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By Zayden R., August 25, 2026
A patch series for the Linux ath11k driver drastically lowers latency for Qualcomm WiFi 6 hardware. Engineers should note the potential for up to 2.2x throughput improvement at identical latency.
In a significant update for those utilizing Qualcomm WiFi 6 hardware, the Linux ath11k driver has received a patch series that reduces latency by a factor of seven. Open-source developer Julius Bairaktaris spearheaded this effort to address inefficiencies in the driver's handling of network queues.
The core issue lay in the ath11k driver's lack of support for NL80211_EXT_FEATURE_AQL and NL80211_EXT_FEATURE_AIRTIME_FAIRNESS. Without these features, the driver was unable to maintain its own queue, leading to increased latency as all queued data was forced into hardware TX rings without AQM or flow separation.
Bairaktaris' patches, which add just over 150 lines of code, bring the queue back under mac80211's control. This change results in roughly seven times lower latency in scenarios where the queue limit is reached. Additionally, one particular patch in the series, known as patch 6, offers a throughput improvement of 2.2 times at identical latency levels.
The practical impact of these enhancements is significant, especially for network administrators and engineers working with IPQ8074 access points and similar configurations. By optimizing how data packets are queued and processed, the updated driver can handle saturated TCP downstreams more efficiently.
The patch series is currently under review on the Linux kernel mailing list, with contributions from Claude Opus 5. Engineers interested in these improvements should keep an eye on the mainline integration process and consider testing the patches in applicable environments.
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