On Thu, Mar 4, 2021 at 4:01 PM Dave Hansen <[email protected]> wrote: > > > From: Yang Shi <[email protected]> > > Account the number of demoted pages into reclaim_state->nr_demoted. > > Add pgdemote_kswapd and pgdemote_direct VM counters showed in > /proc/vmstat. > > [ daveh: > - __count_vm_events() a bit, and made them look at the THP > size directly rather than getting data from migrate_pages() > ] > > Signed-off-by: Yang Shi <[email protected]> > Signed-off-by: Dave Hansen <[email protected]> > Cc: David Rientjes <[email protected]> > Cc: Huang Ying <[email protected]> > Cc: Dan Williams <[email protected]> > Cc: David Hildenbrand <[email protected]> > Cc: osalvador <[email protected]> > > -- > > Changes since 202010: > * remove unused scan-control 'demoted' field
Reviewed-by: Yang Shi <[email protected]> > --- > > b/include/linux/vm_event_item.h | 2 ++ > b/mm/vmscan.c | 5 +++++ > b/mm/vmstat.c | 2 ++ > 3 files changed, 9 insertions(+) > > diff -puN include/linux/vm_event_item.h~mm-vmscan-add-page-demotion-counter > include/linux/vm_event_item.h > --- a/include/linux/vm_event_item.h~mm-vmscan-add-page-demotion-counter > 2021-03-04 15:35:57.698806425 -0800 > +++ b/include/linux/vm_event_item.h 2021-03-04 15:35:57.719806425 -0800 > @@ -33,6 +33,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PS > PGREUSE, > PGSTEAL_KSWAPD, > PGSTEAL_DIRECT, > + PGDEMOTE_KSWAPD, > + PGDEMOTE_DIRECT, > PGSCAN_KSWAPD, > PGSCAN_DIRECT, > PGSCAN_DIRECT_THROTTLE, > diff -puN mm/vmscan.c~mm-vmscan-add-page-demotion-counter mm/vmscan.c > --- a/mm/vmscan.c~mm-vmscan-add-page-demotion-counter 2021-03-04 > 15:35:57.700806425 -0800 > +++ b/mm/vmscan.c 2021-03-04 15:35:57.724806425 -0800 > @@ -1118,6 +1118,11 @@ static unsigned int demote_page_list(str > target_nid, MIGRATE_ASYNC, MR_DEMOTION, > &nr_succeeded); > > + if (current_is_kswapd()) > + __count_vm_events(PGDEMOTE_KSWAPD, nr_succeeded); > + else > + __count_vm_events(PGDEMOTE_DIRECT, nr_succeeded); > + > return nr_succeeded; > } > > diff -puN mm/vmstat.c~mm-vmscan-add-page-demotion-counter mm/vmstat.c > --- a/mm/vmstat.c~mm-vmscan-add-page-demotion-counter 2021-03-04 > 15:35:57.708806425 -0800 > +++ b/mm/vmstat.c 2021-03-04 15:35:57.726806425 -0800 > @@ -1244,6 +1244,8 @@ const char * const vmstat_text[] = { > "pgreuse", > "pgsteal_kswapd", > "pgsteal_direct", > + "pgdemote_kswapd", > + "pgdemote_direct", > "pgscan_kswapd", > "pgscan_direct", > "pgscan_direct_throttle", > _ >
