From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f46.google.com (mail-pb0-f46.google.com [209.85.160.46]) by kanga.kvack.org (Postfix) with ESMTP id 90ABF6B0036 for ; Thu, 15 May 2014 04:25:21 -0400 (EDT) Received: by mail-pb0-f46.google.com with SMTP id rq2so798988pbb.19 for ; Thu, 15 May 2014 01:25:21 -0700 (PDT) Received: from e28smtp09.in.ibm.com (e28smtp09.in.ibm.com. [122.248.162.9]) by mx.google.com with ESMTPS id rm9si2301340pbc.251.2014.05.15.01.25.19 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Thu, 15 May 2014 01:25:20 -0700 (PDT) Received: from /spool/local by e28smtp09.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 15 May 2014 13:55:17 +0530 Received: from d28relay05.in.ibm.com (d28relay05.in.ibm.com [9.184.220.62]) by d28dlp03.in.ibm.com (Postfix) with ESMTP id E77211258053 for ; Thu, 15 May 2014 13:54:16 +0530 (IST) Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay05.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id s4F8PNPd9240966 for ; Thu, 15 May 2014 13:55:23 +0530 Received: from d28av03.in.ibm.com (localhost [127.0.0.1]) by d28av03.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s4F8PC21001766 for ; Thu, 15 May 2014 13:55:13 +0530 Message-ID: <537479E7.90806@linux.vnet.ibm.com> Date: Thu, 15 May 2014 13:55:11 +0530 From: Madhavan Srinivasan MIME-Version: 1.0 Subject: Re: [PATCH V4 0/2] mm: FAULT_AROUND_ORDER patchset performance data for powerpc References: <1399541296-18810-1-git-send-email-maddy@linux.vnet.ibm.com> In-Reply-To: <1399541296-18810-1-git-send-email-maddy@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, x86@kernel.org Cc: benh@kernel.crashing.org, paulus@samba.org, kirill.shutemov@linux.intel.com, rusty@rustcorp.com.au, akpm@linux-foundation.org, riel@redhat.com, mgorman@suse.de, ak@linux.intel.com, peterz@infradead.org, mingo@kernel.org, dave.hansen@intel.com Hi Ingo, Do you have any comments for the latest version of the patchset. If not, kindly can you pick it up as is. With regards Maddy > 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(-) > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org