Re: [linus:master] [x86/bugs] a3af84b0fa: stress-ng.seccomp.ops_per_sec 95.7% regression

[Dave Hansen]

On 11/2/26 02:43, Chengfeng Lin wrote:
> I found another workload affected by a3af84b0fa00 while running MMTests:
> Redis ZPOPMIN throughput on v7.3 is about 13% lower than on v7.1.3.
> Unlike the repeated filter loading discussed here, the slowdown remains
> after the tasks that triggered the predictor flush (IBPB) have exited.
> Can this cost be reduced while preserving the security protection?

To answer the question: I don't see anything obvious. These performance
issues where the overhead is smeared across a bunch of places are among
the most difficult to figure out.

All I can suggest is to have the LLM that you've been using so far do
some more digging and see if it can come up with anything else.