Design doc: Allocation during deserialization

[Leszek Swirski]

Hi all,

As part of my concurrent allocation work, I'm turning my attention to the deserializer. Currently the deserializer suspends the GC, so in particular code caches will block streaming compilation if the streamer tries to allocate off-thread.

I've collected some thoughts on what it would take to be able to allocate during deserialization. PTAL:

https://docs.google.com/document/d/1KclxQWVQ-zx15aOGkZuhp2LDqt2XTl_YloHcR1ylQ1w/edit?usp=sharing

- Leszek