Re: [Crash-utility] crash vs irqs

D. Hugh Redelmeier wrote: Could be shifting sands syndrome, which happens all the time. Perhaps "irq_desc_t" has been removed from that kernel? I've got a slightly older 2.6.21-1.3125.fc7 source tree hanging around that shows this: /* * Migration helpers for obsolete names, they will go away: */ #define hw_interrupt_type irq_chip typedef struct irq_chip hw_irq_controller; #define no_irq_type no_irq_chip typedef struct irq_desc irq_desc_t; Interesting, the "go away" comment -- perhaps it's no longer there in -1.3228? Anyway presuming that the irq_desc structure is still in place, you could try rebuilding crash by changing all instances of the string arguments below that use "irq_desc_t" to "irq_desc": Text string: "irq_desc_t" File Line 0 kernel.c 281 MEMBER_OFFSET_INIT(irq_desc_t_status, "irq_desc_t", "status"); 1 kernel.c 282 if (MEMBER_EXISTS("irq_desc_t", "handler")) 2 kernel.c 283 MEMBER_OFFSET_INIT(irq_desc_t_handler, "irq_desc_t", "handler"); 3 kernel.c 285 MEMBER_OFFSET_INIT(irq_desc_t_chip, "irq_desc_t", "chip"); 4 kernel.c 286 MEMBER_OFFSET_INIT(irq_desc_t_action, "irq_desc_t", "action"); 5 kernel.c 287 MEMBER_OFFSET_INIT(irq_desc_t_depth, "irq_desc_t", "depth"); 6 kernel.c 349 STRUCT_SIZE_INIT(irq_desc_t, "irq_desc_t"); 7 ppc.c 111 STRUCT_SIZE_INIT(irq_desc_t, "irq_desc_t"); 8 ppc64.c 197 STRUCT_SIZE_INIT(irq_desc_t, "irq_desc_t"); For example, the 0'th line above would be: MEMBER_OFFSET_INIT(irq_desc_t_status, "irq_desc", "status"); You can test whether the structure sizes and structure member offsets have been successfully determined by entering "help -o", which gives the full dump of all member offsets, structure sizes and array sizes, or in this case, add a string qualifier argument to pare it down: crash> help -o irq_desc offset_table: irq_desc_t_status: 40 irq_desc_t_handler: -1 irq_desc_t_chip: 8 irq_desc_t_action: 32 irq_desc_t_depth: 44 size_table: irq_desc_t: 256 array_table: irq_desc: 239 crash> In the kernel above, the old "handler" member has been renamed to "chip" in later kernels. In your kernel, I would presume that you've got -1's in all but the irq_desc array_table entry. Dave