[Crash-utility] x86_64 limit of 454 cpu's?

Hi Dave, and company, I get this error trying to open a dump of a large system: crash: compressed kdump: invalid nr_cpus value: 640 crash: vmcore: not a supported file format The message is from diskdump.c: if (sizeof(*header) + sizeof(void *) * header->nr_cpus > block_size || header->nr_cpus <= 0) { error(INFO, "%s: invalid nr_cpus value: %d\n", block_size is the page size of 4096 struct disk_dump_header looks like 464 bytes void * is 8 So it looks like 454 is the maximum number of cpus. 464 + 454*8 -> 4096 Is this intentional? It looks like a restriction that no one ever complained about. But there are systems (Altix UV) with 2048 cpu's. Is there an easy fix? -Cliff