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hfc5U43y2H7U1+4EI7n5L/N6dazKyEE4ZVyceI4UpU8+cK37GTzr3BTHhuLpYooZwuDegvRu8frbc8kT2n5owPe/fISZ0BiyBDPD7uFY1Qe0aP9NzSt5q/IeQkgE9OnQLF2LbnZdN397VfUuemEESPmdnhnGnBgvOQBkz7FAZvkJBwv8Lzt2gOC4zv75saO5PEz0EaJptrq1OOwmoUWlGw/HKm3EIZiuQwZlSjElesO69mXIDK6RDJktoKKLchu4Y0X2CrJIBrvMMFQGwdt3pj9TMMmQSATciZDEyzYf/mY+PmJ8V7w7S6Hd7SeID8QOLIB/RJqv8R66wKl+LiIY/cY0JTC9r4lv9b7pgBPJo7efPWV50S6LIvf3i6pU18uD49qKiD1RI8g3Of3kapl+b9+YSg28ROpDBfZV2O8bKH9nRE4Wnfop+mBUAyK67rvZc+8mxLdrJZlAAJ60vU7l8c2yOcA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri Sep 4, 2026 at 11:10 AM EDT, Kiryl Shutsemau wrote: > From: "Kiryl Shutsemau (Meta)" > > madvise_collapse() holds an mmgrab() reference across its work. It is > redundant. Every caller already holds mm_users: > > - madvise(2) works on current->mm, which lives as long as the task is in > the syscall; > - process_madvise(2) reaches a remote mm through mm_access(), which take= s > an mm_users reference and holds it until the syscall returns; > - io_uring passes current->mm; > - DAMON takes one with get_task_mm() and drops it after the call. > > Drop the mmgrab()/mmdrop() pair. > > Assisted-by: Claude-Code:claude-opus-5 > Signed-off-by: Kiryl Shutsemau (Meta) > --- > mm/khugepaged.c | 2 -- > 1 file changed, 2 deletions(-) > Makes sense. Reviewed-by: Zi Yan --=20 Best Regards, Yan, Zi