Messages in this thread | | | From | "Stephen C. Tweedie" <> | Date | Thu, 22 Apr 1999 22:41:41 +0100 (BST) | Subject | Re: forking |
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Hi,
On Wed, 21 Apr 1999 08:47:12 -0400 (EDT), System Administrator <admin@intergrafix.net> said:
> [admin@cygnus admin]$ ./fork > ... > Forks = 37
> [admin@cygnus admin]$ ps aux | wc -l > 472
472 + 37 == 509. Except the "ps aux | wc" counts as two processes, the ./fork is only one, so you only had 508 during the first test. MIN_TASKS_LEFT_FOR_ROOT defaults to 4, and the NR_TASKS upper limit defaults to 512.
508 + 4 = 512. tasks_I_had_running + tasks_left_for_root = max_nr_tasks.
Everything adds up: this is expected behaviour if you don't increase NR_TASKS. You can increase NR_TASKS in include/linux/tasks.h (but not too much: I think you hit LDT limits above about 4090, though Ingo has a patch to remove that limit).
--Stephen
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