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    SubjectRe: workqueue_set_max_active(wq, 0)?
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    Hi Tejun,

    > > Before I dive in more deeply I figured I'd ask if you think what a good
    > > way of doing this would be (and whether I'm completely insane) :-)
    >
    > Hmmm... yeah, actually, that's what wq uses internally to implement
    > freezable workqueues. It sets max_active to 0 temporarily and waits
    > for all in-flight works to finish. On thaw, the original value is
    > restored.

    Right, it's a little more complicated though because it has to wait etc.

    > Updating workqueue_set_max_active() to return the old value would be a
    > nice API update which goes together, I think.

    Yeah, that would probably be useful, in particular if one tries to
    freeze a paused workqueue...

    johannes



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