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LKm6qXNKAE/wDB/lxv4p3lxfmP/03XQId507KEeNEDbLKDFD1CzYGYWHuWE7VVmE96TUfnA53LqVcU40M7y6FvuYpa7p97CX+sb7TAloH8/XJRYOXTtm91wUlxslLOGwaFRftKmBsVxwLl+vft7zbbHSXTMDBeAm6VsKhM42nBf20wGUbzIP04glfl4Ciz9eArdkLUH5ISkve5/GSm4rjh3/e6lfRI/3Rz97kqXjbdGqh2j9kMogQJC3aXFryjRXBP59TE6bqn0DTbr13jcYFDTTegdPfV7nQ9QiUH/WTtbQJOL+m8QBSvJLQbEKg28YEhFRTJGpclwwIm+ZXD/TOkxmM3Tg6mjXg6SXG9Gh7AhzoTLup5EAFHTbKUQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 12/4/23 22:21, David Hildenbrand wrote: > Let's make sure we end up with the right folios in the right functions. > > Signed-off-by: David Hildenbrand Reviewed-by: Yin Fengwei > --- > include/linux/rmap.h | 7 +++++++ > mm/rmap.c | 6 ++++++ > 2 files changed, 13 insertions(+) > > diff --git a/include/linux/rmap.h b/include/linux/rmap.h > index 3f38141b53b9d..77e336f86c72d 100644 > --- a/include/linux/rmap.h > +++ b/include/linux/rmap.h > @@ -212,6 +212,7 @@ void hugetlb_add_new_anon_rmap(struct folio *, struct vm_area_struct *, > static inline int hugetlb_try_dup_anon_rmap(struct folio *folio, > struct vm_area_struct *vma) > { > + VM_WARN_ON_FOLIO(!folio_test_hugetlb(folio), folio); > VM_WARN_ON_FOLIO(!folio_test_anon(folio), folio); > > if (PageAnonExclusive(&folio->page)) { > @@ -226,6 +227,7 @@ static inline int hugetlb_try_dup_anon_rmap(struct folio *folio, > /* See page_try_share_anon_rmap() */ > static inline int hugetlb_try_share_anon_rmap(struct folio *folio) > { > + VM_WARN_ON_FOLIO(!folio_test_hugetlb(folio), folio); > VM_WARN_ON_FOLIO(!folio_test_anon(folio), folio); > VM_WARN_ON_FOLIO(!PageAnonExclusive(&folio->page), folio); > > @@ -245,6 +247,7 @@ static inline int hugetlb_try_share_anon_rmap(struct folio *folio) > > static inline void hugetlb_add_file_rmap(struct folio *folio) > { > + VM_WARN_ON_FOLIO(!folio_test_hugetlb(folio), folio); > VM_WARN_ON_FOLIO(folio_test_anon(folio), folio); > > atomic_inc(&folio->_entire_mapcount); > @@ -252,11 +255,15 @@ static inline void hugetlb_add_file_rmap(struct folio *folio) > > static inline void hugetlb_remove_rmap(struct folio *folio) > { > + VM_WARN_ON_FOLIO(!folio_test_hugetlb(folio), folio); > + > atomic_dec(&folio->_entire_mapcount); > } > > static inline void __page_dup_rmap(struct page *page, bool compound) > { > + VM_WARN_ON(folio_test_hugetlb(page_folio(page))); > + > if (compound) { > struct folio *folio = (struct folio *)page; > > diff --git a/mm/rmap.c b/mm/rmap.c > index 2f1af3958e687..a735ecca47a81 100644 > --- a/mm/rmap.c > +++ b/mm/rmap.c > @@ -1313,6 +1313,7 @@ void folio_add_new_anon_rmap(struct folio *folio, struct vm_area_struct *vma, > { > int nr; > > + VM_WARN_ON_FOLIO(folio_test_hugetlb(folio), folio); > VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma); > __folio_set_swapbacked(folio); > > @@ -1353,6 +1354,7 @@ void folio_add_file_rmap_range(struct folio *folio, struct page *page, > unsigned int nr_pmdmapped = 0, first; > int nr = 0; > > + VM_WARN_ON_FOLIO(folio_test_hugetlb(folio), folio); > VM_WARN_ON_FOLIO(compound && !folio_test_pmd_mappable(folio), folio); > > /* Is page being mapped by PTE? Is this its first map to be added? */ > @@ -1438,6 +1440,7 @@ void page_remove_rmap(struct page *page, struct vm_area_struct *vma, > bool last; > enum node_stat_item idx; > > + VM_WARN_ON_FOLIO(folio_test_hugetlb(folio), folio); > VM_BUG_ON_PAGE(compound && !PageHead(page), page); > > /* Is page being unmapped by PTE? Is this its last map to be removed? */ > @@ -2590,6 +2593,7 @@ void rmap_walk_locked(struct folio *folio, struct rmap_walk_control *rwc) > void hugetlb_add_anon_rmap(struct folio *folio, struct vm_area_struct *vma, > unsigned long address, rmap_t flags) > { > + VM_WARN_ON_FOLIO(!folio_test_hugetlb(folio), folio); > VM_WARN_ON_FOLIO(!folio_test_anon(folio), folio); > > atomic_inc(&folio->_entire_mapcount); > @@ -2602,6 +2606,8 @@ void hugetlb_add_anon_rmap(struct folio *folio, struct vm_area_struct *vma, > void hugetlb_add_new_anon_rmap(struct folio *folio, > struct vm_area_struct *vma, unsigned long address) > { > + VM_WARN_ON_FOLIO(!folio_test_hugetlb(folio), folio); > + > BUG_ON(address < vma->vm_start || address >= vma->vm_end); > /* increment count (starts at -1) */ > atomic_set(&folio->_entire_mapcount, 0);