From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758823AbdELSpm (ORCPT ); Fri, 12 May 2017 14:45:42 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:50077 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757582AbdELSpk (ORCPT ); Fri, 12 May 2017 14:45:40 -0400 Date: Fri, 12 May 2017 11:45:36 -0700 From: "Paul E. McKenney" To: Nicolas Pitre Cc: linux-kernel@vger.kernel.org, josh@joshtriplett.org Subject: Re: [PATCH RFC tip/core/rcu] Make SRCU be once again optional Reply-To: paulmck@linux.vnet.ibm.com References: <20170428211546.GA23590@linux.vnet.ibm.com> <20170429001040.GH3956@linux.vnet.ibm.com> <20170512184155.GA9482@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170512184155.GA9482@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 x-cbid: 17051218-2213-0000-0000-000001B682B4 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007051; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000211; SDB=6.00859624; UDB=6.00426128; IPR=6.00639207; BA=6.00005345; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015431; XFM=3.00000015; UTC=2017-05-12 18:45:38 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17051218-2214-0000-0000-0000561786E6 Message-Id: <20170512184536.GA10144@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-05-12_11:,, 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-1705120350 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 12, 2017 at 11:41:55AM -0700, Paul E. McKenney wrote: > On Fri, Apr 28, 2017 at 05:10:40PM -0700, Paul E. McKenney wrote: > > On Fri, Apr 28, 2017 at 05:51:15PM -0400, Nicolas Pitre wrote: > > > On Fri, 28 Apr 2017, Paul E. McKenney wrote: > > > > > > > Hello, Nicolas! > > > > > > > > Saw the TTY write up LWN and figured I should send this your way. > > > > It should be worth about 2K compared to current -next, which gave > > > > up the 2K compared to v4.10. So really getting things back to where > > > > they were. > > > > > > > > My current plan is to push this into v4.13. > > > > > > Excellent! > > > > > > If every maintainer finds a way to (optionally) reduce the size of the > > > code they maintain by 2K then we'll get a much smaller kernel pretty > > > soon. > > > > I would feel better if it wasn't me who had added the 2K, but then > > again, I do look forward to seeing a negative-sized kernel! ;-) > > And I am getting a lot of offlist pressure to remove both Tiny RCU and > Tiny SRCU. I am pushing back, but I might or might not prevail. In case > my pushback gets pushed back, do you have a -tiny tree or some such where > the code could go? And adding Josh Triplett on CC, who I should have CCed to start with. Thanx, Paul