pthread_detach after pthread_setaffinity_np
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This reverts commit de82439.
After a pthread for getaddrinfo is detached, we cannot predict when the thread will exit. It would lead to a segfault by setting pthread_setaffinity to the terminated pthread. I guess this problem would be more likely to occur in high-load environments. This change detaches the pthread after pthread_setaffinity is called. [Feature #19965]
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pointed by @nobu
Do not use `pthread_attr_setaffinity_np` if `sched_getcpu()` exceeds `CPU_SETSIZE`. (Using `CPU_ALLOC()` would be more appropriate.)
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After a pthread for getaddrinfo is detached, we cannot predict when the thread will exit. It would lead to a segfault by setting pthread_setaffinity to the terminated pthread. I guess this problem would be more likely to occur in high-load environments.
https://bugs.ruby-lang.org/issues/19965#note-4
https://bugs.ruby-lang.org/issues/19965#note-7
This change detaches the pthread after pthread_setaffinity is called.