Hi,

Going over this a bit, an deviant from the original design of
elevator_linus seems to have snuck in. Well, almost, I've been aware of
this for some time...

The idea was _not_ to account request merges, since they will (in by far
the most cases) incur the cost of a seek. Instead we just account seeks,
any seek (and please don't start a debate on short vs long seeks again,
I'm not listening). The attached patch corrects this, and also corrects
the initial sequence numbers (typically this would be sequence / 8
number of seeks allowed to pass a request now).

I'll do some formal timing on this later.

-- 
Jens Axboe