Re: [PATCH] net: use sync wakeups for socket error reports

[Breno Leitao]

On Wed, Jul 08, 2026 at 06:38:15AM -0700, Usama Arif wrote:
> Measured on a 176-core EPYC 9D64 host running a Meta production
> workload, bpftrace on tracepoint:ipi:ipi_send_cpu with a kstack filter
> attributed the sock_def_error_report -> ep_poll_callback ->
> try_to_wake_up -> ttwu_queue_wakelist -> __smp_call_single_queue
> chain to 16,326 IPIs/min.

I am interested in why so many sock_def_error_report().

That's seems a lot for genuine socket errors (RST/ICMP) on a healthy
host, so I suspect these aren't errors at all?

Can you share the full stack above sock_def_error_report()?