On Mon, May 02, 2022 at 02:57:46PM +1000, NeilBrown wrote: > @@ -390,9 +392,9 @@ static void sio_read_complete(struct kiocb *iocb, long ret) > struct page *page = sio->bvec[p].bv_page; > > SetPageUptodate(page); > + count_swpout_vm_event(page); > unlock_page(page); > } > - count_vm_events(PSWPIN, sio->pages); Surely that should be count_swpIN_vm_event?