[SYCL] Prevent deadlock during shutdown by not holding GraphUpdate mutex
#20715
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Pull Request Overview
This PR addresses a deadlock issue that can occur during application shutdown when Level Zero (L0) calls exit() while command enqueue operations are in progress. The fix introduces checks using GlobalHandler::instance().isOkToDefer() to avoid strict lock acquisition during shutdown scenarios.
- Adds shutdown-aware checks before attempting host memory updates
- Modifies
removeMemoryObjectcall to accept a parameter indicating whether strict locking is required - Updates assertion logic to account for potential failures during shutdown
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KseniyaTikhomirova
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Nov 24, 2025
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LGTM
would be nice to fix comments as Copilot's suggested.
Co-authored-by: Copilot <[email protected]>
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Deadlock can happen if L0 calls
exit()while we are in the middle of enqueuing a command.