Re: [PATCH] sched_ext: Reject oversized automatic CID shards

[Hui Su]

> However, the only thing reported is "scx_root_enable() failed (-7)",
> which doesn't say much about what went wrong. Can we report the reason
> with scx_error(), similar to what scx_bpf_cid_override() does for
> oversized shards? Something like:
>
> 	if (cids_in_core > SCX_CID_SHARD_MAX_CPUS) {
> 		scx_error(sch, "core with %u cpus exceeds max shard size %d",
> 			  cids_in_core, SCX_CID_SHARD_MAX_CPUS);
> 		return -E2BIG;
> 	}

Thanks for reproducing the issue and testing the fix, Andrea!

I will send v2 with that scx_error() diagnostic.