From: Hou Tao <houtao1@xxxxxxxxxx> Hi, This is the formal patchset to remove unnecessary synchronizations in cpu-map after address comments and collect Rvb tags from Toke Høiland-Jørgensen (Big thanks to Toke). Patch #1 removes the unnecessary rcu_barrier() when freeing bpf_cpu_map_entry and replaces it by queue_rcu_work(). Patch #2 removes the unnecessary call_rcu() and queue_work() when destroying cpu-map and does the freeing directly. Test the patchset by using xdp_redirect_cpu and virtio-net. Both xdp-mode and skb-mode have been exercised and no issues were reported. As ususal, comments and suggestions are always welcome. Change Log: v1: * address comments from Toke Høiland-Jørgensen * add Rvb tags from Toke Høiland-Jørgensen * update outdated comment in cpu_map_delete_elem() RFC: https://lore.kernel.org/bpf/20230728023030.1906124-1-houtao@xxxxxxxxxxxxxxx Hou Tao (2): bpf, cpumap: Use queue_rcu_work() to remove unnecessary rcu_barrier() bpf, cpumask: Clean up bpf_cpu_map_entry directly in cpu_map_free kernel/bpf/cpumap.c | 113 ++++++++++++++------------------------------ 1 file changed, 35 insertions(+), 78 deletions(-) -- 2.29.2
