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b=EdiPHIZczaLrvC6LCXy6Vea01EDNtOVkGVo3avaCvJVFCiuCI0ZWN6D+yYg+4ECN9 qqR/mB6j6RsZ6BQ/jn9d5dRz1SRdcIRhDQ2enMhEPNwDYGZBpBGgGJHvvykl0RsTxU iO3fyhJIGlhQKdaimWBUwJ7dfKj/iX+lbex+oEvoKs0PDODt4UeeAlIRnp0T76GfOQ r6+BgDmwMW7j+cmCzjpkY7nF1wyGCJxvSO0x2wos/ZC4UNMqX3TrxhWwRjlsLR/G64 I/klgEq+NszAafk61X0XcXwkzG3NU3OEiKSu4Q8K79F4mTG9heBe6mULLpBIBxd0Yv cIyZzfG+Rscyg== Message-ID: <9b227263-56d9-41d5-ba8e-c969d8d68785@kernel.org> Date: Thu, 9 Jul 2026 12:04:33 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 4/4] mm/mlock: migrate folios out of CMA when mlocking a range To: Wandun Chen , vbabka@kernel.org, rostedt@goodmis.org, mhiramat@kernel.org, Alexander.Krabler@kuka.com, hughd@google.com, fvdl@google.com, bigeasy@linutronix.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev Cc: akpm@linux-foundation.org, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, ljs@kernel.org, riel@surriel.com, liam@infradead.org, harry@kernel.org, jannh@google.com, lance.yang@linux.dev, mathieu.desnoyers@efficios.com, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, gourry@gourry.net, ying.huang@linux.alibaba.com, apopple@nvidia.com, pfalcato@suse.de References: <20260707125925.3725177-1-chenwandun1@gmail.com> <20260707125925.3725177-5-chenwandun1@gmail.com> 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-Stat-Signature: pwo1qh1zp6g7ebwen8ezb7c7rjnrf784 X-Rspamd-Queue-Id: C7FE6180003 X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1783591484-906899 X-HE-Meta: U2FsdGVkX1++IBZABaUtQxXglRS1gKCp7pULcAq/xBLfokRdKjlFv1J9/PIt099RniKKUr8g4owk9f/czEwJrn/JHEg72aXek3smkcZWm/LydsPqziVfaFzxjy2+pAcZn13x9qMuwCGUXNvDGUmsRbyFSKBFXjB+OJPFIafFT8iH7LJWH3OHWAm+jEDNAWihNk5RAtulPcZrwHYI/KlviL6bumK6Yn7scZHApbHBQ53Ctd+HTxOH9diZAJ8oEgrWgE8RU7y/Ga6TFQ5+5cW/ZhHr3lA0AHP0bJGJYLsadM28lgsLdJo2F0zG6AOHidArFAxR3SkKMBQ8aNIYNV5EXsn/Tsqxw/x5mCk1NqhpkwsqRyspdjQVtPoND041NqY01K7O0TCWBEJnq0y/r++LjxGxCtG9PHA3FulvSe8fxdVwBL7tNmaSUIXhVjiN2myMWmf/csVbyVlcU+F1bFdWg4zQmKTIGsPd67SZxaS9Idcj1vwQHoWBB9q3aifSaSDRfovXiA+WH/dyzz+QVpI7lSOQkTPyDqSr+yNE1tbMZhetPmhYc3ejTprsL97E9JiBZYldKUDW+BFhz4U5Cl4zisah62SmEZFPA7hpijYFtVd6hZbQmPA8rYW1vAJgw0hdinYFYlx0Y4QmD/7dCj4OaBlV9rDnOeiOLPgDq9ZypRmePP145T1vpWXHNu8NawpHrTWOHd8yIgfmjb0Q6NkLnM8Lh01I8NDvabktgRZzU3cqTzn1sR6ph687QIJjACDQ+fk8JyI3Ju+uI3c3m2F65ht5SOR3mxYr30n5TbyuQ0CIcx767mM2m5ZboqPy8pP2aZc4Mb3s1RuL7NZdM17wiJXmMpjhzNZdrw91dAHNnQ8dlAF7uEleBHxaf46e3O68mplB6K5mhQj4Yw3nmn3B7i+94UwSTgYg68gfBG66UT0KafiopaAIFU2MawWNo60yF0S8jjGqPaqG5T0dst/ dQGI58oD Nx06BHV5HFLdAvtKR+WvjHvbUc8ilx5HaZuHxvdqxWLElOwtNZ6bEgBI0DDuBrbK8K+DJj89ex1hz1ak3UWgk0fY/yZerDybzA0GZijw2leMjkpMG0AeMxQw1seSrUCyzF8YC4STMmg7u3fIch3qB0AQQdQRdZ043sCQb0NwxNGL5b/1LBRsp8WoRqhdl/JYwS+8VorlLts5URM4mjgFOUAP25A1DIaEAuy1RcLV3Ja3scXJpxsBeyrW8MK+Diut+rkn6wKxSN/HbpemoDpnuNX3Aid/O+0u2c5igNvupEmJ4edfs4v9BvPqSE7uYfQguAndrX/FyjiGbk7hr0jb2RxCzRP+4HKWblnCATnPpv/exF29/4/0RtW4+k/USklGv31afL2spviiKC58= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 7/7/26 14:59, Wandun Chen wrote: > From: Wandun Chen > > The region covered by mlock[all] may contain CMA pages. cma_alloc installs What about ZONE_MOVABLE where memory is supposed to be migratable? Also, what about drivers that mmap() CMA memory to user space, and __mm_populate()->populate_vma_page_range() would actually try mlocking them, and they actually must remain on CMA areas? -- Cheers, David