I have verified and applied the "irq -a" and "irq -s" options on both IA64 and PPC64. Both S390 and S390X do not support the "irq" command, so I'll defer all IRQ-related issues to Michael Holzheu if there's any interest there. I tried it on 32-bit PPC, but I don't have an SMP vmcore, so "irq -a" fails as expected. And the "irq -s" option fails like so: crash> irq -s CPU0 irq: cannot determine size of irq_desc_t crash> And I note that the basic "irq" command does not work on 32-bit PPC: crash> irq irq: invalid structure size: irqdesc FILE: ppc.c LINE: 1292 FUNCTION: ppc_dump_irq() [./crash] error trace: 10066230 => 100cb078 => 100e3a68 => 100fc608 100fc608: SIZE_verify+232 100e3a68: ppc_dump_irq+168 100cb078: cmd_irq+1960 10066230: exec_command+960 irq: invalid structure size: irqdesc FILE: ppc.c LINE: 1292 FUNCTION: ppc_dump_irq() crash> So I'll defer all PPC "irq" command support to Suzuki or Toshi. And lastly, many thanks to Zhang Yanfei for implementing these two options. Dave