PGPGOUT
mem_data->pgpgout = ev[PGPGOUT] >> 1;
count_vm_events(PGPGOUT, bio_sectors(bio));
PGPGOUT,
count_memcg_events(memcg, PGPGOUT, 1);
count_memcg_events(memcg, PGPGOUT, pgpgout);
memcg_vm_event_stat[i] == PGPGOUT)
PGPGOUT,
[I(PGPGOUT)] = "pgpgout",
v[PGPGOUT] /= 2;