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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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