Benjamin Herrenschmidt wrote:

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commit 64b3d0e8122b422e879b23d42f9e0e8efbbf9744
Author: Benjamin Herrenschmidt [off-list ref]

  powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED

I tried reverting it, but as I had kinda thought, that really didn't 
help.

I'm just recompiling to check that I didn't screw-up during the 
bisection.

Is this a chip that must not have M set ? Or something else ? You guys
have to help if you CC me, I have about 0 idea what a MPC8661d is :-)

Sorry, my fault. It's a Freescale SOC with two e600 cores. Beyond that, I'm afraid I'm a little out of my depth. 

Also, does 4c456a67f501b8b15542c7c21c28812bf88f484b help ?

I believe that to be included in 2.6.29-rc3 if my (rather rudimentary) git skills haven't let me down? The problem persists in 2.6.29-rc3.

Martyn

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