On Tue, Nov 6, 2018 at 5:08 PM Michal Hocko <mhocko@xxxxxxxxxx> wrote: > > On Tue 06-11-18 17:03:51, Kuo-Hsin Yang wrote: > > The i915 driver uses shmemfs to allocate backing storage for gem > > objects. These shmemfs pages can be pinned (increased ref count) by > > shmem_read_mapping_page_gfp(). When a lot of pages are pinned, vmscan > > wastes a lot of time scanning these pinned pages. In some extreme case, > > all pages in the inactive anon lru are pinned, and only the inactive > > anon lru is scanned due to inactive_ratio, the system cannot swap and > > invokes the oom-killer. Mark these pinned pages as unevictable to speed > > up vmscan. > > > > Export pagevec API check_move_unevictable_pages(). > > > > This patch was inspired by Chris Wilson's change [1]. > > > > [1]: https://patchwork.kernel.org/patch/9768741/ > > > > Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> > > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > > Cc: Dave Hansen <dave.hansen@xxxxxxxxx> > > Signed-off-by: Kuo-Hsin Yang <vovoy@xxxxxxxxxxxx> > > Acked-by: Michal Hocko <mhocko@xxxxxxxx> > > please make it explicit that the ack applies to mm part as i've > mentioned when giving my ack to the previous version. > > E.g. > Acked-by: Michal Hocko <mhocko@xxxxxxx> # mm part > > because i am not familiar with the drm code to ack any changes there. Got it. Thanks.
