aboutsummaryrefslogtreecommitdiffstats
path: root/fs
diff options
context:
space:
mode:
authorMatthew Wilcox <willy@linux.intel.com>2015-09-08 14:59:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-08 15:35:28 -0700
commite676a4c191653787c3fe851fe3b9f1f33d49dac2 (patch)
tree5b83a284b5a4fbe41da5a34f0e321e09e0d4c188 /fs
parentdd8a2b6c29a3221c19ab475c8408fc2b914ccfab (diff)
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/ext4/file.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 953d519e799c..ca5302a256ea 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 = {

Privacy Policy