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| author | Matthew Wilcox <willy@linux.intel.com> | 2015-09-08 14:59:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-08 15:35:28 -0700 |
| commit | e676a4c191653787c3fe851fe3b9f1f33d49dac2 (patch) | |
| tree | 5b83a284b5a4fbe41da5a34f0e321e09e0d4c188 | |
| parent | dd8a2b6c29a3221c19ab475c8408fc2b914ccfab (diff) | |
| download | x86-pkeys-e676a4c191653787c3fe851fe3b9f1f33d49dac2.tar.gz | |
ext4: use ext4_get_block_write() for DAX
DAX relies on the get_block function either zeroing newly allocated
blocks before they're findable by subsequent calls to get_block, or
marking newly allocated blocks as unwritten. ext4_get_block() cannot
create unwritten extents, but ext4_get_block_write() can.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Reported-by: Andy Rudoff <andy.rudoff@intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/ext4/file.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 953d519e799c07..ca5302a256ead2 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -196,7 +196,7 @@ out: static void ext4_end_io_unwritten(struct buffer_head *bh, int uptodate) { struct inode *inode = bh->b_assoc_map->host; - /* XXX: breaks on 32-bit > 16GB. Is that even supported? */ + /* XXX: breaks on 32-bit > 16TB. Is that even supported? */ loff_t offset = (loff_t)(uintptr_t)bh->b_private << inode->i_blkbits; int err; if (!uptodate) @@ -207,8 +207,7 @@ static void ext4_end_io_unwritten(struct buffer_head *bh, int uptodate) static int ext4_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { - return dax_fault(vma, vmf, ext4_get_block, ext4_end_io_unwritten); - /* Is this the right get_block? */ + 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, @@ -220,7 +219,8 @@ static int ext4_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, 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); + return dax_mkwrite(vma, vmf, ext4_get_block_write, + ext4_end_io_unwritten); } static const struct vm_operations_struct ext4_dax_vm_ops = { |