From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qa0-f46.google.com (mail-qa0-f46.google.com [209.85.216.46]) by kanga.kvack.org (Postfix) with ESMTP id 9FD636B0032 for ; Thu, 22 Jan 2015 02:58:15 -0500 (EST) Received: by mail-qa0-f46.google.com with SMTP id j7so101737qaq.5 for ; Wed, 21 Jan 2015 23:58:15 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id u7si8080913qab.16.2015.01.21.23.58.13 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 21 Jan 2015 23:58:15 -0800 (PST) Date: Thu, 22 Jan 2015 15:57:42 +0800 From: WANG Chao Subject: Re: [PATCH] mm, vmacache: Add kconfig VMACACHE_SHIFT Message-ID: <20150122075742.GA11335@dhcp-129-179.nay.redhat.com> References: <1421908189-18938-1-git-send-email-chaowang@redhat.com> <1421912761.4903.22.camel@stgolabs.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1421912761.4903.22.camel@stgolabs.net> Sender: owner-linux-mm@kvack.org List-ID: To: Davidlohr Bueso Cc: Andrew Morton , Ingo Molnar , Peter Zijlstra , Michel Lespinasse , Rik van Riel , Mel Gorman , linux-mm@kvack.org, linux-kernel@vger.kernel.org Hi, Davidlohr On 01/21/15 at 11:46pm, Davidlohr Bueso wrote: > On Thu, 2015-01-22 at 14:29 +0800, WANG Chao wrote: > > Add a new kconfig option VMACACHE_SHIFT (as a power of 2) to specify the > > number of slots vma cache has for each thread. Range is chosen 0-4 (1-16 > > slots) to consider both overhead and performance penalty. Default is 2 > > (4 slots) as it originally is, which provides good enough balance. > > > > Nack. I don't feel comfortable making scalability features of core code > configurable. Out of respect, is this a general rule not making scalability features of core code configurable? Thanks WANG Chao -- 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