On Tue, 24 Feb 2015 14:45:16 +0000, Marc Schütz wrote: > It's possible to (ab)use the MMU as a write barrier. Sociomantic's GC > implementation does this by forking and running the scan in the child, > then communicating information back about what can be freed. Video:
sure, it's possible sometimes. i'd like to see forking GC in druntime. but all in all it's just a clever hack. concurrent GC in the same process can't be efficiently done with MMU only: MMU protection has too big granularity and page faults are too slow.
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