On Tue, Mar 20, 2018 at 10:59:16PM -0700, Figo.zhang wrote: > 2018-03-20 21:53 GMT-07:00 Aaron Lu <aaron.lu@xxxxxxxxx>: > > > On Tue, Mar 20, 2018 at 09:21:33PM -0700, Figo.zhang wrote: > > > suppose that in free_one_page() will try to merge to high order anytime , > > > but now in your patch, > > > those merge has postponed when system in low memory status, it is very > > easy > > > let system trigger > > > low memory state and get poor performance. > > > > Merge or not merge, the size of free memory is not affected. > > > > yes, the total free memory is not impact, but will influence the higher > order allocation. Yes, that's correct.
