fix: use blocking GLib main context iteration to prevent CPU busy-spin#133
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KKoukiou wants to merge 2 commits into
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fix: use blocking GLib main context iteration to prevent CPU busy-spin#133KKoukiou wants to merge 2 commits into
KKoukiou wants to merge 2 commits into
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GLibEventLoop._iterate_event_loop was calling context.iteration(False), which returns immediately when no events are pending. When process_signals(return_after=...) loops waiting for a signal that takes minutes to arrive (e.g. installation completion in anaconda TUI), this causes a 100% CPU busy-spin. Change the default to blocking iteration (may_block=True) so the GLib context sleeps until a source fires. Add a blocking parameter to the constructor so tests can opt into non-blocking mode. Resolves: rhbz#2344225
KKoukiou
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July 20, 2026 07:11
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GLibEventLoop._iterate_event_loop was calling context.iteration(False), which returns immediately when no events are pending. When process_signals(return_after=...) loops waiting for a signal that takes minutes to arrive (e.g. installation completion in anaconda TUI), this causes a 100% CPU busy-spin.
Change the default to blocking iteration (may_block=True) so the GLib context sleeps until a source fires. Add a blocking parameter to the constructor so tests can opt into non-blocking mode.
Resolves: rhbz#2344225
I was able to reproduce the linked bug:
Before:
With fix:
