Re: [PATCH v2 0/4] Allow default HARDENED_USERCOPY to be set at compile time

[Kees Cook]

On Wed, Jan 22, 2025 at 05:19:21PM +0000, Mel Gorman wrote:
> on the exact CPU. While the benchmarks are somewhat synthetic, the overhead
> IO-intensive and network-intensive is easily detectable but the root cause
> may not be obvious (e.g. 2-14% overhead for netperf TCP_STREAM running
> over localhost with different ranges depending on the CPU).

I would be curious to see where this overhead is coming from. That seems
extraordinarily high, and makes me think there is something more we
should be fixing. :)

-- 
Kees Cook