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 1wWX66Fh wmlBlW2VYgWBYC9eeLxx6tSd/XtULAosXtevtfMNS5lVUV9ZLLpIfUoyUdhkzgSi/CAHHrp3AEZXTftTc31ACVsDmSk9XmUQVbCHjIvcIjbUnupnQRgKIE3aqgMScf1GMBIh2KCxxOMR6saXjdrbL2aeMazONh3MqodBXodIrbJDBnepCfz+ePy7gBBcQvJAHjrBUbiUpdujhgPModhzhfhxPC7xhV8/JsShniehq3pM0CVVBbfApEFUGGfsndGoY+jMglyXAuF5GmTRLjkE7oBNhHSeeBVkR0QtFmzrxUzI+KbaZsubYlsYryHcMWdvw+1+gguIniHiijkG/+A2oLcq9Yl29YyVTvNnjkTVH3fY5zDhalZP6v39gC3LrJ8f4GaeCMqM6zAxeqeFlByIUmXJvgTgWD+KcxHE8EgiNXsqP8QJYjZYTn73yBFNai7E5yfWfg7fx8OB/6djpm7Tr6TjCevuTzUTyWdogsfsgq0u+Cu8= 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 9 Feb 2026, at 11:06, David Hildenbrand (Arm) wrote: > On 2/9/26 17:05, Zi Yan wrote: >> On 9 Feb 2026, at 11:03, David Hildenbrand (Arm) wrote: >> >>> On 2/9/26 17:00, Zi Yan wrote: >>>> >>>> >>>> Currently, _mm_id (_mm_ids) overlaps with page->private. At split time= , >>>> it should be MM_ID_DUMMY (0), so page->private should be 0 all time. >>> >>> Yes, it's designed like that; because that check here caught it during = development :) >>> >>>> >>>> >>>> It is still better to have the check and fix in place. Why do we want = to >>>> skip device private folio? >>> >>> I don't understand the question, can you elaborate? >> >> You said, >> =E2=80=9CBTW, I wonder whether we should bring that check back for non-d= evice folios.=E2=80=9D >> >> I thought you know why device folio needs to keep ->private not cleared = during >> split. > > Oh, I thought there was some overlay of ->private with zone-device specia= l stuff. But I checked the structs and didn't spot it immediately. So I end= ed up asking Balbir as reply to his latest series that got merged. Got it. We will bring it back once we hear back from Balbir. Thanks. Best Regards, Yan, Zi