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b=b8gXKnxtilovGoQt/RW1o8BSCQzuOk6OOsKogEbG5+X+5fsPrd13d3yWs33JrzPxE Gj3vFj9z4/d79ItKHtTUfqkuOboknn/zrESvDETRZ9IKQ39gjg6LiWiylIqboU4qr3 weDU521lqSitaLkIecXl8igajFQiCgnH1yRMF7tlzjPTnWZPctELpDNrtqCcNTSMOq 2sYmLkzCslwP4Igx+HoDgkx391ulyU86BS1jEeY89KhFrRS7uk4s7QkyQ74xHfHeF7 6JUFEGMJLgtx12YfkXqcSYs0zqTkfkmC8ZB25HykE4fv9eGJ8JF0fNniD2rFB81jg1 JuWIaD2XAXffw== Message-ID: <1fd5fc85-c918-4eb0-8b57-ed09479a9770@kernel.org> Date: Mon, 18 May 2026 18:49:46 +0900 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: "Harry Yoo (Oracle)" Subject: Re: [PATCH] Revert "mm: introduce a new page type for page pool in page type" To: Byungchul Park , akpm@linux-foundation.org Cc: kernel_team@skhynix.com, ast@kernel.org, daniel@iogearbox.net, davem@davemloft.net, kuba@kernel.org, hawk@kernel.org, john.fastabend@gmail.com, sdf@fomichev.me, saeedm@nvidia.com, leon@kernel.org, tariqt@nvidia.com, mbloch@nvidia.com, andrew+netdev@lunn.ch, edumazet@google.com, pabeni@redhat.com, david@kernel.org, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, horms@kernel.org, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, ilias.apalodimas@linaro.org, kas@kernel.org, willy@infradead.org, baolin.wang@linux.alibaba.com, asml.silence@gmail.com, toke@redhat.com, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <20260515034701.17027-1-byungchul@sk.com> Content-Language: en-US In-Reply-To: <20260515034701.17027-1-byungchul@sk.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 9D2D312000B X-Rspamd-Server: rspam04 X-Stat-Signature: tqbwgf5nyezen91jdnz93gqnobtxwfon X-HE-Tag: 1779097795-797273 X-HE-Meta: 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 SLIGcr9y AhtYjyiNpBrR0adfb8PY8fpynKpwbVBTTH8+9/PB9xDlIUwgS0DQEiNJWdjxmfDR9sWJGOJmIIxaKA3kNNR22tfZdBTgXdulHfE+xT5TWVji3o85D5L2jAkYPGxtdTeq7cgVVRDM7kU/1Ov4OgBYenD5doKVu5isgcgQPjsjEjRFutWaDNt74vTAXBQNAeYKT65zDVFia8A5qHYIW8OQYuHTHpGRnY90x3pmYG72nh8QY3KPPdAeY3SHHPK46t0xdsqSA5jtM02BXvK9ZzWUIP1r4kxUSMFBg03wvsX3BDiVhd2/JjTwmFpNpKvg/Nn7If8eAV3LAR464P0ZzDD3Fuzvp+fg2HazCm4e6WQ4Xg9THRf78NVetUE/SDdBoJqW1tGpd6fEM3l9t3SGytNIm0zhOolDgtY6b29w5RWdBHgB+sRYlvArE6bEZ+G6+lW/YZ9wQ6mBjkxtQB1uGY3FVvjkIx71JnEtdavON Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 5/15/26 12:47 PM, Byungchul Park wrote: > This reverts commit db359fccf212e7fa3136e6edbed6228475646fd7. > > Netpp page_type'ed pages might be used in mapping so as to use > @_mapcount. However, since @page_type and @_mapcount are union'ed in > struct page, these two can't be used at the same time. Revert the > commit introducing page_type for Netpp for now. Uh, didn't realize that those pages can be mapped to userspace... > The patch will be retried once @page_type and @_mapcount get allowed to > be used at the same time. > > The revert also includes removal of @page_type initialization part > introduced by commit 735a309b4bfb9e ("net: add net_iov_init() and use it > to initialize ->page_type"), which will be restored on the retry. > > Reported-by: Dragos Tatulea > Closes: https://lore.kernel.org/all/982b9bc1-0a0a-4fc5-8e3a-3672db2b29a1@nvidia.com > Signed-off-by: Byungchul Park > --- Looks good to me, so: Acked-by: Harry Yoo (Oracle) -- Cheers, Harry / Hyeonggon