On Fri, May 15, 2009 at 12:09:21PM +0900, Kiyoshi Ueda wrote: > However, if I limit the 'perf' value in smaller range (e.g. 0 to 100), > such overflow shouldn't happen. So I should be able to use > multiplication. Also, I don't need to use size_t for 'perf', > because 'unsinged' should be enough for such small values. I think a small range would be adequate - look at the number sizes and go 0-100 or 0-1000 as appropriate. Thinking of naming, is it 'relative_throughput' ? However, is it also going to be possible to extend this target to measure the the actual throughput? If we did that, would we use a special value to indicate it or add a new table parameter and keep the 'perf' ones as a manual adjustment factor applied on top of the calculated one? Alasdair -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel