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(p200300cbc744b5003f9d130dea00afc7.dip0.t-ipconnect.de. [2003:cb:c744:b500:3f9d:130d:ea00:afc7]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-41f4307ded2sm11264245e9.0.2024.05.07.09.55.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 07 May 2024 09:55:51 -0700 (PDT) Message-ID: <99358cd9-3f3f-4ba1-bd8b-898cdf819e2d@redhat.com> Date: Tue, 7 May 2024 18:55:50 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] x86/fault: speed up uffd-unit-test by 10x: rate-limit "MCE: Killing" logs To: John Hubbard , Andy Lutomirski Cc: Dave Hansen , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H . Peter Anvin" , LKML , linux-mm@kvack.org, Peter Xu , Axel Rasmussen References: <20240507022939.236896-1-jhubbard@nvidia.com> <016d8cff-efc3-4ef1-9aff-7c21c48f2d69@redhat.com> <302d50ac-45ff-470e-90a0-b349821706a6@nvidia.com> <21d88422-7378-4a63-8fbf-f70889f309c1@redhat.com> <16ab2040-9d99-41b8-8b9d-39b0753533c6@nvidia.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: <16ab2040-9d99-41b8-8b9d-39b0753533c6@nvidia.com> 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: rspam09 X-Rspamd-Queue-Id: 1C6B41A000B X-Stat-Signature: 6mpqj4gk7166nbmmo939w7mkkc9nrnzi X-HE-Tag: 1715100955-91937 X-HE-Meta: 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 CJWrG9F8 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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 07.05.24 18:53, John Hubbard wrote: > On 5/7/24 9:43 AM, David Hildenbrand wrote: >> On 07.05.24 18:28, John Hubbard wrote: >>> On 5/7/24 1:13 AM, David Hildenbrand wrote: > ... >>> I'd like to just do this patch almost as-is, just with a fixed up >>> subject, >>> perhaps: >>> >>>       x86/fault: rate-limit to avoid flooding dmesg with "MCE: Killing" >>> reports >>> >>> Yes? >> >> >> Makes sense to me (and thanks for confirming that we don't need >> complexity elsewhere). >> >> I think we at least need "Fixes:" (not sure if stable is warranted as >> well, 1b0a151c10a6d823f033023b9fdd9af72a89591b didn't CC stable). >> >> Consider adding a link to the report in that thread. >> >> Acked-by: David Hildenbrand >> > > OK, there's enough changes to the commit description that I'll go ahead > and send a v2, with a new subject line, a Fixes:, your Ack, a link to > the other conversation, and maybe reword a bit based on your feedback > too. Sounds good. We might want to CC stable: I just read 1b0a151c10a6d823f033023b9fdd9af72a89591b and I think the problem there cannot really be triggered by unprivileged users. Hm... thanks! -- Cheers, David / dhildenb