Re: [PATCH v2 0/3] support for broken memory modules (BadRAM)

From: H. Peter Anvin
Date: Wed Jun 22 2011 - 16:26:14 EST

On 06/22/2011 12:15 PM, Andi Kleen wrote:
> On Wed, Jun 22, 2011 at 12:05:07PM -0700, H. Peter Anvin wrote:
>> On 06/22/2011 11:56 AM, Andi Kleen wrote:
>>> You'll always have multiple ways. Whatever magic you come up for
>>> the google BIOS or for EFI won't help the majority of users with
>>> old crufty legacy BIOS.
>> I don't think this has anything to do with this.
> Please elaborate.
> How would you pass the bad page information instead in a fully backwards
> compatible way?

Depends on what you mean with "fully backward compatible". In some ways
this is a nonsense statement since if we create anything new older
kernels will not run.

However, the other discussions in this thread have been about injecting
data in kernel-specific data structures and thus aren't dependent on the
firmware layer used.

The fully backward compatible way is "memmap=<address>$<length>".


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