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    SubjectRe: voluntary-preempt I0: sluggish feel

    * Ingo Molnar <> wrote:

    > > Oh, sorry for the noise. It was the NVIDIA driver. The open one works
    > > much better with the I0 patch.
    > i can reproduce this and i dont have the NVIDIA driver. When logging
    > in over the network then shell output is chunky with a setting of 2
    > (softirq redirection), shell output is smooth with a value of 1.

    found the reason: ksoftirqd runs at priority 19 by default and this
    causes batching and some softirq starvation. Does the sluggishness go
    away if you do 'renice -10 2' [where '2' is the PID of ksoftirqd]?

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