Re: [RFD PATCH 01/10] sched: add io latency framework

[Len Brown]

> There is a rb tree per cpu. Each time a task is blocked on an IO, it
> is inserted into the tree. When the IO is complete and the task is
> woken up, its avg latency is updated with the time spent to wait the
> IO and it is removed from the tree. The next time, it will be inserted
> into the tree again in case of io_schedule.

Is there an assumption built-in here that the device interrupt is targeted
at the same CPU as where the task is queued?

thanks,
Len Brown, Intel Open Source Technology Center
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