On 2011-06-20 18:34, Avi Kivity wrote: >> > >> > Do ILO cards / IPMI support something like this? We could follow >> their >> > lead in that case. >> >> The only two things which came to my mind are: >> >> * NMI (aka. ipmitool diag) - already available in qemu/kvm - but >> requires >> in-guest kexec/kdump >> * Hardware-Watchdog (also available in qemu/libvirt) > > A watchdog has the advantage that is also detects lockups. > > In fact you could implement the panic device via the existing > watchdogs. Simply program the timer for the minimum interval and > *don't* service the interrupt. This would work for non-virt setups as > well as another way to issue a reset. If you manage to bring down the other guest CPUs fast enough. Otherwise, they may corrupt your crashdump before the host had a chance to collect all pieces. Synchronous signaling to the hypervisor is a bit safer. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
