Xin Liu wrote: > When huang uses sched_switch tracepoint, the tracepoint > does only one thing in the mounted ebpf program, which > deletes the fixed elements in sockhash ([0]) > > It seems that elements in sockhash are rarely actively > deleted by users or ebpf program. Therefore, we do not > pay much attention to their deletion. Compared with hash > maps, sockhash only provides spin_lock_bh protection. > This causes it to appear to have self-locking behavior > in the interrupt context. > > [0]:https://lore.kernel.org/all/CABcoxUayum5oOqFMMqAeWuS8+EzojquSOSyDA3J_2omY=2EeAg@xxxxxxxxxxxxxx/ > > Reported-by: Hsin-Wei Hung <hsinweih@xxxxxxx> > Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface") > Signed-off-by: Xin Liu <liuxin350@xxxxxxxxxx> Yeah even if we delete entries we do it from a sockops. Thanks for the fix. Acked-by: John Fastabend <john.fastabend@xxxxxxxxx>
