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SubjectRe: init's children list is long and slows reaping children.
Robin Holt wrote:
> wait_task_zombie() is taking many seconds to get through the list.
> For the case of a modprobe, stop_machine creates one thread per cpu
> (remember big number). All are parented to init and their exit will
> cause wait_task_zombie to scan multiple times most of the way through
> this very long list looking for threads which need to be reaped.

Could you try this patch


It can't solve the whole problem, but at least an exiting kernel thread
won't kick init.


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