From: Dan Smith <danms@xxxxxxxxxx> Subject: Re: Latest dm-userspace kernel code Date: Sat, 30 Sep 2006 08:46:10 -0700 > FT> I thought that dm-userpsace supports a feature to map a single > FT> request to multiple devices for kinda raid. For that, I guess that > FT> struct dmu_msg_map_response includes several sets of dst_maj and > FT> dst_min. Or you might use 'linked' dmu_msg_map_response, which > FT> enables a user-space daemon to send multiple dmu_msg_map_responses > FT> for one dmu_msg_map_request (if a dmu_msg_map_response is marked > FT> 'linked', dm-userspace module clones the bio and does not free > FT> struct the dmu_request). > > Hmm, I had not planned to implement this kind of behavior, but I can > see the benefit. I think it would be best to focus on performance for > now and add that capability later. As I said before, once the code is merged into mainline (hopefully), you cannot touch dm-usersapce.h. So at least, you need to have a proper kernel/user interface for possible features. OK. Let me work on this. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
