From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757121AbbCMP0h (ORCPT ); Fri, 13 Mar 2015 11:26:37 -0400 Received: from smtprelay0127.hostedemail.com ([216.40.44.127]:41265 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932178AbbCMPPW (ORCPT ); Fri, 13 Mar 2015 11:15:22 -0400 X-Session-Marker: 6E657665747340676F6F646D69732E6F7267 X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,,::::::::::::::::::::::::,RULES_HIT:355:379:560:871:988:989:1183:1260:1277:1312:1313:1314:1345:1516:1518:1519:1522:1534:1593:1594:1595:1596:1692:1730:1747:1777:1792:2392:2393:2559:2562:2828:3138:3139:3140:3141:3142:3876:3877:5007:6114:6261:6642:6748:7281:7901:9012:10004:10848:11604:11914:12517:12519:13895:14394:21080,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0 X-HE-Tag: wash62_68cb903056758 X-Filterd-Recvd-Size: 3672 Message-Id: <20150313151519.552895619@goodmis.org> User-Agent: quilt/0.61-1 Date: Fri, 13 Mar 2015 11:15:21 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-rt-users Cc: Thomas Gleixner , Carsten Emde , Sebastian Andrzej Siewior , John Kacur , Paul Gortmaker , "Paul E. McKenney" , Josh Triplett , Peter Zijlstra , Oleg Nesterov , Mike Galbraith Subject: [PATCH RT 27/31] timers: Track total number of timers in list References: <20150313151454.809081378@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Disposition: inline; filename=0027-timers-Track-total-number-of-timers-in-list.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.10.70-rt75-rc1 stable review patch. If anyone has any objections, please let me know. ------------------ From: "Paul E. McKenney" upstream commit: fff421580f512fc044cc7421fdff31a7a6997350 Currently, the tvec_base structure's ->active_timers field tracks only the non-deferrable timers, which means that even if ->active_timers is zero, there might well be deferrable timers in the list. This commit therefore adds an ->all_timers field to track all the timers, whether deferrable or not. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett Acked-by: Peter Zijlstra Reviewed-by: Oleg Nesterov Reviewed-by: Steven Rostedt Tested-by: Mike Galbraith Signed-off-by: Steven Rostedt --- kernel/timer.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/timer.c b/kernel/timer.c index 40cfa14131ca..23919c7c212f 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -84,6 +84,7 @@ struct tvec_base { unsigned long timer_jiffies; unsigned long next_timer; unsigned long active_timers; + unsigned long all_timers; struct tvec_root tv1; struct tvec tv2; struct tvec tv3; @@ -395,6 +396,7 @@ static void internal_add_timer(struct tvec_base *base, struct timer_list *timer) base->next_timer = timer->expires; base->active_timers++; } + base->all_timers++; } #ifdef CONFIG_TIMER_STATS @@ -674,6 +676,7 @@ detach_expired_timer(struct timer_list *timer, struct tvec_base *base) detach_timer(timer, true); if (!tbase_get_deferrable(timer->base)) base->active_timers--; + base->all_timers--; } static int detach_if_pending(struct timer_list *timer, struct tvec_base *base, @@ -688,6 +691,7 @@ static int detach_if_pending(struct timer_list *timer, struct tvec_base *base, if (timer->expires == base->next_timer) base->next_timer = base->timer_jiffies; } + base->all_timers--; return 1; } @@ -1678,6 +1682,7 @@ static int __cpuinit init_timers_cpu(int cpu) base->timer_jiffies = jiffies; base->next_timer = base->timer_jiffies; base->active_timers = 0; + base->all_timers = 0; return 0; } -- 2.1.4