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Howlett" , Linus Torvalds , linux-arm-kernel@axis.com, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ide@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mips@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, Lorenzo Stoakes , Marco Elver , Marek Szyprowski , Michal Hocko , Muchun Song , netdev@vger.kernel.org, Oscar Salvador , Peter Xu , Robin Murphy , Suren Baghdasaryan , Tejun Heo , virtualization@lists.linux.dev, Vlastimil Babka , wireguard@lists.zx2c4.com, x86@kernel.org, Zi Yan References: <20250821200701.1329277-1-david@redhat.com> <20250821200701.1329277-11-david@redhat.com> <9156d191-9ec4-4422-bae9-2e8ce66f9d5e@redhat.com> <7077e09f-6ce9-43ba-8f87-47a290680141@redhat.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 ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+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: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: mys9TbInvZ4HlMXJx1G97tuBvoNN94kTORv_Jk_Rpe4_1756126142 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: D1C9840011 X-Stat-Signature: y98oyyhrpop94oh1c6zee7uda845doid X-Rspam-User: X-HE-Tag: 1756126144-62633 X-HE-Meta: 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 Hf699rZi 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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 23.08.25 10:59, Mike Rapoport wrote: > On Fri, Aug 22, 2025 at 08:24:31AM +0200, David Hildenbrand wrote: >> On 22.08.25 06:09, Mika Penttilä wrote: >>> >>> On 8/21/25 23:06, David Hildenbrand wrote: >>> >>>> All pages were already initialized and set to PageReserved() with a >>>> refcount of 1 by MM init code. >>> >>> Just to be sure, how is this working with MEMBLOCK_RSRV_NOINIT, where MM is supposed not to >>> initialize struct pages? >> >> Excellent point, I did not know about that one. >> >> Spotting that we don't do the same for the head page made me assume that >> it's just a misuse of __init_single_page(). >> >> But the nasty thing is that we use memblock_reserved_mark_noinit() to only >> mark the tail pages ... > > And even nastier thing is that when CONFIG_DEFERRED_STRUCT_PAGE_INIT is > disabled struct pages are initialized regardless of > memblock_reserved_mark_noinit(). > > I think this patch should go in before your updates: Shouldn't we fix this in memblock code? Hacking around that in the memblock_reserved_mark_noinit() user sound wrong -- and nothing in the doc of memblock_reserved_mark_noinit() spells that behavior out. -- Cheers David / dhildenb