On Tue, 04 Apr 2006 20:49:49 -0600 ebiederm@xxxxxxxxxxxx (Eric W. Biederman) wrote: > KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> writes: > > > Hi, I have a question about kexec/kdump. > > > > How does kdump know memory layout (of old kernel) now ? > > > > I'm working for memory hotplug. When memory is hot-added, memory layout changes. > > But I think there is no code to manage memory layout information of added > > memory. > > It is passed from one kernel to another, and it is memorized when you load > the crash dump kernel. If your memory layout changes you need to reload > the crash dump kernel from user space with the appropriate hotplug script. > > Unless this happens often it shouldn't be a problem. > > And yes this does leave a small race during which kexec on panic won't > work. Hmm.. Okay. Before reloading kdump kernel, kdump continues to use old information. (when adding, it's not be big problem.) Thank you. - Kame - : send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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