action #30649: [tools][openqa] Improve performance by using migrations and external snapshots
action #32968: [kernel][tools] Refactor QEMU backend - Create QEMU process manager and save configuration state
[kernel][tools] QEMU Refactor - Performance settings
Decide on cache mode and 'discard'.
- Status changed from Workable to In Progress
Hardcoded cache.no-flush=on because we do not care about data integrity after a host crash as the tests need to run to completion anyway.
- Status changed from In Progress to Resolved
no-flush saves a significant amount of time. Discard may be useful for reducing VM image sizes, but it is probably better left for another PR.
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