> James Bottomley wrote: > > Well ... while I've got your attention, the only complexity I see to > > converting sg is the hd->iovec_count != 0 case, which is doing vectored > > SG from user land. > > > > This can be implemented (basically you do multiple bio attachment to a > > request), and probably in the block layer (since block SG_IO would then > > pick up the capability). > > > > How important is this functionality? Are there any applications using > > it? > > I don't think it is important and I'm not aware of any > real world applications that are using it. Naturally, > I will find out if that is actually true after it > gets removed. My company (Cybernetics) sells several products that run embedded Linux which use the userspace scatter-gather capability of the SG driver. They are still running the 2.4 kernel series, but we will probably switch to 2.6 at some point. Anthony J. Battersby Cybernetics
