Why does get_lim_data ignore RLIM_INFINITY?

[Ken Brown <kbrown@cornell.edu>]

Paul,

I'm puzzled by one of the changes you made to vm-limit.c:get_lim_data() 
in bzr revision 111152.  Specifically, it doesn't seem right to ignore 
RLIM_INFINITY as in the following comment:

+  /* Set LIM_DATA to the minimum of the maximum object size and the
+     maximum address space.  Don't bother to check for values like
+     RLIM_INFINITY since in practice they are not much less than 
SIZE_MAX.  */

According to POSIX, "If a call to getrlimit() returns RLIM_INFINITY for 
a resource, it means the implementation shall not enforce limits on that 
resource."

So I think this fragment of the original code shouldn't have been removed:

if (rlimit.rlim_cur == RLIM_INFINITY)
  lim_data = -1;

Ken