From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933749AbdDZSZt (ORCPT ); Wed, 26 Apr 2017 14:25:49 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:40255 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933597AbdDZSZl (ORCPT ); Wed, 26 Apr 2017 14:25:41 -0400 Date: Wed, 26 Apr 2017 11:25:38 -0700 From: "Paul E. McKenney" To: Mike Galbraith Cc: LKML Subject: Re: TREE_SRCU slows hotplug by factor ~16 Reply-To: paulmck@linux.vnet.ibm.com References: <20170424162442.GI3956@linux.vnet.ibm.com> <20170425223642.GA10931@linux.vnet.ibm.com> <20170426143145.GA5683@linux.vnet.ibm.com> <1493220380.6176.2.camel@gmx.de> <20170426154402.GT3956@linux.vnet.ibm.com> <1493221799.6176.5.camel@gmx.de> <1493228757.4132.2.camel@gmx.de> <20170426175544.GW3956@linux.vnet.ibm.com> <20170426175610.GA6491@linux.vnet.ibm.com> <1493230330.4132.4.camel@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1493230330.4132.4.camel@gmx.de> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 x-cbid: 17042618-0040-0000-0000-0000032718B7 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006978; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000208; SDB=6.00852838; UDB=6.00421599; IPR=6.00631675; BA=6.00005313; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015189; XFM=3.00000013; UTC=2017-04-26 18:25:39 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17042618-0041-0000-0000-0000071B32A8 Message-Id: <20170426182537.GX3956@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-04-26_13:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1704260308 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 26, 2017 at 08:12:10PM +0200, Mike Galbraith wrote: > On Wed, 2017-04-26 at 10:56 -0700, Paul E. McKenney wrote: > > > > OK, I do need to do more work. My current guess is that I should have > > > set the default for srcutree.exp_holdoff to 25*1000 instead of 50*1000. > > > But I am sure that further data will show me the error of my ways. ;-) > > I can give that a go tomorrow (too crispy now). Sounds good! I think that validating a 75x reduction is good for today. Get some rest! > > Oh, and my I add your Tested-by? > > Sure. Done, thank you! Thanx, Paul