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SubjectRe: Slow pthread_create() under high load
Linus Torvalds writes:
> The way these things should work, in my opinion, is that when you
> externally send a signal to the "main thread" (the one whose 'pid'
> the thread collection sees), that signal gets distributed in the
> POSIX signal sense to all the subthreads. But you should still be
> able to send a signal to a specific subthread by using _its_ "native
> pid" aka "thread id".

So, externally, how do you distinguish between sending a signal to
only the "main thread", and sending it to the group?



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