[Fwd: [Linuxppc-dev] Re: [Linuxppc-cvs64] CVS: linuxppc64_2_4/arch/ppc64/kernel head.S,1.32.6.1,1.32.6.2]

[Anton Blanchard]

> I'm not sure that we have other exposures like this one.  Certainly in
> the case we have identified, we should be ok.  The text is bolted in
> the SLB so the only exception should be on the stack address segment.
> As long as the kernel stack is aligned to its size, we will only take
> the one exception & then the stack should be ok.  At this point, we
> are hard disabled and all addresses are bolted in the HPT.

I agree the current fix is the way to go for 2.4. In 2.5 Im going to
experiment with replaying exception exit since the SLB cast out
path will be heavily hit on workloads with very large memory footprints.

Anton

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