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| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2016-09-22 11:49:38 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-22 12:06:49 +0200 |
| commit | e54ffbb9b42d55340d7f3da69c15f857eb748aa3 (patch) | |
| tree | 28f6d768b4b951bfe995f44f1cd2021929e55ad6 | |
| parent | befb1bb64bbd3f5b9699661c28a1450b43aa2e33 (diff) | |
| download | linux-stable-e54ffbb9b42d55340d7f3da69c15f857eb748aa3.tar.gz linux-stable-e54ffbb9b42d55340d7f3da69c15f857eb748aa3.tar.bz2 linux-stable-e54ffbb9b42d55340d7f3da69c15f857eb748aa3.zip | |
ext4: allow DAX writeback for hole punch
commit cca32b7eeb4ea24fa6596650e06279ad9130af98 upstream.
Currently when doing a DAX hole punch with ext4 we fail to do a writeback.
This is because the logic around filemap_write_and_wait_range() in
ext4_punch_hole() only looks for dirty page cache pages in the radix tree,
not for dirty DAX exceptional entries.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/ext4/inode.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 0dbe87a0d1e5..19acefad10b2 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3892,7 +3892,7 @@ int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset, } /* - * ext4_punch_hole: punches a hole in a file by releaseing the blocks + * ext4_punch_hole: punches a hole in a file by releasing the blocks * associated with the given offset and length * * @inode: File inode @@ -3921,7 +3921,7 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length) * Write out all dirty pages to avoid race conditions * Then release them. */ - if (mapping->nrpages && mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) { + if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) { ret = filemap_write_and_wait_range(mapping, offset, offset + length - 1); if (ret) |