Re: kcmp(2)

[Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost>]

> Date: Tue, 11 Jul 2023 22:00:25 +0100
> From: Robert Swindells <rjs%fdy2.co.uk@localhost>
> 
> Linux has the kcmp(2) syscall, Mesa makes use of it.
> 
> Do we want a version of the syscall?

Can you give any more details?

What is kcmp(2) useful for?

Is kcmp(2) a good design for that goal?

What does Mesa use kcmp(2) for?

Is there another way to accomplish what Mesa is trying to use it for?

Is the functionality in Mesa optional or mandatory?

If optional, what are the consequences of disabling it?

What do operating systems other than Linux do?