I would like to increase the performance of the multibus mode of multipath. It would be nice if multibus performance would be very close to accessing the device directly. From what I have been told, under multibus, I/O's are broken up into bio's and sent down the multiple paths, with no merging of adjacent I/O's. Would it be possible to add code to the kernel so that adjacent (at least some of them, probably make configurable) would be merged and sent on a single path? And, would this increase the performance of multibus mode? I would be willing to work on it myself, but I have never done any kernel coding (I done plenty of C coding) and would not know where to look to even attempt adding I/O merging to multipath. What do you think? Would this work, and how would I go about doing it? Andy -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
