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A comment on /story/47412569.

Re: by vmg12 on Tuesday March 17, 2026 @09:12PM (#47420508)
Does it only work with that specific version of firecracker and only with vms with 1 vcpu?

More than the sub ms startup time the 258kb of ram per VM is huge.

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Re: by adammiribyan on Wednesday March 18, 2026 @02:56AM (#47422381)
1 vCPU per fork currently. Multi-vCPU is doable (per-vCPU state restore in a loop) but would multiply fork time.

On Firecracker version: tested with v1.12, but the vmstate parser auto-detects offsets rather than hardcoding them, so it should work across versions.

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