GC high level overview/documentation?

[Chris Williams]

On Thursday, 13 March 2014 at 13:14:03 UTC, Ethan wrote:
> Is there a high level overview of how the runtime expects the
> garbage collector to behave anywhere, or any kind of
> documentation outside of the core.memory and garbage collection
> documentation on dlang.org?

There was a presentation at last year's DConf by Sociomantic on 
their replacement GC. I believe that it included a bit of info on 
the internals of the original collector, though.