Re: [Fastboot] [PATCH] kexec on ia64

[KAMEZAWA Hiroyuki]

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

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