From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752093AbcF0X4X (ORCPT ); Mon, 27 Jun 2016 19:56:23 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:51591 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752002AbcF0X4V (ORCPT ); Mon, 27 Jun 2016 19:56:21 -0400 X-IBM-Helo: d03dlp01.boulder.ibm.com X-IBM-MailFrom: paulmck@linux.vnet.ibm.com Date: Mon, 27 Jun 2016 16:56:16 -0700 From: "Paul E. McKenney" To: Thomas Gleixner Cc: LKML , Ingo Molnar , Peter Zijlstra , Eric Dumazet , Frederic Weisbecker , Chris Mason , Arjan van de Ven , rt@linutronix.de, Rik van Riel , Linus Torvalds , George Spelvin , Len Brown , Josh Triplett Subject: Re: [patch V3 00/22] timer: Refactor the timer wheel Reply-To: paulmck@linux.vnet.ibm.com References: <20160624140325.554996200@linutronix.de> <20160627042236.GC4309@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160627042236.GC4309@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16062723-0028-0000-0000-0000050CCC69 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16062723-0029-0000-0000-00002D0AA7BE Message-Id: <20160627235616.GA18544@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-06-27_15:,, 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=8.0.1-1604210000 definitions=main-1606270238 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Jun 26, 2016 at 09:22:36PM -0700, Paul E. McKenney wrote: > On Fri, Jun 24, 2016 at 02:32:00PM -0000, Thomas Gleixner wrote: > > This is the third version of the timer wheel rework series. The previous > > versions can be found here: > > > > V1: http://lkml.kernel.org/r/20160613070440.950649741@linutronix.de > > V2: http://lkml.kernel.org/r/20160617121134.417319325@linutronix.de > > > > The series is also available in git: > > > > git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.timers > > > > Changes vs. V2: > > > > - Removed the 1000Hz granularity reduction to 4ms. Eric explained that > > datacenter workloads require the granularity in the first level wheel. > > > > - Fixed the typo in tilepro. > > > > - Converted sigtimedwait() to hrtimers > > > > - To avoid the cascading I extended the wheel by another level. This removes > > the rarely executed cascading code path, but increases the storage size for > > HZ>100 slightly. If the tiny folks care, there is an simple option to cut > > the storage size in half for the price of reduced granularity. > > > > Thanks, > > And this series avoids the strange SRCU behavior that I saw with the > last version. So looks to be getting there! > > I will be torturing it more vigorously, but looking good so far. And from RCU and rcutorture perspectives: Tested-by: Paul E. McKenney Thanx, Paul > > tglx > > > > ---- > > arch/x86/kernel/apic/x2apic_uv_x.c | 4 > > arch/x86/kernel/cpu/mcheck/mce.c | 4 > > block/genhd.c | 5 > > drivers/cpufreq/powernv-cpufreq.c | 5 > > drivers/mmc/host/jz4740_mmc.c | 2 > > drivers/net/ethernet/tile/tilepro.c | 4 > > drivers/power/bq27xxx_battery.c | 5 > > drivers/tty/metag_da.c | 4 > > drivers/tty/mips_ejtag_fdc.c | 4 > > drivers/usb/host/ohci-hcd.c | 1 > > drivers/usb/host/xhci.c | 2 > > include/linux/list.h | 10 > > include/linux/timer.h | 34 - > > kernel/signal.c | 24 > > kernel/time/tick-internal.h | 1 > > kernel/time/tick-sched.c | 46 - > > kernel/time/timer.c | 1096 +++++++++++++++++++++--------------- > > lib/random32.c | 1 > > net/ipv4/inet_connection_sock.c | 7 > > net/ipv4/inet_timewait_sock.c | 5 > > 20 files changed, 734 insertions(+), 530 deletions(-) > > > >