Hi, --- background ---------------------------------------------------- * what the makedumpfile is: To shorten the size of the dumpfile and the time of creating the dumpfile, makedumpfile copies only the necessary pages for analysis to the dumpfile from /proc/vmcore. You can specify the kind of unnecessary pages with dump_level. If you want to shorten the size further, enable the compression of the page data. * Xen extraction makedumpfile also has a feature that extracting the part of xen hypervisor and domain-0 from /proc/vmcore taken under xen environment. In most cases under xen environment, it is enough to analyze a cause of system crash. * extract vmcoreinfo from /proc/vmcore makedumpfile 1.2.0 supports to extract the vmcoreinfo data from /proc/vmcore and uses it for dump filtering. (for a vmcore taken under the native environment.) ------------------------------------------------------------------ I'd like to support the "extract vmcoreinfo from /proc/vmcore" function for the Xen extraction too. I think a way of supporting this as follows: * The hypervisor makes its vmcoreinfo at the initialize. * add a new hypervisor call to get the hypervisor's vmcoreinfo. The hypercall would be a subcommand of the kexec hypercall. * dom-0 exposes the hypervisor's vmcoreinfo via /sys/hypervisor/vmcoreinfo * kexec-tool looks /sys/hypervisor/vmcoreinfo and makes an elf-note according it Any comments or suggestions are welcome before I will start to implement it. Thanks. -- Itsuro ODA <oda at valinux.co.jp>
