Messages in this thread Patch in this message | | | From | Willy Tarreau <> | Subject | [PATCH 3.10 154/319] ext4: allow DAX writeback for hole punch | Date | Sun, 5 Feb 2017 20:19:36 +0100 |
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From: Ross Zwisler <ross.zwisler@linux.intel.com>
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: Willy Tarreau <w@1wt.eu> --- fs/ext4/inode.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index a187055..31179ba 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3610,7 +3610,7 @@ int ext4_can_truncate(struct inode *inode) } /* - * 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 @@ -3646,7 +3646,7 @@ int ext4_punch_hole(struct file *file, 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) -- 2.8.0.rc2.1.gbe9624a
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