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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org
Cc: linuxppc-dev@lists.ozlabs.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [PATCH -V2 04/26] powerpc: Reduce the PTE_INDEX_SIZE
Date: Wed,  6 Mar 2013 11:40:05 +0530	[thread overview]
Message-ID: <1362550227-575-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1362550227-575-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>

From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>

This make one PMD cover 16MB range. That helps in easier implementation of THP
on power. THP core code make use of one pmd entry to track the huge page and
the range mapped by a single pmd entry should be equal to the huge page size
supported by the hardware.

Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/pgtable-ppc64-64k.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/include/asm/pgtable-ppc64-64k.h b/arch/powerpc/include/asm/pgtable-ppc64-64k.h
index be4e287..3c529b4 100644
--- a/arch/powerpc/include/asm/pgtable-ppc64-64k.h
+++ b/arch/powerpc/include/asm/pgtable-ppc64-64k.h
@@ -4,10 +4,10 @@
 #include <asm-generic/pgtable-nopud.h>
 
 
-#define PTE_INDEX_SIZE  12
+#define PTE_INDEX_SIZE  8
 #define PMD_INDEX_SIZE  12
 #define PUD_INDEX_SIZE	0
-#define PGD_INDEX_SIZE  6
+#define PGD_INDEX_SIZE  10
 
 #ifndef __ASSEMBLY__
 #define PTE_TABLE_SIZE	(sizeof(real_pte_t) << PTE_INDEX_SIZE)
-- 
1.7.10

  parent reply	other threads:[~2013-03-06  6:10 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-06  6:10 [PATCH -V2 00/26]T HP support for PPC64 Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 01/26] powerpc: Use signed formatting when printing error Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 02/26] powerpc: Save DAR and DSISR in pt_regs on MCE Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 03/26] powerpc: Don't hard code the size of pte page Aneesh Kumar K.V
2013-03-06  6:10 ` Aneesh Kumar K.V [this message]
2013-03-06  6:10 ` [PATCH -V2 05/26] powerpc: Move the pte free routines from common header Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 06/26] powerpc: Reduce PTE table memory wastage Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 07/26] powerpc: Add size argument to pgtable_cache_add Aneesh Kumar K.V
2013-03-13  2:47   ` Paul Mackerras
2013-03-13  9:25     ` Aneesh Kumar K.V
2013-03-13 11:34       ` Paul Mackerras
2013-03-06  6:10 ` [PATCH -V2 08/26] powerpc: Clarify __pgtable_cache_add by renaming shift to index Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 09/26] powerpc: Use encode avpn where we need only avpn values Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 10/26] powerpc: Decode the pte-lp-encoding bits correctly Aneesh Kumar K.V
2013-03-13  4:09   ` Paul Mackerras
2013-03-06  6:10 ` [PATCH -V2 11/26] powerpc: Fix hpte_decode to use the correct decoding for page sizes Aneesh Kumar K.V
2013-03-13  2:56   ` Paul Mackerras
2013-03-06  6:10 ` [PATCH -V2 12/26] powerpc: Return all the valid pte ecndoing in KVM_PPC_GET_SMMU_INFO ioctl Aneesh Kumar K.V
2013-03-13  4:11   ` Paul Mackerras
2013-03-06  6:10 ` [PATCH -V2 13/26] powerpc: Update tlbie/tlbiel as per ISA doc Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 14/26] powerpc: print both base and actual page size on hash failure Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 15/26] powerpc: Print page size info during boot Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 16/26] mm/THP: HPAGE_SHIFT is not a #define on some arch Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 17/26] mm/THP: Add pmd args to pgtable deposit and withdraw APIs Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 18/26] mm/THP: withdraw the pgtable after pmdp related operations Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 19/26] powerpc/THP: Implement transparent huge pages for ppc64 Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 20/26] powerpc/THP: Differentiate THP PMD entries from HUGETLB PMD entries Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 21/26] powerpc/THP: Add code to handle HPTE faults for large pages Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 22/26] powerpc: Handle huge page in perf callchain Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 23/26] powerpc/THP: hypervisor require few WIMG bit set Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 24/26] powerpc/THP: get_user_pages_fast changes Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 25/26] powerpc/THP: Enable THP on PPC64 Aneesh Kumar K.V
2013-03-06  6:10 ` [PATCH -V2 26/26] powerpc: Optimize hugepage invalidate Aneesh Kumar K.V

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