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proc.5: 'pid_max' is a system-wide limit on number of threads and processes 

Since PIDs > /proc/sys/kernel/pid_max are not allocated, this
file thus also imposes a system-wide limit on the number of
threads and processes.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2014-05-14 06:58:25 +02:00
parent 41dfc98f96
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@ -3219,6 +3219,9 @@ file is also nonzero, then the machine will be rebooted.
.IR /proc/sys/kernel/pid_max " (since Linux 2.5.34)"
This file specifies the value at which PIDs wrap around
(i.e., the value in this file is one greater than the maximum PID).
PIDs greater than this value not allocated;
thus, the value in this file also acts as a system-wide limit
on the total number of processes and threads.
The default value for this file, 32768,
results in the same range of PIDs as on earlier kernels.
On 32-bit platforms, 32768 is the maximum value for