Factory Pitfall

Bill Frantz frantz@communities.com
Mon, 28 Dec 1998 11:21:19 -0800

At 08:13 PM 12/25/98 -0500, shapj@us.ibm.com wrote:
>However, we also concluded that a *limited* space bank (i.e. one that
>restricts allocation) should report the delta between current allocation
>and the limit.  This raises a more interesting question: if there is a
>tighter limit imposed from above, which delta should be reported?  My
>feeling is that the limit reported should be the one between your
>allocation limit and the current allocation -- i.e. the answer tells you
>how much space you are authorized to allocate, not how much space you will
>actually be *able* to allocate.  (NB this is not consistent with the
>current EROS space bank implementation).

[-] KeyKOS always reported the real limit.  The logic is that you can
always determine the real limit by trying to allocate the space, so
returning a "virtual" limit doesn't help with covert channels.