disable pinned host memory for pod#318
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Pull request overview
This PR adds upfront validation to reject cross-rank (“pod”) transfers that would require a GPU executor to access remote host (pinned) memory via HIP/CUDA fabric-handle exchange, which is currently unsupported and can lead to crashes.
Changes:
- Add config validation that errors out when a GPU executor is used for a cross-rank transfer involving remote CPU/host memory.
- Remove stale commented-out
GetMemLocationcalls in the pod-communication allocation path.
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gilbertlee-amd
approved these changes
Jun 1, 2026
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Motivation
Disable pinned host memory for cross pod access.
Technical Details
Fabric handle export and exchange is not well supported or thoroughly tested. For current version (1.67), a cross pod transfer involving GPU executor will cleanly error out.
Test Plan
Test Result
Submission Checklist