9 8yJTUR4c4PdcHWZRywbg0Dnjr06bajBVQbF9HNL1+qpHoZAsyXRU88ywJBBApleMmEMRSJ+tzMw 2GyguUU+NCL1OOsrggUIWfdjUGq2P/MHXUJqhzx56zRGSwSJV90eky2wmriITZo07Zt6a5TB7p/ FqyjZQsgJ4nAOagFI89Stzb+0p72yvH1lAj2FfqSPPhGdmjipRBuxO+kMi2JPz1n13CImTUnN4k xxa5b59oX/z+dpb9moYvGGgZuUlJvOWfq/0NDYu3ily0pb1eZS0N5WuG0qgx2jMcuA2U/4c8UHm 2xfbwTrLbQJ5A0xGTMdsEs0ioQQbGkunLhBcxltA= X-Received: by 2002:a05:600c:1e02:b0:439:8878:5029 with SMTP id 5b1f17b1804b1-441acadd86bmr4971755e9.2.1745873763682; Mon, 28 Apr 2025 13:56:03 -0700 (PDT) X-Google-Smtp-Source: AGHT+IG7hxCQCaCA0FXjsYvTca7j1SOBJfNlJ9xkKvPBHYLO9allwwgLpaAQ1seUp2y9Eka6T17/kg== X-Received: by 2002:a05:600c:1e02:b0:439:8878:5029 with SMTP id 5b1f17b1804b1-441acadd86bmr4971705e9.2.1745873763338; Mon, 28 Apr 2025 13:56:03 -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 5b1f17b1804b1-4409d2ac5a9sm167997525e9.23.2025.04.28.13.56.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Apr 2025 13:56:02 -0700 (PDT) Message-ID: <3d0b8c8b-b707-4a49-99f9-09aadfc27432@redhat.com> Date: Mon, 28 Apr 2025 22:56:01 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC] pin_user_pages_fast failure count increased To: John Hubbard , Jaewon Kim , zhaoyang.huang@unisoc.com Cc: surenb@google.com, linux-mm@kvack.org References: 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: PzAGN-GwWLVEx6nanj7HEZKo0n_67-PL7TAZm36OQZg_1745873764 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: B219E40008 X-Stat-Signature: mzbf953zbof5mx59gg1zw1by8h8t11m4 X-Rspam-User: X-HE-Tag: 1745873766-364061 X-HE-Meta: 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 mPWRbsYY 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 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 22:14, John Hubbard wrote: > On 4/28/25 8:17 AM, Jaewon Kim wrote: >> Hi >> >> If pin_user_pages_fast does not pin all the requested number of pages, >> then drivers calling to pin_user_pages_fast should retry until the gup >> pins all? >> > > Approaches vary, for handling partial success of pin_user_pages(). > > * Many drivers unpin everything and either bail out entirely, or retry > pinning the entire original range. Hm, unpinning + trying to repin the entire range can easily result in an endless loop on persistent errors IIRC? -- Cheers, David / dhildenb