“Mesh: Compacting Memory Management for C/C++ Applications” https://arxiv.org/abs/1902.04738 , #PLDI 2019pic.twitter.com/6qIAzeesdY
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Very nice! There are a few issues I would worry about that you didn't mention in the paper...
VMA fragmentation. As the number of VMAs grows Linux VM operations get slower, and there is a hard limit of 65536 per process. Seems like you have to keep a mapped view of a span around as long as there is at least one object in the span.
TLB misses. You won't be able to use huge page entries for spans less than 2MB that have been meshed.
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