[CC linux-api] On Wed 07-06-17 17:23:20, Leizhen (ThunderTown) wrote: > When I executed numactl -H(print cpumask_of_node for each node), I got > different result on X86 and ARM64. For each numa node, the former > only displayed online CPUs, and the latter displayed all possible > CPUs. Actually, all other ARCHs is the same to ARM64. > > So, my question is: Which case(online or possible) should function > cpumask_of_node be? Or there is no matter about it? Unfortunatelly the documentation is quite unclear What: /sys/devices/system/node/nodeX/cpumap Date: October 2002 Contact: Linux Memory Management list <linux-mm@xxxxxxxxx> Description: The node's cpumap. not really helpeful, is it? Semantically I _think_ printing online cpus makes more sense because it doesn't really make much sense to bind anything on offline nodes. Generic implementtion of cpumask_of_node indeed provides only online cpus. I haven't checked specific implementations of arch specific code but listing offline cpus sounds confusing to me. -- Michal Hocko SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
