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owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: * Michal Hocko [250904 08:21]: > On Wed 03-09-25 15:02:34, Liam R. Howlett wrote: > > * Michal Hocko [250903 08:58]: > > > On Wed 03-09-25 17:27:29, zhongjinji wrote: > [...] > > mmu_notifier_release(mm) is called early in the exit_mmap() path should > > cause the mmu notifiers to be non-blocking (according to the comment in > > v6.0 source of exit_mmap [1]. > > I am not sure I follow you here. How does this relate to the actual > direction of the address space freeing? It doesn't relate to the direction of the address freeing, I think it explains the perf data a bit. The exit_mmap() would have a decrease in mmu related work while this thread will have an increase, I think. If they race, this thread gets virtually nothing while exit does all of the work. If they don't race then the work is split. Does that make sense? Thanks, Liam