IntelPython / dpnp / 24714184750

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Build Type

push

github

Committed by web-flow

Commit Message

Release GIL when calling `mkl_lapack::orgqr` (#2850)

This PR fixes a deadlock in QR decomposition tests by adding GIL release
before `mkl_lapack::orgqr` call.

The hang occurred because:
1. dpnp/dpctl submits a `host_task` to manage Python object lifetimes
2. host_task needs to acquire the GIL to decrement reference counts
3. if the main thread holds the GIL during queue submission → deadlock
4. `orgqr` is currently implemented in oneMKL as GPU-to-Host reverse
offload:
```cpp
exec_q.submit([&](sycl::handler& cgh) {
  cgh.depends_on(depends);
   cgh.host_task([=]() { orgqr_host(...); });
}).wait();
```

As a solution PR proposes to release GIL using before calling the OneMKL
operations. The GIL is automatically reacquired when the function
returns (RAII).

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