Re: [PATCH v2 1/9] ext4: allow DAX writeback for hole punch

2016-09-22 Thread Theodore Ts'o
On Wed, Sep 21, 2016 at 09:22:44AM -0600, Ross Zwisler wrote: > > Ted & Jan, > > I'm still working on the latest version of the PMD work which integrates with > the new struct iomap faults. At this point it doesn't look like I'm going to > make v4.9, but I think that this bug fix at least

Re: [PATCH v2 1/9] ext4: allow DAX writeback for hole punch

2016-09-21 Thread Ross Zwisler
On Tue, Aug 23, 2016 at 04:04:11PM -0600, Ross Zwisler wrote: > 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