[PATCH] powerpc: rework 4xx PTE access and TLB miss

[Sean MacLennan]

On Mon, 7 Jul 2008 10:06:27 -0400
"Josh Boyer" <jwboyer at linux.vnet.ibm.com> wrote:

> On Tue, 01 Jul 2008 14:35:42 +1000
> Benjamin Herrenschmidt <benh at kernel.crashing.org> wrote:
> 
> I tried testing this on a Sequoia board this morning.  Kernel boots,
> but then it hangs when starting the init process.  The last message
> seen is:
> 
> INIT: version 2.86
> booting                                                      
> 
> The setup is an tftp'd kernel via U-Boot using cuImage, nfsroot
> filesystem.  Sequoia has an FPU, and CONFIG_PPC_FPU is set.
> 
> I reverted this patch and used the latest powerpc-next branch and it
> boots fine.
> 
> Seems something is wrong here still.  I suspect the DSI handler
> changes, but I have no proof and haven't debugged it yet.  Until we
> get it fixed, I don't feel overly comfortable putting it in the next
> branch.  Which board and setup did you test with?

On a whim, I tired this on the warp platform (440EP) and got the same
result with basically the same setup.

VFS: Mounted root (nfs filesystem).
Freeing unused kernel memory: 156k init
init started: BusyBox v1.9.1 (2008-04-04 14:47:35 EDT)

And then hung. This was against 2.6.26-rc9.

Cheers,
   Sean