Re: dynamic oldmem in kdump kernel

Olaf Hering
2011-04-07T13:13:02Z

On Thu, Apr 07, Américo Wang wrote:

> On Thu, Apr 7, 2011 at 5:56 PM, Olaf Hering <olaf@aepfle.de> wrote:
> > Another issue, slightly related, is memory hotplug.
> > How is this currently handled for kdump?  Is there code which
> > automatically reconfigures the kdump kernel with the new memory ranges?
> >
>
> No, the crashkernel memory is reserved during boot, and it is static after
> that (except you can shrink this memory via /sys).

I meant the overall amount of memory changed by memory hotplug events,
not the small memory range for the crash kernel itself.

> Kdump isn't aware of memory hotplug.

Ok. Perhaps there are hotplug events where a helper script could run
something like 'rckdump restart'.

Olaf