[PATCH] iosched: Add i10 I/O Scheduler

[Sagi Grimberg]

>> But if you think this has a better home, I'm assuming that the guys
>> will be open to that.
> 
> Also see the reply from Ming. It's a balancing act - don't want to add
> extra overhead to the core, but also don't want to carry an extra
> scheduler if the main change is really just variable dispatch batching.
> And since we already have a notion of that, seems worthwhile to explore
> that venue.

I agree,

The main difference is that this balancing is not driven from device
resource pressure, but rather from an assumption of device specific
optimization (and also with a specific optimization target), hence a
scheduler a user would need to opt-in seemed like a good compromise.

But maybe Ming has some good ideas on a different way to add it..