#11521: Use weak references to cache homsets
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Reporter: jpflori | Owner: robertwb
Type: defect | Status:
positive_review
Priority: major | Milestone: sage-5.5
Component: coercion | Resolution:
Keywords: sd35 | Work issues:
Report Upstream: N/A | Reviewers: Jean-Pierre
Flori, Nils Bruin
Authors: Simon King | Merged in:
Dependencies: #12969; to be merged with #715 | Stopgaps:
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Comment (by SimonKing):
Replying to [comment:174 jpflori]:
> > I have always tested these tickets together.
> This is not completely clear, do you mean:
> * #715 without the strong cache + #11521 (which is highly unprobable
because of the bsd segfault, but let's mention this solution)?
This isn't a solution, because of the segfault.
> * #715 with strong cache + #11521?
Yes. Do the tests pass in that setting?
> * #715 + #11521 + #13447 (assuming the strong cache is removed either
from #715 directly or by means of a second reverse patch in #13447)?
That would be the long term aim, from my perspective. But getting the
refcount right turned out to be trickier than I originally thought. Hence,
for now (again: ''IF'' the tests pass) I'd prefer #715+#11521 with the
ugly strong cache for polynomial rings.
> > Plus, we ''know'' why a strong cache prevents the problems observed.
> I guess you mean the bsd bug.
> Not the memory leaks problems these tickets try to tackle, is that
right?
Yes and no. A strong cache for polynomial rings would mean that my current
Sage applications would eat too much memory - hence, yes, a strong cache
is opposite to the spirit of these tickets. However, for all other
parents, these the tickets would still fix some memory leaks.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11521#comment:175>
Sage <http://www.sagemath.org>
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