Avi Kivity ha scritto:
quoted text
> Jumping in at random, does "process" here mean task or mms_struct?  If 
> the former, doesn't that mean that a 100-thread process can starve out 
> a single-threaded process?
>
> Perhaps we need hierarchical io scheduling, like cfs has for the cpu.
>
Hierarchical would simplify isolating groups of threads or processes.
However, some simple solution is already available with bfq. For 
example, if you have to fairly share the disk bandwidth between the 
above 100 threads and another important thread, you get it by just 
assigning weight 1 to each of these 100 threads, and weight 100 to the 
important one.

Paolo

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