Small parallel GC improvement
Small parallel GC improvement

Overlap the main thread's clearNursery() with the other threads.

snoyberg/ghc,gridaphobe/ghc,sdiehl/ghc,bitemyapp/ghc,da-x/ghc,vTurbine/ghc,spacekitteh/smcghc,mfine/ghc,snoyberg/ghc,wxwxwwxxx/ghc,elieux/ghc,da-x/ghc,ghc-android/ghc,siddhanathan/ghc,tjakway/ghcjvm,ghc-android/ghc,sgillespie/ghc,snoyberg/ghc,lukexi/ghc-7.8-arm64,fmthoma/ghc,oldmanmike/ghc,green-haskell/ghc,wxwxwwxxx/ghc,gcampax/ghc,mfine/ghc,anton-dessiatov/ghc,da-x/ghc,mcschroeder/ghc,AlexanderPankiv/ghc,siddhanathan/ghc,sdiehl/ghc,ghc-android/ghc,christiaanb/ghc,nkaretnikov/ghc,GaloisInc/halvm-ghc,acowley/ghc,acowley/ghc,frantisekfarka/ghc-dsi,ekmett/ghc,mettekou/ghc,sdiehl/ghc,acowley/ghc,fmthoma/ghc,vTurbine/ghc,vTurbine/ghc,lukexi/ghc-7.8-arm64,acowley/ghc,nkaretnikov/ghc,nushio3/ghc,AlexanderPankiv/ghc,anton-dessiatov/ghc,elieux/ghc,ekmett/ghc,hferreiro/replay,sdiehl/ghc,ezyang/ghc,GaloisInc/halvm-ghc,acowley/ghc,lukexi/ghc-7.8-arm64,ekmett/ghc,spacekitteh/smcghc,lukexi/ghc,urbanslug/ghc,vTurbine/ghc,olsner/ghc,mcschroeder/ghc,gridaphobe/ghc,nathyong/microghc-ghc,green-haskell/ghc,elieux/ghc,sgillespie/ghc,nushio3/ghc,acowley/ghc,nathyong/microghc-ghc,nushio3/ghc,ezyang/ghc,mettekou/ghc,mcschroeder/ghc,oldmanmike/ghc,lukexi/ghc-7.8-arm64,mfine/ghc,tjakway/ghcjvm,oldmanmike/ghc,anton-dessiatov/ghc,hferreiro/replay,sdiehl/ghc,sgillespie/ghc,ml9951/ghc,ryantm/ghc,urbanslug/ghc,ryantm/ghc,ml9951/ghc,anton-dessiatov/ghc,gridaphobe/ghc,AlexanderPankiv/ghc,bitemyapp/ghc,sgillespie/ghc,nushio3/ghc,shlevy/ghc,jstolarek/ghc,vikraman/ghc,sgillespie/ghc,bitemyapp/ghc,ezyang/ghc,shlevy/ghc,christiaanb/ghc,nathyong/microghc-ghc,da-x/ghc,ezyang/ghc,olsner/ghc,ghc-android/ghc,oldmanmike/ghc,mettekou/ghc,snoyberg/ghc,oldmanmike/ghc,tjakway/ghcjvm,shlevy/ghc,tibbe/ghc,shlevy/ghc,ryantm/ghc,mcschroeder/ghc,elieux/ghc,forked-upstream-packages-for-ghcjs/ghc,urbanslug/ghc,mcschroeder/ghc,forked-upstream-packages-for-ghcjs/ghc,forked-upstream-packages-for-ghcjs/ghc,gcampax/ghc,gridaphobe/ghc,ghc-android/ghc,da-x/ghc,frantisekfarka/ghc-dsi,lukexi/ghc,christiaanb/ghc,ezyang/ghc,ryantm/ghc,ezyang/ghc,AlexanderPankiv/ghc,nkaretnikov/ghc,spacekitteh/smcghc,nushio3/ghc,anton-dessiatov/ghc,elieux/ghc,mfine/ghc,mfine/ghc,lukexi/ghc,spacekitteh/smcghc,ml9951/ghc,oldmanmike/ghc,lukexi/ghc,tjakway/ghcjvm,ml9951/ghc,frantisekfarka/ghc-dsi,gcampax/ghc,GaloisInc/halvm-ghc,jstolarek/ghc,anton-dessiatov/ghc,green-haskell/ghc,AlexanderPankiv/ghc,snoyberg/ghc,christiaanb/ghc,green-haskell/ghc,da-x/ghc,sdiehl/ghc,christiaanb/ghc,holzensp/ghc,TomMD/ghc,green-haskell/ghc,GaloisInc/halvm-ghc,forked-upstream-packages-for-ghcjs/ghc,wxwxwwxxx/ghc,mcschroeder/ghc,olsner/ghc,hferreiro/replay,holzensp/ghc,holzensp/ghc,tibbe/ghc,vTurbine/ghc,GaloisInc/halvm-ghc,ryantm/ghc,gridaphobe/ghc,shlevy/ghc,vTurbine/ghc,tibbe/ghc,nkaretnikov/ghc,snoyberg/ghc,ml9951/ghc,forked-upstream-packages-for-ghcjs/ghc,elieux/ghc,TomMD/ghc,AlexanderPankiv/ghc,ezyang/ghc,tibbe/ghc,nathyong/microghc-ghc,gcampax/ghc,urbanslug/ghc,mettekou/ghc,mettekou/ghc,vikraman/ghc,wxwxwwxxx/ghc,TomMD/ghc,mcschroeder/ghc,nushio3/ghc,hferreiro/replay,ml9951/ghc,GaloisInc/halvm-ghc,shlevy/ghc,gridaphobe/ghc,lukexi/ghc-7.8-arm64,bitemyapp/ghc,christiaanb/ghc,holzensp/ghc,fmthoma/ghc,olsner/ghc,frantisekfarka/ghc-dsi,vikraman/ghc,TomMD/ghc,gcampax/ghc,hferreiro/replay,vikraman/ghc,oldmanmike/ghc,nkaretnikov/ghc,gridaphobe/ghc,acowley/ghc,snoyberg/ghc,elieux/ghc,jstolarek/ghc,sgillespie/ghc,da-x/ghc,siddhanathan/ghc,urbanslug/ghc,lukexi/ghc,ml9951/ghc,nkaretnikov/ghc,christiaanb/ghc,shlevy/ghc,siddhanathan/ghc,mettekou/ghc,vikraman/ghc,mfine/ghc,mettekou/ghc,nushio3/ghc,TomMD/ghc,forked-upstream-packages-for-ghcjs/ghc,hferreiro/replay,vTurbine/ghc,nathyong/microghc-ghc,olsner/ghc,gcampax/ghc,olsner/ghc,tjakway/ghcjvm,jstolarek/ghc,AlexanderPankiv/ghc,fmthoma/ghc,ekmett/ghc,siddhanathan/ghc,vikraman/ghc,nkaretnikov/ghc,ghc-android/ghc,fmthoma/ghc,TomMD/ghc,nathyong/microghc-ghc,gcampax/ghc,ml9951/ghc,siddhanathan/ghc,bitemyapp/ghc,ghc-android/ghc,wxwxwwxxx/ghc,ekmett/ghc,hferreiro/replay,wxwxwwxxx/ghc,tibbe/ghc,jstolarek/ghc,mfine/ghc,wxwxwwxxx/ghc,urbanslug/ghc,tjakway/ghcjvm,frantisekfarka/ghc-dsi,sdiehl/ghc,sgillespie/ghc,spacekitteh/smcghc,fmthoma/ghc,fmthoma/ghc,nathyong/microghc-ghc,urbanslug/ghc,anton-dessiatov/ghc,forked-upstream-packages-for-ghcjs/ghc,TomMD/ghc,holzensp/ghc,siddhanathan/ghc,tjakway/ghcjvm,vikraman/ghc,GaloisInc/halvm-ghc,olsner/ghc