Re: [PATCH 07/31] sched, numa, mm, s390/thp: Implement pmd_pgprot()for s390

[Mel Gorman]

On Thu, Oct 25, 2012 at 02:16:24PM +0200, Peter Zijlstra wrote:
> From: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx>
> 
> This patch adds an implementation of pmd_pgprot() for s390,
> in preparation to future THP changes.
> 

The additional pmd_pgprot implementations only are necessary if we want
to preserve the PROT_NONE protections across a split but that somewhat
forces that PROT_NONE be used as the protection bit across all
architectures. Is that possible? I think I would prefer that
prot-protection-across-splits just went away until it was proven
necessary and potentially recoded in terms of _PAGE_NUMA and friends
instead.

-- 
Mel Gorman
SUSE Labs
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