Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752495AbdCPOOt (ORCPT ); Thu, 16 Mar 2017 10:14:49 -0400 Received: from mga09.intel.com ([134.134.136.24]:22468 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752147AbdCPOOq (ORCPT ); Thu, 16 Mar 2017 10:14:46 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.36,172,1486454400"; d="scan'208";a="1123562160" Date: Thu, 16 Mar 2017 22:14:38 +0800 From: Aaron Lu To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Michal Hocko , Dave Hansen , Tim Chen , Andrew Morton , Ying Huang Subject: Re: [PATCH v2 0/5] mm: support parallel free of memory Message-ID: <20170316141437.GA16038@aaronlu.sh.intel.com> References: <1489568404-7817-1-git-send-email-aaron.lu@intel.com> <20170315141813.GB32626@dhcp22.suse.cz> <20170315154406.GF2442@aaronlu.sh.intel.com> <20170315162843.GA27197@dhcp22.suse.cz> <20170316073403.GE1661@aaronlu.sh.intel.com> <20170316135122.GF13054@aaronlu.sh.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170316135122.GF13054@aaronlu.sh.intel.com> User-Agent: Mutt/1.8.0 (2017-02-23) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 606 Lines: 14 On Thu, Mar 16, 2017 at 09:51:22PM +0800, Aaron Lu wrote: > Considering that we are mostly improving for memory intensive apps, the > default setting should probably be: max_active = node_number with each > worker freeing 2G memory. In case people want to give this setting a try, here is what to do. On 2-nodes EP: # echo 2 > /sys/devices/virtual/workqueue/batch_free_wq/max_active # echo 1030 > /sys/kernel/debug/parallel_free/max_gather_batch_count On 4-nodes EX: # echo 4 > /sys/devices/virtual/workqueue/batch_free_wq/max_active # echo 1030 > /sys/kernel/debug/parallel_free/max_gather_batch_count