From patchwork Thu Apr 4 05:57:42 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Aneesh Kumar K.V" X-Patchwork-Id: 233627 X-Patchwork-Delegate: michael@ellerman.id.au Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id BA9342C0858 for ; Thu, 4 Apr 2013 17:01:55 +1100 (EST) Received: from e28smtp08.in.ibm.com (e28smtp08.in.ibm.com [122.248.162.8]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e28smtp08.in.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id A52232C00C2 for ; Thu, 4 Apr 2013 16:58:22 +1100 (EST) Received: from /spool/local by e28smtp08.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 4 Apr 2013 11:23:05 +0530 Received: from d28dlp03.in.ibm.com (9.184.220.128) by e28smtp08.in.ibm.com (192.168.1.138) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Thu, 4 Apr 2013 11:23:03 +0530 Received: from d28relay03.in.ibm.com (d28relay03.in.ibm.com [9.184.220.60]) by d28dlp03.in.ibm.com (Postfix) with ESMTP id 84678125804E for ; Thu, 4 Apr 2013 11:29:35 +0530 (IST) Received: from d28av01.in.ibm.com (d28av01.in.ibm.com [9.184.220.63]) by d28relay03.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r345w9HP49742036 for ; Thu, 4 Apr 2013 11:28:09 +0530 Received: from d28av01.in.ibm.com (loopback [127.0.0.1]) by d28av01.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r345wDOa026438 for ; Thu, 4 Apr 2013 05:58:14 GMT Received: from skywalker.in.ibm.com ([9.77.205.26]) by d28av01.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id r345wBIR026350; Thu, 4 Apr 2013 05:58:12 GMT From: "Aneesh Kumar K.V" To: benh@kernel.crashing.org, paulus@samba.org Subject: [PATCH -V5 04/25] powerpc: Reduce the PTE_INDEX_SIZE Date: Thu, 4 Apr 2013 11:27:42 +0530 Message-Id: <1365055083-31956-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1365055083-31956-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1365055083-31956-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13040405-2000-0000-0000-00000B9B7AA8 Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, "Aneesh Kumar K.V" X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: "Aneesh Kumar K.V" 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 hugepage and the range mapped by a single pmd entry should be equal to the hugepage size supported by the hardware. Acked-by: Paul Mackerras Signed-off-by: Aneesh Kumar K.V --- 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 -#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)