Sorry, this problem seems difficult to solve...
[ 0.428620] APIC: NR_CPUS/possible_cpus limit of 256 reached. Processor 378/0x195 ignored.
[ 0.428621] APIC: NR_CPUS/possible_cpus limit of 256 reached. Processor 379/0x197 ignored.
[ 0.428621] APIC: NR_CPUS/possible_cpus limit of 256 reached. Processor 380/0x199 ignored.
[ 0.428622] APIC: NR_CPUS/possible_cpus limit of 256 reached. Processor 381/0x19b ignored.
[ 0.428622] APIC: NR_CPUS/possible_cpus limit of 256 reached. Processor 382/0x19d ignored.
[ 0.428623] APIC: NR_CPUS/possible_cpus limit of 256 reached. Processor 383/0x19f ignored.
[ 0.428706] smpboot: 384 Processors exceeds NR_CPUS limit of 256
[ 0.428707] smpboot: Allowing 256 CPUs, 0 hotplug CPUs
[ 0.432561] setup_percpu: NR_CPUS:256 nr_cpumask_bits:256 nr_cpu_ids:256 nr_node_ids:24
[ 1.015021] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=256, Nodes=24