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Free disputed cores before processing bitfields (#4008)

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* guide: extract free_cores in scheduler

* scheduler: extract free cores to a separate function

* guide: remove disputed cores from scheduler first

* free disputed cores in scheduler before processing bitfields

* spellcheck is mostly right but sometimes stupid

* add comment and fmt
This commit is contained in:
Robert Habermeier
2021-10-04 17:02:31 +02:00
committed by GitHub
parent 6002865874
commit a1bf894d79
4 changed files with 58 additions and 41 deletions
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polkadot/roadmap/implementers-guide/src/runtime/parainherent.md
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@@ -26,11 +26,11 @@ Included: Option<()>,
1. Hash the parent header and make sure that it corresponds to the block hash of the parent (tracked by the `frame_system` FRAME module),
1. Invoke `Disputes::provide_multi_dispute_data`.
1. If `Disputes::is_frozen`, return and set `Included` to `Some(())`.
1. If there are any concluded disputes from the current session, invoke `Inclusion::collect_disputed` with the disputed candidates. Annotate each returned core with `FreedReason::Concluded`.
1. If there are any concluded disputes from the current session, invoke `Inclusion::collect_disputed` with the disputed candidates. Annotate each returned core with `FreedReason::Concluded`, sort them, and invoke `Scheduler::free_cores` with them.
1. The `Bitfields` are first forwarded to the `Inclusion::process_bitfields` routine, returning a set of freed cores. Provide the number of availability cores (`Scheduler::availability_cores().len()`) as the expected number of bits and a `Scheduler::core_para` as a core-lookup to the `process_bitfields` routine. Annotate each of these freed cores with `FreedReason::Concluded`.
1. For each freed candidate from the `Inclusion::process_bitfields` call, invoke `Disputes::note_included(current_session, candidate)`.
1. If `Scheduler::availability_timeout_predicate` is `Some`, invoke `Inclusion::collect_pending` using it and annotate each of those freed cores with `FreedReason::TimedOut`.
1. Combine and sort the dispute-freed cores, the bitfield-freed cores, and the timed-out cores.
1. Combine and sort the the bitfield-freed cores and the timed-out cores.
1. Invoke `Scheduler::clear`
1. Invoke `Scheduler::schedule(freed_cores, System::current_block())`
1. Extract `parent_storage_root` from the parent header,