Re: [PATCH 4/5] dax: use sb_issue_zerout instead of calling dax_clear_sectors

On Mon, 2016-03-28 at 16:34 -0700, Dan Williams wrote: <> > Seems kind of sad to fail the fault due to a bad block when we were > going to zero it anyway, right? I'm not seeing a compelling reason to > keep any zeroing in fs/dax.c. Agreed - but how do we do this? clear_pmem needs to be able to clear an arbitrary number of bytes, but to go through the driver, we'd need to send down a bio? If only the driver had an rw_bytes like interface that could be used by anyone... :)