GC leaks debugging
Erik J Groeneveld
Fri Apr 15 07:32:00 GMT 2011
Op 14 apr. 2011 om 12:49 heeft Andrew Haley <email@example.com> het volgende geschreven:
>>> Why do you want to munmap, anyway? Are you running out of swap space?
>> Well, I assume that if the GC unmaps a page (hblk), it can always be
>> mapped at any other location when a new block is needed, effectively
>> circumventing fragmentation completely.
> AFAIK it just returns the memory to the OS;
It turns out it doesn't. It remaps it as not accessible. And it is only doing so after the block hasn't been used for a while.
And there is some complicated code that seems to remap all such blocks into a larger block.
> I don't think it affects
> anything else.
I am still hoping it does. ;-)
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