const runtime.scavChunkInUseMask
2 uses
runtime (current package)
mgcscavenge.go#L1241: lastInUse: uint16(sc>>16) & scavChunkInUseMask,
mgcscavenge.go#L1272: scavChunkInUseMask = (1 << logScavChunkInUseMax) - 1
The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)