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(p200300d82f358a0042f7265734cca51f.dip0.t-ipconnect.de. [2003:d8:2f35:8a00:42f7:2657:34cc:a51f]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b79c47b10asm22303636f8f.60.2025.08.06.04.28.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 06 Aug 2025 04:28:58 -0700 (PDT) Message-ID: <8a39bcff-d0cf-4c1e-a076-f676a9ace4ba@redhat.com> Date: Wed, 6 Aug 2025 13:28:56 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/5] add static huge zero folio support To: "Pankaj Raghav (Samsung)" , Dave Hansen Cc: Suren Baghdasaryan , Ryan Roberts , Baolin Wang , Borislav Petkov , Ingo Molnar , "H . Peter Anvin" , Vlastimil Babka , Zi Yan , Mike Rapoport , Dave Hansen , Michal Hocko , Lorenzo Stoakes , Andrew Morton , Thomas Gleixner , Nico Pache , Dev Jain , "Liam R . 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Wong" , mcgrof@kernel.org, gost.dev@samsung.com, hch@lst.de, Pankaj Raghav References: <20250804121356.572917-1-kernel@pankajraghav.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/g1oFAmgsLPQFCRvGjuMACgkQTd4Q 9wD/g1o0bxAAqYC7gTyGj5rZwvy1VesF6YoQncH0yI79lvXUYOX+Nngko4v4dTlOQvrd/vhb 02e9FtpA1CxgwdgIPFKIuXvdSyXAp0xXuIuRPQYbgNriQFkaBlHe9mSf8O09J3SCVa/5ezKM OLW/OONSV/Fr2VI1wxAYj3/Rb+U6rpzqIQ3Uh/5Rjmla6pTl7Z9/o1zKlVOX1SxVGSrlXhqt kwdbjdj/csSzoAbUF/duDuhyEl11/xStm/lBMzVuf3ZhV5SSgLAflLBo4l6mR5RolpPv5wad GpYS/hm7HsmEA0PBAPNb5DvZQ7vNaX23FlgylSXyv72UVsObHsu6pT4sfoxvJ5nJxvzGi69U s1uryvlAfS6E+D5ULrV35taTwSpcBAh0/RqRbV0mTc57vvAoXofBDcs3Z30IReFS34QSpjvl Hxbe7itHGuuhEVM1qmq2U72ezOQ7MzADbwCtn+yGeISQqeFn9QMAZVAkXsc9Wp0SW/WQKb76 FkSRalBZcc2vXM0VqhFVzTb6iNqYXqVKyuPKwhBunhTt6XnIfhpRgqveCPNIasSX05VQR6/a OBHZX3seTikp7A1z9iZIsdtJxB88dGkpeMj6qJ5RLzUsPUVPodEcz1B5aTEbYK6428H8MeLq NFPwmknOlDzQNC6RND8Ez7YEhzqvw7263MojcmmPcLelYbfOwU0EVcufkQEQAOfX3n0g0fZz 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+DWgUCaCwtJQUJG8aPFAAKCRBN3hD3AP+DWlDnD/4k2TW+HyOOOePVm23F5HOhNNd7nNv3 Vq2cLcW1DteHUdxMO0X+zqrKDHI5hgnE/E2QH9jyV8mB8l/ndElobciaJcbl1cM43vVzPIWn 01vW62oxUNtEvzLLxGLPTrnMxWdZgxr7ACCWKUnMGE2E8eca0cT2pnIJoQRz242xqe/nYxBB /BAK+dsxHIfcQzl88G83oaO7vb7s/cWMYRKOg+WIgp0MJ8DO2IU5JmUtyJB+V3YzzM4cMic3 bNn8nHjTWw/9+QQ5vg3TXHZ5XMu9mtfw2La3bHJ6AybL0DvEkdGxk6YHqJVEukciLMWDWqQQ RtbBhqcprgUxipNvdn9KwNpGciM+hNtM9kf9gt0fjv79l/FiSw6KbCPX9b636GzgNy0Ev2UV m00EtcpRXXMlEpbP4V947ufWVK2Mz7RFUfU4+ETDd1scMQDHzrXItryHLZWhopPI4Z+ps0rB CQHfSpl+wG4XbJJu1D8/Ww3FsO42TMFrNr2/cmqwuUZ0a0uxrpkNYrsGjkEu7a+9MheyTzcm vyU2knz5/stkTN2LKz5REqOe24oRnypjpAfaoxRYXs+F8wml519InWlwCra49IUSxD1hXPxO WBe5lqcozu9LpNDH/brVSzHCSb7vjNGvvSVESDuoiHK8gNlf0v+epy5WYd7CGAgODPvDShGN g3eXuA== Organization: Red Hat In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 0nJqjxrniqYFsxzKPeQqc4eEp2Bfg_eEIgOeHBuIVHw_1754479740 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 99AA418000F X-Rspam-User: X-Rspamd-Server: rspam09 X-Stat-Signature: iehthhmzbo5w3yg6wfbd5wysm8m6h34r X-HE-Tag: 1754479742-676580 X-HE-Meta: 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 6Gj0YCGh 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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 06.08.25 10:31, Pankaj Raghav (Samsung) wrote: > On Tue, Aug 05, 2025 at 09:00:40AM -0700, Dave Hansen wrote: >> On 8/4/25 05:13, Pankaj Raghav (Samsung) wrote: >>> Add a config option STATIC_HUGE_ZERO_FOLIO that will always allocate >>> the huge_zero_folio, and it will never drop the reference. >> >> "static" is a really odd naming choice for a dynamically allocated >> structure. It's one that's never freed, sure, but it's still dynamically >> allocated in the first place. > > That is a fair point. > > I like the rename you did to PERSISTENT_HUGE_ZERO_FOLIO instead of > STATIC_HUGE_ZERO_FOLIO as we still allocate it dynamically. > > @David, @Lorenzo and @Zi: Does the rename sound good to you? Yes, sounds good. -- Cheers, David / dhildenb