Messages in this thread | | | Date | Wed, 9 Mar 2011 23:46:57 +1100 | From | Anton Blanchard <> | Subject | Re: [PATCH 1/2] kdump: Allow shrinking of kdump region to be overridden |
| |
Hi,
> The crashkernel region is specified via kernel cmdline, so why > not just drop a failure when it overlaps with RMO region? > Am I missing something?
Unfortunately a ppc64 kernel requires a chunk of RMO memory. We would need the ability to specify multiple crashkernel regions - about 32MB in the RMO and the rest can be anywhere. That sounds pretty fragile for a user to configure successfully on the cmdline.
Thats why the ppc64 crashkernel region begins mid way through the RMO region. It means both kernels get a chunk of RMO and we only have to deal with one crashkernel reservation in all the tools and documentation.
Anton
| |