otp.git/lib, branch OTP-20.2.3

Update release notes

2018-02-12T12:38:43+00:00

Update version numbers

2018-02-12T12:38:24+00:00

Merge branch 'sverker/maint-20/alloc-n-migration/ERIERL-88' into maint-20

2018-02-12T12:38:23+00:00

* sverker/maint-20/alloc-n-migration/ERIERL-88:
  erts: Add system_flags(erts_alloc,"+M?sbct *")
  erts: Add age order first fit allocator strategies
  erts: Refactor erl_ao_firstfit_alloc
  erts: Add migration options "acnl" and "acfml"
  erts: Add more stats for mbcs_pool
  erts: Fix alloc_SUITE:migration
  stdlib: Make ets_SUITE memory check try again
  erts: Improve carrier pool search
  erts: Improve alloc_SUITE:migration
  erts: Refactor carrier dealloc migration

Merge 'sverker/maint-19/alloc-n-migration/ERIERL-88'

2018-02-12T12:32:51+00:00

into 'sverker/maint-20/alloc-n-migration/ERIERL-88'

OTP-14915
OTP-14916
OTP-14917
OTP-14918

Merge 'sverker/carrier-migration-improvements'

2018-02-12T12:25:02+00:00

into 'sverker/maint-19/alloc-n-migration/ERIERL-88'

erts: Add age order first fit allocator strategies

2018-02-12T12:23:15+00:00

ageffcaoff: Age First Fit Carrier, Address Order First Fit (within carrier)
ageffcbf  : Age First Fit Carrier, Best Fit (within carrier)
ageffcaobf: Age First Fit Carrier, Address Order Best Fit (within carrier)

Prefer old carriers, the older the better.

kernel: Add os:cmd/2 with max_size option

2018-01-17T15:36:22+00:00

stdlib: Make ets_SUITE memory check try again

2017-12-20T14:19:32+00:00

as memory stats do not guarantee consistency.

A typical ETS test case ends by a lot of deallocating
that may now trigger homecoming carrier migration,
that in turn can cause quite large inconsistencies
in memory stats when same carrier is accounted for twice
or not at all.

And that's my theory why I now sometimes see transient discrepancies
between before and after memory stats.

Prepare release

2017-12-18T14:36:39+00:00

Merge branch 'dgud/mnesia/checkpoint-crash/OTP-14841' into maint-20

2017-12-18T14:36:32+00:00

* dgud/mnesia/checkpoint-crash/OTP-14841:
  mnesia: Fix checkpoint crash