Larry Bassel <larry.bassel@xxxxxxxxxx> writes: > > Isn't Linux kernel archaeology fun :-) > > 13 years have elapsed. Given the many changes in the kernel since the original > patch submission, I'd appreciate your insight into the following questions: I believe the main objection (from Linus) back then that it would complicate page table locking significantly, and also add overhead for it. If anything locking (or even lack of locking, as in lockless code) has gotten far more hairy in the 13 years, so this issue likely got far worse. So if you would work on it I would start with some investigation what the locking scheme would take, how maintainable it would be, and how many atomics in hot paths it would add. -Andi
