From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e28smtp04.in.ibm.com (e28smtp04.in.ibm.com [122.248.162.4]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id B3023140094 for ; Thu, 8 May 2014 19:28:30 +1000 (EST) Received: from /spool/local by e28smtp04.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 8 May 2014 14:58:24 +0530 Received: from d28relay05.in.ibm.com (d28relay05.in.ibm.com [9.184.220.62]) by d28dlp01.in.ibm.com (Postfix) with ESMTP id 83E1FE0045 for ; Thu, 8 May 2014 14:58:49 +0530 (IST) Received: from d28av02.in.ibm.com (d28av02.in.ibm.com [9.184.220.64]) by d28relay05.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id s489SUd53670388 for ; Thu, 8 May 2014 14:58:30 +0530 Received: from d28av02.in.ibm.com (localhost [127.0.0.1]) by d28av02.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s489SIia027839 for ; Thu, 8 May 2014 14:58:21 +0530 From: Madhavan Srinivasan To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, x86@kernel.org Subject: [PATCH V4 0/2] mm: FAULT_AROUND_ORDER patchset performance data for powerpc Date: Thu, 8 May 2014 14:58:14 +0530 Message-Id: <1399541296-18810-1-git-send-email-maddy@linux.vnet.ibm.com> Cc: riel@redhat.com, ak@linux.intel.com, peterz@infradead.org, rusty@rustcorp.com.au, dave.hansen@intel.com, Madhavan Srinivasan , paulus@samba.org, mgorman@suse.de, akpm@linux-foundation.org, mingo@kernel.org, kirill.shutemov@linux.intel.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Kirill A. Shutemov with 8c6e50b029 commit introduced vm_ops->map_pages() for mapping easy accessible pages around fault address in hope to reduce number of minor page faults. This patch creates infrastructure to modify the FAULT_AROUND_ORDER value using mm/Kconfig. This will enable architecture maintainers to decide on suitable FAULT_AROUND_ORDER value based on performance data for that architecture. First patch also defaults FAULT_AROUND_ORDER Kconfig element to 4. Second patch list out the performance numbers for powerpc (platform pseries) and initialize the fault around order variable for pseries platform of powerpc. V4 Changes: Replaced the BUILD_BUG_ON with VM_BUG_ON. Moved fault_around_pages() and fault_around_mask() functions outside of #ifdef CONFIG_DEBUG_FS. V3 Changes: Replaced FAULT_AROUND_ORDER macro to a variable to support arch's that supports sub platforms. Made changes in commit messages. V2 Changes: Created Kconfig parameter for FAULT_AROUND_ORDER Added check in do_read_fault to handle FAULT_AROUND_ORDER value of 0 Made changes in commit messages. Madhavan Srinivasan (2): mm: move FAULT_AROUND_ORDER to arch/ powerpc/pseries: init fault_around_order for pseries arch/powerpc/platforms/pseries/pseries.h | 2 ++ arch/powerpc/platforms/pseries/setup.c | 5 +++++ mm/Kconfig | 8 ++++++++ mm/memory.c | 25 ++++++------------------- 4 files changed, 21 insertions(+), 19 deletions(-) -- 1.7.10.4