On Tue, May 07, 2024 at 05:06:57PM +0800, Kefeng Wang wrote:
> > +static void filemap_lruvec_stat_update(struct mem_cgroup *memcg,
> > + pg_data_t *pgdat, int nr)
> > +{
> > + struct lruvec *lruvec;
> > +
> > + if (!memcg) {
> > + __mod_node_page_state(pgdat, NR_FILE_MAPPED, nr);
> > + return;
> > + }
> > +
> > + lruvec = mem_cgroup_lruvec(memcg, pgdat);
> > + __mod_lruvec_state(lruvec, NR_FILE_MAPPED, nr);
> > +}
> > +
> > vm_fault_t filemap_map_pages(struct vm_fault *vmf,
> > pgoff_t start_pgoff, pgoff_t end_pgoff)
> > {
> > @@ -3628,6 +3642,9 @@ vm_fault_t filemap_map_pages(struct vm_fault *vmf,
> > vm_fault_t ret = 0;
> > unsigned long rss = 0;
> > unsigned int nr_pages = 0, mmap_miss = 0, mmap_miss_saved, folio_type;
> > + struct mem_cgroup *memcg, *memcg_cur;
> > + pg_data_t *pgdat, *pgdat_cur;
> > + int nr_mapped = 0;
> >
> > rcu_read_lock();
> > folio = next_uptodate_folio(&xas, mapping, end_pgoff);
> > @@ -3648,9 +3665,20 @@ vm_fault_t filemap_map_pages(struct vm_fault *vmf,
> > }
> >
> > folio_type = mm_counter_file(folio);
> > + memcg = folio_memcg(folio);
> > + pgdat = folio_pgdat(folio);
You should be able to do:
lruvec = folio_lruvec(folio);
and then pass that directly to filemap_lruvec_stat_update().
