[MLton-devel] max-heap is ignored?

[Stephen Weeks]

> It looks like the max-heap runtime option is being ignored.  Looking in
> mlton/runtime/gc.c I see that the maxHeap member of the GC_state is being
> set but it isn't ever looked at.

Yep.  Looking through the CVS, I see that the bug was introduced in
revision 1.54, over a year ago!

> Either the docs should be fixed or, better I would say, the old behavior
> should be restored.  Was it eliminated by mistake?

It was eliminated by mistake.

I'll add it to my todo list to fix, since the fix is not a one liner.
The difficulty is the interaction with the automatic switching between
Cheney and mark-compact GC.  With Cheney GC, we want the sum of the
two semispace sizes to be <= max-heap.  With mark-compact GC, we want
the (single) heap size to be <= max-heap.



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