status of new gabbage collector on mono 2.8 fedora

[Hin-Tak Leung]

Hi - I have been following the progress of integration of mono 2.8 into fedora. e.g.
http://koji.fedoraproject.org/koji/buildinfo?buildID=206128

I am a little disappointed with the sgen being disabled on 64-bit build - I assume that
means the simple generational gabbage collector, rather than 
'sgen - Mono XML Serializer GENerator'. That's the change I have been waiting
for almost two years for some applications I run which does strange things memory-wise and
needs a large heap otherwise(?).

Can somebody post and summarise the problem? I am on f14 and have a mono git (and
regularly cross-compile mono with some local changes) and I'd like to get this fixed,
if something needs fixing.