RFR (M) 8183923: Get rid of FreeBlockDictionary and dithering
mikael.gerdin at oracle.com
Thu Jul 6 09:20:32 UTC 2017
Please review this cleanup inspired by looking at Roman's CMS cleanup :)
FreeBlockDictionary is an old abstraction for multiple CMS freelist
datastructures which never appear to have been implemented, getting rid
of it also simplifies some code in Metaspace so it's not all CMS stuff.
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