Re: Which should kcpuset use cpuid or cpu index?

[Matt Thomas <matt%3am-software.com@localhost>]

On Sep 7, 2014, at 7:28 PM, Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost> 
wrote:

> I have a question about kcpuset. Referring "man 9 kcpuset", the APIs
> need cpuid (the type is cpuid_t) to identify CPU. However, the callers
> such as idle_loop() sys/kern/kern_idle.c use cpu index (the type is u_int).
> 
> cpu index means return value of cpu_index(), and cpu index is sequential
> number. On the other hand, cpuid means struct cpu_info.ci_cpuid and cpuid
> is non-sequential number at least x86 and sparc architectures. So, cpu index
> is different from cpuid. Which should kcpuset use cpuid or cpu index?

ci_cpuid is MD and has no standard semantics.

Use cpu_index(ci) (curcpu()->ci_index)