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Howlett" Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-trace-kernel@vger.kernel.org, kernel-team@meta.com, Lance Yang References: <20260513-ecc_panic-v7-0-be2e578e61da@debian.org> <20260513-ecc_panic-v7-4-be2e578e61da@debian.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+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: <20260513-ecc_panic-v7-4-be2e578e61da@debian.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 3117E1C0005 X-Rspamd-Server: rspam06 X-Stat-Signature: 1g4stdbzjw8pu48dc55krjxnxfcyp3h5 X-HE-Tag: 1778701777-354056 X-HE-Meta: U2FsdGVkX18BVli18nzG4eTz6KHmwJw4vw6SBtsGO0k35ptKlZk4uv79q8nzHB79o+tfzivfB7nblJ2dRNtTGiUoiogaZmdx5HHnvm57rxom7X6LiCPJidXUgmV6M1W4qRxI4uo1KVrwLutcG9bMrHDwAXa0wjOAC8hW+iRDLKHVzB/YaNC8YGPQ5wfc7VDYZRjFONTjdw4ECmUEvTjEgnb/mt467TVFdPoEjo2WS3uIeY9yNrozLznrLPuNUHXIM/qKea/lr2jvC34n0C9k4+C9ZEsjewikWBxCWMGB17IHSKBIdCrBUPDiFm5wmRoz9SySHrd2EDrNjq1q7dqNVsWtmETziowkv9mYPdNHzz4kZG6Y8pIG4QVszUrquFtluiEPUId71vWiPNqei3MT71lhMw6BgyVWSYSSGx9O9OpvuXQjweuVKQzi0J7p1msdXufTNp3iwpZ3MOnwYroDDE/oMU0LUET/IeSol6IBS+QOXfniesIlF7ygadGiNP7O8l4FKqoAwcjl69XdcWhr2fWCA7BVKaqlLrWN49XETY3joSprzL8NfFOKCjmRv36VAU1vTBj+zcmucoIqYKvD0uKOZ5oLfh+l3Tsmm4G69Bz1Tfx/FuIxFCTr45yuEmcOX5dQxC5z6JFDG/yokeT/NUentdtMo3M75ru0V6YyM2quXPZRdc1m7YPQqMde1/b+rnpXJukiET5C84UtnPU+O6nfodQ0iaVR/Nch3aguTSNMDVDIqzqe8WuRWgJw2aquJ378hyzgal71n0GPcS7GFlI8UNT3bePdLAguNRYWybmBaGNLgEASUOdV/9WODwNZ2f0BOe8hEn4wMYpDOWry8zS+WiYWXNVEr8gsNgzS8sO9+jg42ksipMxT0mj7XUplQi0CSMExrWKUotyo88NtwQLNzXgPRNoCPc9V/simyzK32WlFTJLB9YFrzjPqu+4o4N/hxzDGk+ai6e/0DFd ZFc8VafF wkpDwnkuU4Zep22aBmAPxPoDyPd6xYNVMlheTA2pE4ouE9R9KtAcjJtG0KPn8bYaDLC/wrz8nV/6AwpKFpy6Du0xmGZfGGYQSlW66dEZg8ZVxDFjh6GA22bMQ15sM/EESIr5xh0j8wvW4jTqX3J0gj6xTs4kTg7VwQaHrqSRaWI3fjr/teLK7rTDtdcosdXPjr6T9qPFvk0PnbX3vLRj8fzAx28WS0nCv/20J8v83d2NZN1K5nr6nqUNW5PhNBypJddeq5sbzzqrntjcBBpi26VNLwPYtQH52HQqKgAxn1ONpP159KSXCIqzMXodqGPqBHt2QKdc6xFlWd5jB885k02ClqtZ96v0AfU1/l0YA/r9eK5KCPCj3qViLbxe5SHMDKP7r Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 5/13/26 17:39, Breno Leitao wrote: > The previous patch already classifies PG_reserved pages as > MF_MSG_KERNEL through the long path: get_hwpoison_page() calls > __get_hwpoison_page() which fails HWPoisonHandlable(), get_any_page() > exhausts its shake_page() retry budget, and the resulting > -ENOTRECOVERABLE is mapped to MF_MSG_KERNEL by the switch. The > outcome is correct but the work in between is wasted: shake_page() > cannot turn a reserved page into a handlable one. If really required, can we just move the check right there, into get_any_page() etc? -- Cheers, David