> There were only 10K tasks, with likely consecutively-allocated PID's,
> and some minor background fork()/exit() activity, but there are more
> offenders on the read side than get_pid() itself.
>
> There is no question of PID space: the full 2^30 was configured in the
> tests done after the PID space expansion.
oh. Well, there are a whole lot of other places in the unpatched kernel
that iterate over every task. So with the patch applied, all these lockups
go away?
Ingo
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