Re: [PATCH] sparc64: swapper_tsb and swapper_4m_tsb phys correction

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From: David Miller <davem@xxxxxxxxxxxxx>
Date: Thu, 18 Sep 2014 19:16:37 -0400 (EDT)

> I'm half-way done with the "use kernel page tables for everything"
> patch, and will post once I have something that at least work for
> me.

Bob, I ran into a major roadblock which is going to delay this work
a little bit.

In fact it pointed out a bug we introduced when increasing max phys
bits to 47.  We broke DEBUG_PAGEALLOC completely.  The issue is that
the page table layout only supports up to 43-bits.

I'll brain storm about this over the weekend.
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