Fall back to sharing the ingress qdisc slot when it is taken#108
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GitHub-hosted Actions runners now ship an eBPF network-monitoring agent that holds a clsact qdisc on the default interface, and the kernel allows only one ingress/clsact qdisc per device, so throttle's "tc qdisc add ... ingress" fails with "Exclusivity flag on, cannot modify" and takes the whole run down. The original setup and stop paths are unchanged and always run first; only when the qdisc add fails does throttle attach its redirect filters to the existing qdisc instead, with explicit filter priorities so stop can remove exactly its own filters and leave the other tool's qdisc and filters alone. Co-authored-by: Claude Fable 5 noreply@anthropic.com
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GitHub-hosted Actions runners now ship an eBPF network-monitoring agent that holds a clsact qdisc on the default interface, and the kernel allows only one ingress/clsact qdisc per device, so throttle's "tc qdisc add ... ingress" fails with "Exclusivity flag on, cannot modify" and takes the whole run down. The original setup and stop paths are unchanged and always run first; only when the qdisc add fails does throttle attach its redirect filters to the existing qdisc instead, with explicit filter priorities so stop can remove exactly its own filters and leave the other tool's qdisc and filters alone.
Co-authored-by: Claude Fable 5 noreply@anthropic.com