Commits on Aug 12, 2024

1. feat(swingset): allow slow termination/deletion of vats …

   This introduces new `runPolicy()` controls which enable "slow
   termination" of vats. When configured, terminated vats are immediately
   dead (all promises are rejected, all new messages go splat, they never
   run again), however the vat's state is deleted slowly, one piece at a
   time. This makes it safe to terminate large vats, with a long history,
   lots of c-list imports/exports, or large vatstore tables, without fear
   of causing an overload (by e.g. dropping 100k references all in a
   single crank).
   
   See docs/run-policy.md for details and configuration instructions.
   
   The kernelKeeper is upgraded from v1 to v2, to add a new
   'vats.terminated' key, which tracks the vats that have been terminated
   but not yet completely deleted. NOTE: deployed applications must use
   `upgradeSwingset()` when using this kernel version for the first time.
   
   Also refactor vatKeeper.deleteSnapshotsAndTranscripts() into two
   separate methods, to fix a bug that hid in the combination: if the
   snapshot deletion phase exhausted our budget, we'd call
   deleteVatTranscripts() with a budget of 0, which was interpreted as
   "unlimited", and deleted all the transcript spans in a single burst.
   
   refs #8928
   
   Co-authored-by: Richard Gibson <[email protected]>

   

   warner and gibson042 committed Aug 12, 2024
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