Re: [Crash-utility] crash-4.0-2.10 ppc64 4-level pagetable fixes
On Tue, 2005-11-08 at 17:17 -0500, Dave Anderson wrote:
Badari Pulavarty wrote:
> On Tue, 2005-11-08 at 14:52 -0500, Dave Anderson wrote:
> > BTW-- what kernel version introduced this change for ppc64?
>
> 4-level pagetable went into 2.6.14 for ppc64.
> Yuck. That reminds me that "pud_clear_bad()" is not a good
> choice for detecting new layout (its a generic routine - not
> ppc64 specific and is in 2.6.11 onwards).
>
> Funny thing is, I am not sure original crash is working
> on pre-2.6.14 kernel either. I see PTE_SHIFT changed from
> 16 to 17 in 2.6.10. I guess crash is broken from 2.6.10
> onwards for ppc64.
>
> 2.6.10 onwards:
> #define PTE_SHIFT (17)
>
> < 2.6.10: (which crash understands)
> #define PTE_SHIFT (16)
The PTE_SHIFT change was orthogonal to the intro of 4-level page tables?
You would think that they would be tied together, no?
PTE_SHIFT is orthogonal to 4-level changes and it happened in 2.6.10.
My point is, "crash" wouldn't work for kernels between 2.6.10-2.6.14
(even with my changes).
Thanks,
Badari