* Matthew Wilcox <willy@xxxxxxxxxxxxx> [230217 15:14]: > We should continue the conversation from last year on the topic of page > fault scalability. I presume that by the time of the conference Suren's > current patches for per-VMA locks [1] [2] will be at least in Andrew's > tree, even if not quite upstream yet. We will then be in a good place > to discuss enhancements: > > - File-backed VMAs > - UFFD > - Swap > - Improve performance for low-thread-count apps > - Full RCU handling of (some) page faults A few other enhancements that we should discuss: - Adding protection of detached VMAs to mmap_lock page fault handler - Using detached VMAs to stop stack expansion and allow mmap_write_lock to downgrade regardless of surrounding VMAs. - Fast mmap_write_downgrade by using detached VMAs in other code paths. > > Suren Baghdasaryan, Liam Howlett, Michel Lespinasse, Laurent Dufour, > Peter Xu would all be good participants. > > [1] https://lore.kernel.org/linux-mm/20230216051750.3125598-1-surenb@xxxxxxxxxx/ > [2] https://lwn.net/Articles/906852/ > >
