diff options
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/mm/memory.c b/mm/memory.c index 2366578015ad..3ccee51adfbb 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4181,11 +4181,6 @@ fallback: return __alloc_swap_folio(vmf); } #else /* !CONFIG_TRANSPARENT_HUGEPAGE */ -static inline bool can_swapin_thp(struct vm_fault *vmf, pte_t *ptep, int nr_pages) -{ - return false; -} - static struct folio *alloc_swap_folio(struct vm_fault *vmf) { return __alloc_swap_folio(vmf); @@ -4925,6 +4920,15 @@ vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page) pmd_t entry; vm_fault_t ret = VM_FAULT_FALLBACK; + /* + * It is too late to allocate a small folio, we already have a large + * folio in the pagecache: especially s390 KVM cannot tolerate any + * PMD mappings, but PTE-mapped THP are fine. So let's simply refuse any + * PMD mappings if THPs are disabled. + */ + if (thp_disabled_by_hw() || vma_thp_disabled(vma, vma->vm_flags)) + return ret; + if (!thp_vma_suitable_order(vma, haddr, PMD_ORDER)) return ret; @@ -6346,7 +6350,8 @@ static inline void pfnmap_args_setup(struct follow_pfnmap_args *args, static inline void pfnmap_lockdep_assert(struct vm_area_struct *vma) { #ifdef CONFIG_LOCKDEP - struct address_space *mapping = vma->vm_file->f_mapping; + struct file *file = vma->vm_file; + struct address_space *mapping = file ? file->f_mapping : NULL; if (mapping) lockdep_assert(lockdep_is_held(&vma->vm_file->f_mapping->i_mmap_rwsem) || |