[rucksack-devel] Re: Fwd: State of the nation and heap patch

[Cyrus Harmon]

Great! Does that mean the rucksack-devel team is going to tackle  
performance issues next? :)

Cyrus

On Feb 2, 2008, at 9:12 AM, Arthur Lemmens wrote:

> [Replying to the Rucksack mailing list]
>
> Sean Ross wrote:
>
>> The bad news is that there appears to be an issue with p-btrees and
>> gc. I've attached some code which exercises the bug.
>
> Good catch, thanks a lot for the report.
>
> This turned out to be a subtle bug in the garbage collector: when it
> deletes object ids from the object table (because the objects are
> dead and we may want to reuse their ids later for other objects), it
> should also remove that object from the cache.  If it doesn't, there's
> a possibility that the object id will be reused later for a new object
> and the cache wil still refer to the old in-memory object.  Some kind
> of identity crisis ;-)
>
> I fixed this bug on my machine, but common-lisp.net ssh is  
> inaccessible
> at the moment so I haven't fixed it in CVS yet.
>
> With this bug fix, all data corruption bugs that I'm aware of have
> been fixed now.  But I'm sure there are more problems hidden in some
> dirty corners.  If you find them, please let me know.
>
> Arthur
>
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