On Mon, Jul 05, 2021 at 08:18:24PM +0200, Andreas Gruenbacher wrote:

Create an iop in the writeback path if one doesn't exist.  This allows
us to avoid creating the iop in some cases.  The only current case we
do that for is pages with inline data, but it can be extended to pages
which are entirely within an extent.  It also allows for an iop to be
removed from pages in the future (eg page split).

Co-developed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>