----- "Daisuke HATAYAMA" <d.hatayama(a)jp.fujitsu.com&gt; wrote: That's correct, there are no per-cpu register values. From the crash utility's perspective, all it gets from the makedumpfile-generated compressed dumpfile is the diskdump_header and kdump_sub_header: struct disk_dump_header { char signature[SIG_LEN]; /* = "DISKDUMP" */ int header_version; /* Dump header version */ struct new_utsname utsname; /* copy of system_utsname */ struct timeval timestamp; /* Time stamp */ unsigned int status; /* Above flags */ int block_size; /* Size of a block in byte */ int sub_hdr_size; /* Size of arch dependent header in blocks */ unsigned int bitmap_blocks; /* Size of Memory bitmap in block */ unsigned int max_mapnr; /* = max_mapnr */ unsigned int total_ram_blocks;/* Number of blocks should be written */ unsigned int device_blocks; /* Number of total blocks in * the dump device */ unsigned int written_blocks; /* Number of written blocks */ unsigned int current_cpu; /* CPU# which handles dump */ int nr_cpus; /* Number of CPUs */ struct task_struct *tasks[0]; }; struct kdump_sub_header { unsigned long phys_base; int dump_level; /* header_version 1 and later */ int split; /* header_version 2 and later */ unsigned long start_pfn; /* header_version 2 and later */ unsigned long end_pfn; /* header_version 2 and later */ }; Dave