Hi


currently, we use "sysconf(_SC_NPROCESSORS_CONF)" to get the number of the CPU,  and the musl implements this function by SYS_sched_getaffinity system call,  when some of CPUs are isolated, the return value is not correct.


I have searched the history maillist of musl and found the same issue: https://www.openwall.com/lists/musl/2021/05/05/,  but there is no final conclusion. I wonder why musl is doing this?


I'm Looking forward to your reply, Thanks.


Tony Gan