Re: deconflicting new syscall numbers for 6.11

Linus Torvalds
2024-07-04T17:34:12Z

On Thu, 4 Jul 2024 at 10:21, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> We don't add stuff "just because we can". We need to have a damn good
> reason for it. And I still don't see the reason, and I haven't seen
> anybody even trying to explain the reason.

IOW, I want to see actual *users* piping up and saying "this is a
problem, here's my real load that spends 10% of time on getrandom(),
and this fixes it".

I'm not AT ALL interested in microbenchmarks or theoretical "if users
need high-performance random numbers".

I need a real actual live user that says "I can't just use rdrand and
my own chacha mixing on top" and explains why having a SSE2 chachacha
in kernel code exposed as a vdso is so critical, and a magical buffer
maintained by the kernel.

Linus