The patch titled
Subject: ext2: huge page fault support
has been added to the -mm tree. Its filename is
ext2-huge-page-fault-support.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ext2-huge-page-fault-support.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ext2-huge-page-fault-support.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
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------------------------------------------------------
From: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Subject: ext2: huge page fault support
Use DAX to provide support for huge pages.
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Cc: Hillf Danton <dhillf@xxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Theodore Ts'o <tytso@xxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ext2/file.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff -puN fs/ext2/file.c~ext2-huge-page-fault-support fs/ext2/file.c
--- a/fs/ext2/file.c~ext2-huge-page-fault-support
+++ a/fs/ext2/file.c
@@ -32,6 +32,12 @@ static int ext2_dax_fault(struct vm_area
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)
{
return dax_mkwrite(vma, vmf, ext2_get_block, NULL);
@@ -39,6 +45,7 @@ static int ext2_dax_mkwrite(struct vm_ar
static const struct vm_operations_struct ext2_dax_vm_ops = {
.fault = ext2_dax_fault,
+ .pmd_fault = ext2_dax_pmd_fault,
.page_mkwrite = ext2_dax_mkwrite,
.pfn_mkwrite = dax_pfn_mkwrite,
};
@@ -50,7 +57,7 @@ static int ext2_file_mmap(struct file *f
file_accessed(file);
vma->vm_ops = &ext2_dax_vm_ops;
- vma->vm_flags |= VM_MIXEDMAP;
+ vma->vm_flags |= VM_MIXEDMAP | VM_HUGEPAGE;
return 0;
}
#else
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxxxx are
mm-make-gup-handle-pfn-mapping-unless-foll_get-is-requested.patch
dax-move-dax-related-functions-to-a-new-header.patch
thp-prepare-for-dax-huge-pages.patch
mm-add-a-pmd_fault-handler.patch
mm-export-various-functions-for-the-benefit-of-dax.patch
mm-add-vmf_insert_pfn_pmd.patch
dax-add-huge-page-fault-support.patch
ext2-huge-page-fault-support.patch
ext4-huge-page-fault-support.patch
xfs-huge-page-fault-support.patch
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