[PATCH v2 0/8] Initial implementation of kdump for ARM

[Nicolas Pitre]

On Mon, 5 Jul 2010, Per Fransson wrote:

> On 07/05/2010 04:19 PM, Russell King - ARM Linux wrote:
> > On Mon, Jul 05, 2010 at 04:05:56PM +0200, Per Fransson wrote:
> >> Well, I had another suggestion in my last mail.
> > 
> > Which is going to need per-CPU type support in order to achieve.  Do
> > we really want to implement relocate_new_kernel for each of the 24
> > CPU types which we currently support?
> > 
> 
> Perhaps not. Couldn't the variable delay be macrofied then, i.e. a 
> macro like
> 
> MMU_DISABLED_DELAY_AND_EXEC(<asm instr>)
> 
> which would do nothing for an appropriate amount of time and put the 
> instruction in the last MMU mapped slot?

This delay is not the same across various ARM implementations, and I 
don't think it is even reliably predictable and stable on some 
implementations.


Nicolas