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| author | Matthew Wilcox <willy@linux.intel.com> | 2015-09-08 14:59:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-08 15:35:28 -0700 |
| commit | 11bd1a9ecdd687b8a4b9b360b7e4b74a1a5e2bd5 (patch) | |
| tree | ec2a3ea303b1ac4ef5d65305a5c1bbedb2fad5b1 /fs/ext4 | |
| parent | e7b1ea2ad6581b83f63246db48aa2c2c9bf2ec8d (diff) | |
| download | lwn-11bd1a9ecdd687b8a4b9b360b7e4b74a1a5e2bd5.tar.gz lwn-11bd1a9ecdd687b8a4b9b360b7e4b74a1a5e2bd5.zip | |
ext4: 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>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/file.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index f8a631047379..953d519e799c 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -211,6 +211,13 @@ static int ext4_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) /* Is this the right get_block? */ } +static int ext4_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, ext4_get_block_write, + ext4_end_io_unwritten); +} + static int ext4_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) { return dax_mkwrite(vma, vmf, ext4_get_block, ext4_end_io_unwritten); @@ -218,6 +225,7 @@ static int ext4_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) static const struct vm_operations_struct ext4_dax_vm_ops = { .fault = ext4_dax_fault, + .pmd_fault = ext4_dax_pmd_fault, .page_mkwrite = ext4_dax_mkwrite, .pfn_mkwrite = dax_pfn_mkwrite, }; @@ -245,7 +253,7 @@ static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma) file_accessed(file); if (IS_DAX(file_inode(file))) { vma->vm_ops = &ext4_dax_vm_ops; - vma->vm_flags |= VM_MIXEDMAP; + vma->vm_flags |= VM_MIXEDMAP | VM_HUGEPAGE; } else { vma->vm_ops = &ext4_file_vm_ops; } |