A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?
On Mon, Jul 30, 2018 at 09:42:27PM +0800, weiqi (C) wrote: > in latest linux kernel version, load-balance's detach_tasks() keeps > "load/2" behavior: > > """ > > if (( load / 2 ) > env->imbalance) > goto next; > """ > > It means a task "p", which load is 1.5 times than "env->imbalance" can > move from "src_rq" to "dst_rq". > after this move, imbalance between "src_rq" and "dst_rq" may larger than > before. imbalance is how much we should move to get in balance. So if we move 1 imbalance we'll end up being just right. If we move 1.5 we end up slightly better then before, but imbalanced the other way. If we move 2 imbalance, we're exactly where we were, just the other way around. > but if use "load*2" here, It means we can pick a task "p" , which load is > half of "env->imbalance"， and after move， > "src_rq" and "dst_rq" is balanced. We might not move anything and not improve even if we could.
