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b=Xc+GCmXXjO7SWndjDHOMYXk4f3YbiyFouGV1Haxakt28T/a0hPCWi75njYqq9lrpg jVHZUoqXeajh7HibO9BnjItpPccS4yS0A48lVecHXa2WGu9PpTHpVW1zxnuZZwfgwX 1jPzc9K04ceG8+g0zLdC+GoRkSzHvxieohtDKTrLEPjAQXWtWw1PH+nIi4g/Ohj8N5 KiJg3E+ojnsoj1hbF/NXn93eLMrXOkXUsnsdfjrTP1+3yhATIcPp2NggQgQRcVkvAq Z8AfcmLB2cd26sfAN8nBzILxYZPDuPvf78VG8dT5oUdOrL4hjKmvoA14whUplp9QA2 ShfzjJhXpvoTg== Message-ID: <3113ac8b-c1ce-4577-9e93-449b70818918@kernel.org> Date: Wed, 19 Aug 2026 16:19:41 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 03/57] mm/collapse: add collapse.h for the shared collapse state To: Kiryl Shutsemau , akpm@linux-foundation.org, ljs@kernel.org, nico.pache@linux.dev Cc: baolin.wang@linux.alibaba.com, baohua@kernel.org, dev.jain@arm.com, hughd@google.com, lance.yang@linux.dev, liam@infradead.org, mhocko@suse.com, rppt@kernel.org, ryan.roberts@arm.com, shuah@kernel.org, surenb@google.com, usama.arif@linux.dev, vbabka@kernel.org, ziy@nvidia.com, usama.anjum@arm.com, agordeev@linux.ibm.com, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, kas@kernel.org, jannh@google.com, willy@infradead.org, pfalcato@suse.de, rostedt@goodmis.org, mhiramat@kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org References: <20260816224609.308019-1-kirill@shutemov.name> <20260816224609.308019-4-kirill@shutemov.name> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: AA2A8C0004 X-Rspamd-Server: rspam07 X-Stat-Signature: 7hr1tawnn7mwyb6szdozzdn315hih3z3 X-HE-Tag: 1787149193-314909 X-HE-Meta: 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 LZmfOSKl HcqyW23Rmr/jxr9ksNOX2P+vjTF13aq5CEAFDyPXT81m9BPkbnEWAAB/nDDpbfsOZ3BQbnirlJetkbcE10gcGB5JUNho/PlA47PWNJXcJLWhp82vzeFCQaTIUO1MLSmAkmOjo6AyNFGynJ9ZNkU0HnNCzGF3oIUMuOe1jcY5LO+LRVDzPeDMBbhsNb2DgC/QxLw9i6fMV1gshLmK43LvTvcg2Vmq04XSFMDKZRb4L8JATSIabO4ZArj6maU9kWcND3gGoSnOaXOTMDJvt7wbPLGhiqw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 8/17/26 00:45, Kiryl Shutsemau wrote: > From: "Kiryl Shutsemau (Meta)" > > Preparation for building the new collapse engine in its own file. The > engine and khugepaged.c need to agree on what a collapse result is and > what state a scan carries. > > Move enum scan_result and struct collapse_control into a new > mm/collapse.h. > > No functional change intended. > > Assisted-by: Claude-Code:claude-opus-5 > Signed-off-by: Kiryl Shutsemau (Meta) > --- BTW, I'm wondering whether it would result in less churn (independent of the other changes) to a) Rename mm/khugeapged.c to mm/collapse.c b) Move stuff into mm/collapse.h that a new ... c) mm/khugapegd.c will need. -- Cheers, David