[Crash-utility] crash-4.0-2.10 ppc64 4-level pagetable fixes

[Dave Anderson]

Badari Pulavarty wrote:

> On Tue, 2005-11-08 at 14:42 -0500, Dave Anderson wrote:
> > Badari Pulavarty wrote:
> >
> > >
> > >
> > > Yep. You are right, those pages are not mapped. Initially
> > > I thought that was the case, but I wasn't really sure if it
> > > can happen with segments from shared libraries. (since
> > > the routine which is telling its not mapped involves
> > > going through my code).
> > >
> > > Anyway, I verified this on x86-64 machine also - I do
> > > get "read" error and those pages are not mapped.
> > >
> > > I guess, my changes are good :)
> > >
> > > Haren, can you review them ?
> > >
> > > Thanks,
> > > Badari
> > >
> >
> > The patch looks just fine to me -- the only minor things to
> > add is a dump of the VM_ORIG/VM_4_LEVEL bits in
> > the ppc64_dump_machdep_table() debug function, and
> > although the "pud_clear_bad" is in all probability quite
> > suitable as a qualifier, it's probably also worth adding
> > an optional "--machdep vm=xxx" command line argument
> > like I put in place for the x86_64 equivalent.  Just to cover
> > our collective arse...
> >
> > Anyway, upon Haren's blessing, it's good to go.
> >
> > Again -- really nice work!
>
> Okay, made recommended changes.
>
> I still need to figure out a decent symbol to identify
> 4-level pagetable layout. I am looking through "nm -Bn".
> I still can't find a decent one. (has to be some symbol
> added for 2.6.14).
>
> Any ideas ?
>

If you can google out the wholesale patch that introduced the
4-level pagetable support, you might find something added
or removed?  That's what I did for the x86_64 qualifier.

Dave


>
> Thanks,
> Badari
>
>   ------------------------------------------------------------------------------------------------------------------------
>                                 Name: crash-ppc64-4level2.patch
>    crash-ppc64-4level2.patch    Type: text/x-patch
>                             Encoding: 7bit
>
>   ------------------------------------------------------------------------------------------------------------------------
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