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List:       linuxppc-embedded
Subject:    Re: [PATCH -V7 08/18] powerpc: New hugepage directory format
From:       David Gibson <dwg () au1 ! ibm ! com>
Date:       2013-04-30 5:16:34
Message-ID: 20130430051634.GA20202 () truffula ! fritz ! box
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On Mon, Apr 29, 2013 at 01:07:29AM +0530, Aneesh Kumar K.V wrote:
> From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
> 
> Change the hugepage directory format so that we can have leaf ptes directly
> at page directory avoiding the allocation of hugepage directory.
> 
> With the new table format we have 3 cases for pgds and pmds:
> (1) invalid (all zeroes)
> (2) pointer to next table, as normal; bottom 6 bits == 0
> (4) hugepd pointer, bottom two bits == 00, next 4 bits indicate size of table
> 
> Instead of storing shift value in hugepd pointer we use mmu_psize_def index
> so that we can fit all the supported hugepage size in 4 bits
> 
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

Looks ok.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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