Re: [PATCH 01/11] x86/mm/pat: Don't free PGD entries on memory unmap

[Linus Torvalds]

On Mon, Sep 21, 2015 at 11:23 PM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
>
> This complicates PGD management, so don't do this. We can keep the
> PGD mapped and the PUD table all clear - it's only a single 4K page
> per 512 GB of memory mapped.

I'm ok with this just from a "it removes code" standpoint.  That said,
some of the other patches here make me go "hmm". I'll answer them
separately.

                  Linus
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