| Message ID | 20230929114421.3761121-2-ryan.roberts@arm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | variable-order, large folios for anonymous memory | expand |
On 29.09.23 13:44, Ryan Roberts wrote: > In preparation for the introduction of large folios for anonymous > memory, we would like to be able to split them when they have unmapped > subpages, in order to free those unused pages under memory pressure. So > remove the artificial requirement that the large folio needed to be at > least PMD-sized. > > Reviewed-by: Yu Zhao <yuzhao@google.com> > Reviewed-by: Yin Fengwei <fengwei.yin@intel.com> > Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> > Reviewed-by: David Hildenbrand <david@redhat.com> > Signed-off-by: Ryan Roberts <ryan.roberts@arm.com> > --- > mm/rmap.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/mm/rmap.c b/mm/rmap.c > index 9f795b93cf40..8600bd029acf 100644 > --- a/mm/rmap.c > +++ b/mm/rmap.c > @@ -1446,11 +1446,11 @@ void page_remove_rmap(struct page *page, struct vm_area_struct *vma, > __lruvec_stat_mod_folio(folio, idx, -nr); > > /* > - * Queue anon THP for deferred split if at least one > + * Queue anon large folio for deferred split if at least one > * page of the folio is unmapped and at least one page > * is still mapped. > */ > - if (folio_test_pmd_mappable(folio) && folio_test_anon(folio)) > + if (folio_test_large(folio) && folio_test_anon(folio)) > if (!compound || nr < nr_pmdmapped) > deferred_split_folio(folio); > } This patch can be picked up early I think.
diff --git a/mm/rmap.c b/mm/rmap.c index 9f795b93cf40..8600bd029acf 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1446,11 +1446,11 @@ void page_remove_rmap(struct page *page, struct vm_area_struct *vma, __lruvec_stat_mod_folio(folio, idx, -nr); /* - * Queue anon THP for deferred split if at least one + * Queue anon large folio for deferred split if at least one * page of the folio is unmapped and at least one page * is still mapped. */ - if (folio_test_pmd_mappable(folio) && folio_test_anon(folio)) + if (folio_test_large(folio) && folio_test_anon(folio)) if (!compound || nr < nr_pmdmapped) deferred_split_folio(folio); }