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| author | Yan Zhai <[email protected]> | 2024-03-19 20:44:40 +0000 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2024-03-21 04:05:43 +0000 |
| commit | 00bf63122459e87193ee7f1bc6161c83a525569f (patch) | |
| tree | bb54c5de6214b985d103ec0d400e6b8d9527e10f /scripts/bpf_doc.py | |
| parent | net: report RCU QS on threaded NAPI repolling (diff) | |
| download | kernel-00bf63122459e87193ee7f1bc6161c83a525569f.tar.gz kernel-00bf63122459e87193ee7f1bc6161c83a525569f.zip | |
bpf: report RCU QS in cpumap kthread
When there are heavy load, cpumap kernel threads can be busy polling
packets from redirect queues and block out RCU tasks from reaching
quiescent states. It is insufficient to just call cond_resched() in such
context. Periodically raise a consolidated RCU QS before cond_resched
fixes the problem.
Fixes: 6710e1126934 ("bpf: introduce new bpf cpu map type BPF_MAP_TYPE_CPUMAP")
Reviewed-by: Jesper Dangaard Brouer <[email protected]>
Signed-off-by: Yan Zhai <[email protected]>
Acked-by: Paul E. McKenney <[email protected]>
Acked-by: Jesper Dangaard Brouer <[email protected]>
Link: https://lore.kernel.org/r/c17b9f1517e19d813da3ede5ed33ee18496bb5d8.1710877680.git.yan@cloudflare.com
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'scripts/bpf_doc.py')
0 files changed, 0 insertions, 0 deletions