[Bug 227689] getrusage() still stops counting after a while

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227689

            Bug ID: 227689
           Summary: getrusage() still stops counting after a while
           Product: Base System
           Version: 11.1-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: ben at links.org

Created attachment 192723
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=192723&action=edit
Reproducer

This has been reported (and allegedly fixed) before, e.g. #78957, but it is
still true.

After around 100 hours, getrusage() stops counting.

The attached demo stopped with output:

... [381082, 999593]T10.6742 1 [381093, 671972]T10.6724 0 [381104,
363990]T10.692 1 [381104, 363990]T0 0 [381104, 363990]T0 1 [381104, 363990]T0 1
[381104, 363990]T0 1 [381104, 363990]T0

% uname -a
FreeBSD bigcat 11.1-RELEASE-p4 FreeBSD 11.1-RELEASE-p4 #0: Tue Nov 14 06:12:40
UTC 2017     root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC 
amd64

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