Messages in this thread | | | Date | Thu, 12 Mar 2020 20:09:42 +0300 | From | Alexey Dobriyan <> | Subject | Re: [PATCH 1/2] sched: make nr_running() return "unsigned int" |
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On Thu, Mar 12, 2020 at 11:44:27AM +0100, Peter Zijlstra wrote: > On Thu, Mar 12, 2020 at 12:06:08AM +0300, Alexey Dobriyan wrote: > > I don't anyone have been crazy enough to spawn 2^32 threads. > > It'd require absurd amounts of physical memory. > > And we're going to 5 level page-tables because 48 bits physical isn't > enough. 57 bits of physical is plenty space to spawn that many tasks and > still have some left over. > > Now 32 bit tasks is indeed insane, but memory isn't the problem. The > actual limit is the pid-space, which is 30 bits.
Indeed, pid space limit is even better!
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