Spare pages are returned to the OS using the ring in roughly LRU order.
Only enough spare pages are returned to maintain hysteresis, rather than all of them.
Nearly ready to strip out the noSparePages bit table.
Copied from Perforce
Change: 184245
ServerID: perforce.ravenbrook.com
Avoid if with empty body by adding NOOP.
Avoid extended offsetof in expansion of PageOfTract, linkOfMessage, linkOfRing, and Pool2AMST macros.
Copied from Perforce
Change: 183413
ServerID: perforce.ravenbrook.com
tract.c -- fix more ChunkCache defects:
- drop never-read chunkCache->pageTableBase and pageTableLimit fields: they were used for ChunkOfSeg(), back when each SegStruct was actually a PageStruct is some chunk's PageStructTable; see VMArenaChunkOfSeg() in //info.ravenbrook.com/project/mps/branch/2001-08-13/trunk/src/arenavm.chttps://github.com/Ravenbrook/mps/issues/46
- there's no need for arena to initialise the chunk cache; this allows en/decache functions to be local to tract.c (ie. declared static)
Copied from Perforce
Change: 170083
ServerID: perforce.ravenbrook.com
Making some new files consistent with changes from that branch.
Deleting some new Global Graphics confidential files.
Copied from Perforce
Change: 30256
ServerID: perforce.ravenbrook.com
This change will be integrated but ignored (-ay) to the gg-epcore/union sources, so that they retain HopeNames.
Copied from Perforce
Change: 24911
ServerID: perforce.ravenbrook.com
This was achieved by partially undoing changelist 24817, including an accidental corruption of eventgen.pl.
Copied from Perforce
Change: 24877
ServerID: perforce.ravenbrook.com
