On Wed, Dec 10, 2014 at 10:31:31PM +0900, Akira Hayakawa wrote: > Joe, > > > So you copy the bio payload to a different block of ram and then > > complete the bio? Or does the rambuf refer to the bio payload > > directly? > Good question. > The answer is, copy the data (got by bio_data(bio)) to rambuf once > and ack if it's not barrier things. > It would be nice if data in rambuf points to bio payload but it now copies > because bio payload can be reused after completion. Am I right? > Is there a way of eliminate memory copying? You *have* to eliminate this memory copying. Remap the bios to the relevant portion of your log, and don't complete them until you log chunk is coherent. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
