On Tue Jun 27, 2023 at 21:32, David Rientjes wrote:

On Tue, 27 Jun 2023, Julian Pidancet wrote:

quoted

Make CONFIG_SLAB_MERGE_DEFAULT default to n unless CONFIG_SLUB_TINY is
enabled. Benefits of slab merging is limited on systems that are not
memory constrained: the overhead is negligible and evidence of its
effect on cache hotness is hard to come by.

I don't have an objection to this, I think it makes sense.

When you say overhead here, I assume you're referring to memory footprint?  
Did you happen to have some system-wide numbers for what that looks like 
when running some benchmarks, or even what the slab usage looks like after 
a fresh boot?

Thank you David for the quick review. I'll re-run the benchmark and
measure slab usage when the system is under pressure.

Regards,

-- 
Julian