On Fri 08-05-20 15:25:17, Feng Tang wrote: > When checking a performance change for will-it-scale scalability > mmap test [1], we found very high lock contention for spinlock of > percpu counter 'vm_committed_as': Btw. you are focusing on a microbenchmark here but I believe that there are non-synthetic worklaods which would benefit from a larger batch. E.g. large in memory databases which do large mmaps during startups from multiple threads. -- Michal Hocko SUSE Labs
