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Ran 20 May 2026 06:21AM UTC

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Committed 20 May 2026 04:57AM UTC coverage: 80.459%. Remained the same

Job # 26145091551.1

Build Type

push

github

Committed by

web-flow

Commit Message

CA-426408: Consider chunks in task expiry calculation (#7074)

A test of VM with 239 VBDs (1 system disk + 238 iSCSI VBDs) fails
because of `Timed out while waiting on task xxx`. In the fail task:
```
VM.start (task 61)
  → perform_atomics([..., Parallel("Devices.plug"), ...])
    → perform_atomic(Parallel("Devices.plug"))
      ↓
      Parallel:task=61.atoms=2.(Devices.plug (no qemu))
      │
      │ queue_atomics_and_wait(ops=[atom0, atom1])
      │   expiration(atom0) = atomic_expires_after(Nested_parallel(239))
      │                     = Float.max(3600, ...) = 3600s  ← BUG
      │   event_wait(task=79, timeout=3600s)
      │
      ├─ task 79 (worker): Nested_parallel:task=79.atoms=239.(VBDs.activate_epoch_and_plug RW)
      │    │
      │    │ queue_atomics_and_wait(239 ops, chunks of 10)
      │    ├─ chunk 0:  10 × Serial(VBD_set_active, VBD_epoch_begin, VBD_plug)
      │    ├─ chunk 1:  10 × ...
      │    ├─ ...
      │    └─ chunk 23:  9 × ...
      │    └─ total: 82 minutes
      │
      └─ task 80 (worker): Serial(VIF_set_active, VIF_plug)
```
The task expiry calculation for parallel and nested_parallel doesn't
consider the multi chunks. Just get the max expiry in the parallel task
list. In fact the parallel task split to 24 chunks to run.

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