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b=F2sPU+z4IPTNPXgA+GjqIRgHYF9PPFTGzsJ3S5kTQI0nTCx+m6Tr5FkMgFowSja1f We/mTmsyf5PgYQTsK+yxnWPtHjdeR942OQv/gXobBlNsfDZcKrIYIDJ/4cCB/wyUjo hp/icgVPvJHlrQ8u+wmWLPULS5mh1BWI510HIoY3+2ow9Rn347x45R0muFarvHusAK M+IgyQVNbkXzuTTKtUKb9XAvIKKEVzclfUUhKhwL9Hw7iSaa5RZxb/bXNWWKEQezA1 7tb1TJX7gdUflkeEKqlxWCIt9pVUCSbb8A/ZLpgDRjPPrI6RNBD0S4z4Tf2ctD0+W6 RYlyKlMwzXHUw== Message-ID: Date: Thu, 5 Mar 2026 12:33:24 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: walk_pgd_range BUG: unable to handle page fault To: Tytus Rogalewski Cc: linux-mm@kvack.org, muchun.song@linux.dev, osalvador@suse.de, Jens Axboe References: <5948f3a6-8f30-4c45-9b86-2af9a6b37405@kernel.org> <0dfd588c-3284-4310-b1cd-aab54567f0c0@kernel.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: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Stat-Signature: xzxbntpxqm8ufkye7goz9mkdkj9557ep X-Rspam-User: X-Rspamd-Queue-Id: C961940008 X-Rspamd-Server: rspam12 X-HE-Tag: 1772710409-781782 X-HE-Meta: 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 ABiw+FGi vGEHQ9VV9zLZ2sagPbNoRfVTUjYQNZF/6mZgMm/hBvZP0VjUmIDw8kyv1LMPFMTFSjoO0pdYwHKOj8f0cuL3H9OoRRTXD3a7FwqlCTcMfHjp0LLL9/tN4TveX0Q0a5S6kqlrSZRC/swHHdr8MLk92KHnKTfoVUewpjIrs4vbmJW6T0gvZY0O1paRzGzoXuv5NGkRrazH5P3UAUpvsaEhDgNOSDNW71dvKZ3/fHI1acqmQJE2gcTYTCiKaghJitLKVuQE1kjUbfnnwsJ2aOV9WJypPlVNQgp1+544i3Zh8+6IQZvyL6h13X4IY4NY4wS2IG1hL9kEj3wqdpvO+0ZHJVvbyQ2M6P6IWkGga Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 3/5/26 12:29, Tytus Rogalewski wrote: > Memory space was fine. > I have big mem usage as i allocating 95% memory into huge pages 1G > so the rest is 32-64GB of memory for system. Anyway i had plenty at that > time when this happened Just to confirm, you were able to reproduce this also on an upstream 6.19-rc4+, correct? -- Cheers, David