On Fri, May 15, 2020 at 05:04:40PM +0800, Michal Hocko wrote: > On Fri 15-05-20 16:11:09, Feng Tang wrote: > > On Fri, May 15, 2020 at 03:23:07PM +0800, Michal Hocko wrote: > > > On Fri 08-05-20 15:25:16, Feng Tang wrote: > > > > percpu_counter_sum_positive() will provide more accurate info. > > > > > > Why do we need that? > > > > This is a preparation for patch 3/3, which will enlarge the batch size > > of percpu-counter 'vm_committed_as'. Andi Kleen concerned that may > > hurt the accuracy for those readers (currently only /proc/meminfo > > and hyperV balloon drivers for status check) > > > > As in worst case, the deviation could be 'batch * nr_cpus', and > > with patch 3/3, that could be totalram_pages/16. > > This information belongs to the changelog. Will add it in v3, thanks - Feng
