How does kdump deal with trampoline allocation?

Eric W. Biederman ebiederm at
Wed Dec 29 03:37:04 EST 2010

"H. Peter Anvin" <hpa at> writes:

> On 12/28/2010 08:13 PM, Eric W. Biederman wrote:
>> "H. Peter Anvin" <hpa at> writes:
>>> Well, the trampoline is optional only on 32 bits, and with my changes,
>>> it would be unconditional.
>> What motivates your trampoline rewrite?
> The fact that so far four different pieces of code have low memory
> trampolines, and each is implemented differently.  Furthermore, I'm
> currently being forced to work on a fifth.  This unifies all that code,
> but it also makes it unconditional since at least reboot=bios is always
> going to need to be there.

That makes some sense.  I remember seeing your complaining about how
many different flavors of physical page tables we have.

When your patches are ready cc me and I will be happy to look them
over and see if I can spot anything you might have missed.


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