Dave Lively wrote: > NR_CPUS is certainly a reasonable fallback, but I'd rather > avoid depending on /proc/config.gz for a number of reasons. > But you'd think most CPU hotplug users would mount sysfs, so > that may do the trick. All possible CPUs are nodes under > devices/system/cpu, so the info's already there. Thanks > for the pointing me in the right direction! I'm not opposed to using NR_CPUS. On ppc64 we actually get the possible cpus at boot time, making it possibly much less than NR_CPUS, but we cap it at NR_CPUS on the high end. I don't think the extra allocations are that wasteful or unreasonable. It also follows the KISS philosophy.
