| From | "Kirill A. Shutemov" <> | Subject | Re: [PATCHv2, RFC 25/30] thp, mm: basic huge_fault implementation for generic_file_vm_ops | Date | Fri, 15 Mar 2013 15:30:42 +0200 (EET) |
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Hillf Danton wrote: > On Fri, Mar 15, 2013 at 1:50 AM, Kirill A. Shutemov > <kirill.shutemov@linux.intel.com> wrote: > > > > +#ifdef CONFIG_TRANSPARENT_HUGEPAGE > > +static int filemap_huge_fault(struct vm_area_struct *vma, struct vm_fault *vmf) > > +{ > > + struct file *file = vma->vm_file; > > + struct address_space *mapping = file->f_mapping; > > + struct inode *inode = mapping->host; > > + pgoff_t size, offset = vmf->pgoff; > > + unsigned long address = (unsigned long) vmf->virtual_address; > > + struct page *page; > > + int ret = 0; > > + > > + BUG_ON(((address >> PAGE_SHIFT) & HPAGE_CACHE_INDEX_MASK) != > > + (offset & HPAGE_CACHE_INDEX_MASK)); > > + > > +retry: > > + page = find_get_page(mapping, offset); > > + if (!page) { > > + gfp_t gfp_mask = mapping_gfp_mask(mapping) | __GFP_COLD; > > + page = alloc_pages(gfp_mask, HPAGE_PMD_ORDER); > s/pages/pages_vma/ ?
Fixed. Thanks.
> > + if (!page) { > > + count_vm_event(THP_FAULT_FALLBACK); > > + return VM_FAULT_OOM; > > + }
-- Kirill A. Shutemov
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