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b=ENLrYjDII187/GnAQyg9/9GEbmnQHyUDrfHVlxPS1r+9N1XUrnCRiVJajy/KEk+k4 mziLakPQkRE5n1+HizkVqkZ9qYX9TZxmCcuJuTxO0O94S5HG0MK46sFnRYAvkh7GXU groMkIJPE/luoxAxjZf6VEuI0c7TvkWMxVj+3Ar2Y+IXtXwPHcwYDKtNWjDhkTUOk+ DJhafpe64hzzoEDowEiu1osDYYmyWo6w9i0hfmWCWytBqMTQIJ78Oq5enrW0GLYkdR dPBJdnh0cCoyMZOl8F9cYTq6y5TCB2v0H+XQsUE4VLcRNP4+0FWkqD1LMZVmwE4EUy Yg3TlLabpy82A== Message-ID: Date: Fri, 22 May 2026 09:45:02 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] Revert "mm: introduce a new page type for page pool in page type" Content-Language: en-US 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, 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> From: "Vlastimil Babka (SUSE)" In-Reply-To: <20260515034701.17027-1-byungchul@sk.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 26D5180011 X-Stat-Signature: dc4rksxmkje3jd8efxktgntiy9si4e99 X-HE-Tag: 1779435911-944112 X-HE-Meta: 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 E5QnorCw uhm/H+dTu5zief40iqEBxvMe3Cs/0LjLb018w06qAUqS9mDH2B3K/LechsU13867vJR92nPRM+ho9LhFrTmOQOLZ3SO2Id8DIDHfu4SlC25OiSxYTbRWoETT0uYl3SYwrMJCdl7dXjmgyvqwiQvjIkBCQq5gB0JDHZF314NEVwqmCAwbk1+W8JFw1ffU0KSa6lDdhcmBHX1ned1ni8v31lxjBXbkYG3j5+ml307wX1p+vI+VDAKCGbq4ysp8lVy1hb7douCaY14dRl9jHh3TKOBa+kG5Pr9Da9Aepma5aJBsBwtneXNm+gqdpAsIHttahc2h0OX3Ts770js56VtqyAUC/bPdCxrgNo38L8FQ8KsQ3iYiekHZ0p5Ero73AXBj/2xAk7K4kirEEy2IIZu1A5yJPV/Jc6pL7Ab7X6ByPyWaYlp1EM0voCoeHhEZzw8ZlUyY9A3RJFlYazkkpl8UcJUkaPX9JlGckM7pq Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 5/15/26 05:47, 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. > > 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 Unfortunate that it didn't work out yet. Acked-by: Vlastimil Babka (SUSE) Thanks!