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ext2: huge page fault support

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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>
This commit is contained in:
Matthew Wilcox 2015-09-08 14:59:00 -07:00 committed by Linus Torvalds
parent 844f35db10
commit e7b1ea2ad6
1 changed files with 8 additions and 1 deletions
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9
fs/ext2/file.c
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@ -32,6 +32,12 @@ static int ext2_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
return dax_fault(vma, vmf, ext2_get_block, NULL); return dax_fault(vma, vmf, ext2_get_block, NULL);
} }
static int ext2_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr,
pmd_t *pmd, unsigned int flags)
{
return dax_pmd_fault(vma, addr, pmd, flags, ext2_get_block, NULL);
}
static int ext2_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) static int ext2_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
{ {
return dax_mkwrite(vma, vmf, ext2_get_block, NULL); return dax_mkwrite(vma, vmf, ext2_get_block, NULL);
@ -39,6 +45,7 @@ static int ext2_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
static const struct vm_operations_struct ext2_dax_vm_ops = { static const struct vm_operations_struct ext2_dax_vm_ops = {
.fault = ext2_dax_fault, .fault = ext2_dax_fault,
.pmd_fault = ext2_dax_pmd_fault,
.page_mkwrite = ext2_dax_mkwrite, .page_mkwrite = ext2_dax_mkwrite,
.pfn_mkwrite = dax_pfn_mkwrite, .pfn_mkwrite = dax_pfn_mkwrite,
}; };
@ -50,7 +57,7 @@ static int ext2_file_mmap(struct file *file, struct vm_area_struct *vma)
file_accessed(file); file_accessed(file);
vma->vm_ops = &ext2_dax_vm_ops; vma->vm_ops = &ext2_dax_vm_ops;
vma->vm_flags |= VM_MIXEDMAP; vma->vm_flags |= VM_MIXEDMAP | VM_HUGEPAGE;
return 0; return 0;
} }
#else #else