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Last update: 1997-05-20
9945-1-90 #47
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Topic: CHILD_MAX system limit
Relevant Sections: 2.8.4
Classification: No change required
Defect Report:
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Can a conforming POSIX.1 implementation have a system-wide limit on the total
number of processes that is equal to {CHILD_MAX}?
Note: If the system-wide limit is the same as {CHILD_MAX}, then when more than
one user is logged-in, or if system processes are counted against the
system-wide limit, no user will be able to obtain {CHILD_MAX} processes.
A closely related question was addressed in an interpretation request submitted
on 18 October 1991 by Chuck Karish. The interpretation in response to that
request, dated June 29, 1992, states:
ISO/IEC. 9945-1:1990 defines {CHILD_MAX} as a limit which shall be
enforced by the implementation. It does not require the implementation
to guarantee the resources needed to reach that limit. Thus a given
system's limit may be less than, equal to, or greater than {CHILD_MAX},
and may vary on processes' consumption of resources.
An issue has arisen concerning the meaning of that interpretation, giving rise
to the current interpretation request.
WG15 response for ISO/IEC 9945-1:1990 (IEEE Std 1003.1-1990)
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See interpretation #65.
Rationale for Interpretation:
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None.
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