[PATCH 09/10] ext4: Huge page fault support
From: Matthew Wilcox <hidden>
Date: 2015-07-10 20:29:24
Also in:
linux-fsdevel, lkml
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
From: Matthew Wilcox <redacted> Use DAX to provide support for huge pages. Signed-off-by: Matthew Wilcox <redacted> --- fs/ext4/file.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 34d814f..ca5302a 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c@@ -210,6 +210,13 @@ static int ext4_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) return dax_fault(vma, vmf, ext4_get_block_write, ext4_end_io_unwritten); } +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_write,
@@ -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; }
--
2.1.4
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