The patch titled
Subject: xfs: huge page fault support
has been added to the -mm tree. Its filename is
xfs-huge-page-fault-support.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/xfs-huge-page-fault-support.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/xfs-huge-page-fault-support.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Subject: xfs: 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/xfs/xfs_file.c | 30 +++++++++++++++++++++++++++++-
fs/xfs/xfs_trace.h | 1 +
2 files changed, 30 insertions(+), 1 deletion(-)
diff -puN fs/xfs/xfs_file.c~xfs-huge-page-fault-support fs/xfs/xfs_file.c
--- a/fs/xfs/xfs_file.c~xfs-huge-page-fault-support
+++ a/fs/xfs/xfs_file.c
@@ -1530,8 +1530,36 @@ xfs_filemap_fault(
return ret;
}
+STATIC int
+xfs_filemap_pmd_fault(
+ struct vm_area_struct *vma,
+ unsigned long addr,
+ pmd_t *pmd,
+ unsigned int flags)
+{
+ struct inode *inode = file_inode(vma->vm_file);
+ struct xfs_inode *ip = XFS_I(inode);
+ int ret;
+
+ if (!IS_DAX(inode))
+ return VM_FAULT_FALLBACK;
+
+ trace_xfs_filemap_pmd_fault(ip);
+
+ sb_start_pagefault(inode->i_sb);
+ file_update_time(vma->vm_file);
+ xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
+ ret = __dax_pmd_fault(vma, addr, pmd, flags, xfs_get_blocks_direct,
+ xfs_end_io_dax_write);
+ xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
+ sb_end_pagefault(inode->i_sb);
+
+ return ret;
+}
+
static const struct vm_operations_struct xfs_file_vm_ops = {
.fault = xfs_filemap_fault,
+ .pmd_fault = xfs_filemap_pmd_fault,
.map_pages = filemap_map_pages,
.page_mkwrite = xfs_filemap_page_mkwrite,
};
@@ -1544,7 +1572,7 @@ xfs_file_mmap(
file_accessed(filp);
vma->vm_ops = &xfs_file_vm_ops;
if (IS_DAX(file_inode(filp)))
- vma->vm_flags |= VM_MIXEDMAP;
+ vma->vm_flags |= VM_MIXEDMAP | VM_HUGEPAGE;
return 0;
}
diff -puN fs/xfs/xfs_trace.h~xfs-huge-page-fault-support fs/xfs/xfs_trace.h
--- a/fs/xfs/xfs_trace.h~xfs-huge-page-fault-support
+++ a/fs/xfs/xfs_trace.h
@@ -687,6 +687,7 @@ DEFINE_INODE_EVENT(xfs_inode_clear_eofbl
DEFINE_INODE_EVENT(xfs_inode_free_eofblocks_invalid);
DEFINE_INODE_EVENT(xfs_filemap_fault);
+DEFINE_INODE_EVENT(xfs_filemap_pmd_fault);
DEFINE_INODE_EVENT(xfs_filemap_page_mkwrite);
DECLARE_EVENT_CLASS(xfs_iref_class,
_
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
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
