On Tue, 8 Oct 2019, Leonardo Bras wrote: > So you say that the performance impact of using my approach is the same > as using locks? (supposing that lock never waits) > > So, there are 'lockless pagetable walks' only for the sake of better > performance? I thought that was the major motivation here. > I thought they existed to enable doing pagetable walks in states where > locking was not safe. That sounds profoundly dangerous. Usually locking makes things safe to access. Accesses without locking require a lot of care.
