On Sat, Jan 09, 2016 at 07:21:12PM -0600, Mike Christie wrote: > Oh yeah, to answer the second part of your question, REQ_OP_FLUSH is > only a flush operation like what request_fn drivers wanted. And that's the odd part that trips me up. > > REQ_PREFLUSH can be set with a REQ_OP_WRITE bio when filesystems want to > do both. > > There is then the case where filesystems and blkdev_issue_flush could > just want to request a flush. I left them as a REQ_PREFLUSH with > REQ_OP_WRITE set, so there would be a single code path. But the pure flush without data transfer case is pretty different, so it seems rather odd to handle it like that. But I suspec we could just fix that up later. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
