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 AE3A9C3DA4B for ; Wed, 17 Jul 2024 11:01:07 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4869F6B00A1; Wed, 17 Jul 2024 07:01:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 436D46B00A2; Wed, 17 Jul 2024 07:01:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2B05F6B00A3; Wed, 17 Jul 2024 07:01:07 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 04A796B00A1 for ; Wed, 17 Jul 2024 07:01:06 -0400 (EDT) Received: from smtpin25.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 7D88EA4FBE for ; Wed, 17 Jul 2024 11:01:06 +0000 (UTC) X-FDA: 82348952532.25.45E3D28 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf22.hostedemail.com (Postfix) with ESMTP id 0DED5C0026 for ; Wed, 17 Jul 2024 11:01:03 +0000 (UTC) Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=UjtEnEAZ; spf=pass (imf22.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1721214024; 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=3dokGBRJNRPX4aDNhf96lE0TemV8Sinj+IipwlZ/PiA=; b=74Dbrr4hgo2xTsEpyJWMBTkgnTJbg6wxpR57PiH6uZ5eEevZMMAGDza997NLXARlDFIeSv 9KeliXEjouuSNu6IUOZNKY73no+UypXSTPW4ihAyyLwa1E/h94Twb/MyRVubgOd8pwvrDV W4RxGFbs3kcmEcZJif3c/nzSXsVJ1Rs= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1721214024; a=rsa-sha256; cv=none; b=nCndEYIAh0jf04OKAfAsvgVmbHG+8zbVwx7GYeP39p5PP3i5+/h+fRJje+EwNSvent0Nby wt7fCGIzIBjNxy8FlABMFrS1GSbHaQY27Gm1CpGv2/AgCwmMnwueOr30V92Gy1zwXkEjq+ jaYMiRZ7DXf96yTCNbqf5pGRwyuRbdo= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=UjtEnEAZ; spf=pass (imf22.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1721214063; 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=3dokGBRJNRPX4aDNhf96lE0TemV8Sinj+IipwlZ/PiA=; b=UjtEnEAZcsV2/y4rwXlMlowTc7q1ptcWXufr3Neq33zB/G2CuvCjUoauN36BnCNvDH7rqe scGuSo3m2Uk5hQESDHvVq9f7SGw414/7Obkno+WcK/xLCp2E1Kmpm5TDC3tJycN4lcG0zT Mm/3MI5e/j/TYXTCncPQH+f72MbjmM8= Received: from mail-lj1-f197.google.com (mail-lj1-f197.google.com [209.85.208.197]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-358-6g9N9668NFireRbjYX4eFg-1; Wed, 17 Jul 2024 07:01:01 -0400 X-MC-Unique: 6g9N9668NFireRbjYX4eFg-1 Received: by mail-lj1-f197.google.com with SMTP id 38308e7fff4ca-2ee9b383ffbso67775491fa.1 for ; Wed, 17 Jul 2024 04:01:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721214060; x=1721818860; h=content-transfer-encoding:in-reply-to:organization:autocrypt:from :content-language: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=3dokGBRJNRPX4aDNhf96lE0TemV8Sinj+IipwlZ/PiA=; b=lxg/HhonVsPA6J2kd/LRoX7RQmgqdTzv7bveNAj4YeWcRITjtL4kov+bCyzFe8zlT/ aXPFIdXOYUvenf/ZCCCCdJQP8b5LnVxPEg0qrmFCgojzuXqgYQ3inoT5A86YPaAb54a7 NOWlBosC8B79uAnKHSAgCrZ3goDEtbLz6oHUUHRb9KIE1WlYo3ihQzIcpLn3Ff41vBrY WzKXc/YY7PHrv1PwLtoGMjD5UOKaptyFA4rxt7D1P7Z26h6z90FYr49E0p60V5SYALhA OxQjOAwwNg59aF6JInnJz2ORrSMTj/CZBbsqurvjyf8SsDjcv+gQEak/NCWcA75PWocg Z9kA== X-Forwarded-Encrypted: i=1; AJvYcCWFYrXGAy6LXdiWVGpRsCAUAmgLcsWxKDpcpa7zimX+kN/jP8zb+LwD29cAO9zSFZ/cW4TplnfheyFrB7yG6gHG0BI= X-Gm-Message-State: AOJu0YzbD5zjKxiUBCwjsx7Hq8/VWMsmcAjZG6DIiktZ1JQf4i9B5t4F jEepxUbbcJ6wzfqe0fhmIP+Ay6UqZYzt3IZjmsuYGv3uv9hZVcIJoxtBAwsBvKzvZG6o09yIsi4 P6Crngxz1elodoSyWWXk+qzCOaWC4XeeVa2r8x6USn3EeugXm X-Received: by 2002:a05:651c:201d:b0:2ee:bcf3:2686 with SMTP id 38308e7fff4ca-2eefd0ae355mr8730111fa.21.1721214060283; Wed, 17 Jul 2024 04:01:00 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHcZ9Od4wgDKc6WEeGi24L5FDxYMjC4X23trcMFTV8Ot8EMEAEMHaFlb/NzL91WTKBaTxT4ww== X-Received: by 2002:a05:651c:201d:b0:2ee:bcf3:2686 with SMTP id 38308e7fff4ca-2eefd0ae355mr8729881fa.21.1721214059803; Wed, 17 Jul 2024 04:00:59 -0700 (PDT) Received: from ?IPV6:2003:cb:c714:c00:b08b:a871:ce99:dfde? (p200300cbc7140c00b08ba871ce99dfde.dip0.t-ipconnect.de. [2003:cb:c714:c00:b08b:a871:ce99:dfde]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-427a5e77488sm169682395e9.9.2024.07.17.04.00.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 17 Jul 2024 04:00:59 -0700 (PDT) Message-ID: Date: Wed, 17 Jul 2024 13:00:58 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Regression on linux-next (next-20240712) To: "Borah, Chaitanya Kumar" , "peili.dev@gmail.com" , "akpm@linux-foundation.org" Cc: "Nikula, Jani" , "Saarinen, Jani" , "Kurmi, Suresh Kumar" , "intel-gfx@lists.freedesktop.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.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-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 0DED5C0026 X-Stat-Signature: gy869pwu9gghc614y4fu5ritx368w9h1 X-HE-Tag: 1721214063-650273 X-HE-Meta: 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 aoUvQjsW 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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 16.07.24 07:37, Borah, Chaitanya Kumar wrote: > Hello Pei, > > Hope you are doing well. I am Chaitanya from the linux graphics team in Intel. > > This mail is regarding a regression we are seeing in our CI runs[1] on linux-next repository. > > In version next-20240712[2], we saw the following regression (currently being masked by another regression) > > ````````````````````````````````````````````````````````````````````````````````` > <4>[ 14.530533] ============================================ > <4>[ 14.530533] WARNING: possible recursive locking detected > <4>[ 14.530534] 6.10.0-rc7-next-20240712-next-20240712-g3fe121b62282+ #1 Not tainted > <4>[ 14.530535] -------------------------------------------- > <4>[ 14.530535] (direxec)/171 is trying to acquire lock: > <4>[ 14.530536] ffff8881010725d8 (&mm->mmap_lock){++++}-{3:3}, at: unmap_single_vma+0xea/0x170 > <4>[ 14.530541] > but task is already holding lock: > <4>[ 14.530542] ffff8881010725d8 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x6a/0x450 > <4>[ 14.530545] > other info that might help us debug this: > <4>[ 14.530545] Possible unsafe locking scenario: > ````````````````````````````````````````````````````````````````````````````````` > Details log can be found in [3]. > > After bisecting the tree, the following patch [4] seems to be the first "bad" > commit > > ````````````````````````````````````````````````````````````````````````````````````````````````````````` > commit a13252049629a8225f38a9be7d8d4fc4ff5350e8 > Author: Pei Li mailto:peili.dev@gmail.com > Date:   Wed Jul 10 22:13:17 2024 -0700 > >     mm: fix mmap_assert_locked() in follow_pte() > > ````````````````````````````````````````````````````````````````````````````````````````````````````````` > > We also verified that if we revert the patch the issue is not seen. > > Could you please check why the patch causes this regression and provide a fix if necessary? This is know. There is a discussion along the original patch [1] on how to do it differently. But likely we'll tackle it differently [2]. So this patch should be dropped for -- which I think already happened because I cannot spot that patch in mm-unstable anymore. [1] https://lore.kernel.org/all/20240710-bug12-v1-1-0e5440f9b8d3@gmail.com/ [2] https://lkml.kernel.org/r/20240712144244.3090089-1-peterx@redhat.com -- Cheers, David / dhildenb