On Fri 23-03-18 17:19:26, Zhaoyang Huang wrote: > On Fri, Mar 23, 2018 at 4:38 PM, Michal Hocko <mhocko@xxxxxxxxxx> wrote: > > On Fri 23-03-18 15:57:32, Zhaoyang Huang wrote: > >> For the type of 'ALLOC_HARDER' page allocation, there is an express > >> highway for the whole process which lead the allocation reach __rmqueue_xxx > >> easier than other type. > >> However, when CMA is enabled, the free_page within zone_watermark_ok() will > >> be deducted for number the pages in CMA type, which may cause the watermark > >> check fail, but there are possible enough HighAtomic or Unmovable and > >> Reclaimable pages in the zone. So add 'alloc_harder' here to > >> count CMA pages in to clean the obstacles on the way to the final. > > > > This is no longer the case in the current mmotm tree. Have a look at > > Joonsoo's zone movable based CMA patchset http://lkml.kernel.org/r/1512114786-5085-1-git-send-email-iamjoonsoo.kim@xxxxxxx > > > Thanks for the information. However, I can't find the commit in the > latest mainline, is it merged? Not yet. It is still sitting in the mmomt tree. I am not sure what is the merge plan but I guess it is still waiting for some review feedback. -- Michal Hocko SUSE Labs
