net/udp: resolve UDP exit delay due to high CPU usage #17593
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wangchen61698
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acassis
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Dec 22, 2025
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@wangchen61698 please provide a valid test in the mainline, it is good to know it is used in some device in the field, but that device is not using the HEAD of our current mainline, so please test it with mainline (ideally provide some valid test that other people can reproduce)
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please update the commit title to:
net/udp: resolve UDP exit delay due to high CPU usage
xiaoxiang781216
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Dec 23, 2025
In scenarios where CPU utilization is high, txdrain_worker is not being executed in the LPWORK queue. Therefore, the implementation method of udp_writebuffer_signal is removed, and txdrain_sem is directly set Signed-off-by: wangchen <wangchen41@xiaomi.com>
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Summary
In scenarios where CPU utilization is high, txdrain_worker is not being executed in the LPWORK queue. Therefore, the implementation method of udp_writebuffer_signal is removed, and txdrain_sem is directly set
Impact
udp
Testing
It has passed self-testing in true machine(speaker equipment)