cq wait using fd

[xmakro]

Waits for one or more work completions in a Completion Queue (CQ). This is useful to avoid spin-looping in low-traffic scenarios

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 89 lines in your changes missing coverage. Please review.

Project coverage is 6.2%. Comparing base (5e66bf7) to head (1d49400).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
ibverbs/src/lib.rs	0.0%	89 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
ibverbs/src/lib.rs	5.5% <0.0%> (-0.8%)	⬇️

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[jonhoo]

Excellent, thank you!