On Wed, Mar 03, 2021 at 09:57:48AM +0000, ruansy.f...@fujitsu.com wrote: > > What is the advantage of the ioemap_end handler here? It adds another > > indirect funtion call to the fast path, so if we can avoid it, I'd > > rather do that. > > These code were in xfs_file_dax_write(). I moved them into the iomap_end > because the mmaped CoW need this. > > I know this is not so good, but I could not find another better way. Do you > have any ideas?
mmaped copy is the copy_edge case? Maybe just use different iomap_ops for that case vs plain write?
