ext2: huge page fault support
Use DAX to provide support for huge pages. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Cc: Hillf Danton <dhillf@gmail.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -32,6 +32,12 @@ static int ext2_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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return dax_fault(vma, vmf, ext2_get_block, NULL);
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}
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static int ext2_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr,
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pmd_t *pmd, unsigned int flags)
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{
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return dax_pmd_fault(vma, addr, pmd, flags, ext2_get_block, NULL);
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}
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static int ext2_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
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{
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return dax_mkwrite(vma, vmf, ext2_get_block, NULL);
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@ -39,6 +45,7 @@ static int ext2_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
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static const struct vm_operations_struct ext2_dax_vm_ops = {
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.fault = ext2_dax_fault,
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.pmd_fault = ext2_dax_pmd_fault,
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.page_mkwrite = ext2_dax_mkwrite,
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.pfn_mkwrite = dax_pfn_mkwrite,
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};
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@ -50,7 +57,7 @@ static int ext2_file_mmap(struct file *file, struct vm_area_struct *vma)
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file_accessed(file);
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vma->vm_ops = &ext2_dax_vm_ops;
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vma->vm_flags |= VM_MIXEDMAP;
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vma->vm_flags |= VM_MIXEDMAP | VM_HUGEPAGE;
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return 0;
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}
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#else
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