From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755586AbbDNPSL (ORCPT ); Tue, 14 Apr 2015 11:18:11 -0400 Received: from mail-am1on0063.outbound.protection.outlook.com ([157.56.112.63]:44395 "EHLO emea01-am1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755132AbbDNPSB (ORCPT ); Tue, 14 Apr 2015 11:18:01 -0400 Authentication-Results: spf=fail (sender IP is 12.216.194.146) smtp.mailfrom=ezchip.com; ezchip.com; dkim=none (message not signed) header.d=none; From: Chris Metcalf To: "Peter Zijlstra (Intel)" , Frederic Weisbecker , "Paul E. McKenney" , "Rafael J. Wysocki" , Martin Schwidefsky , Ingo Molnar , CC: Chris Metcalf Subject: [PATCH v8 1/2] nohz: add tick_nohz_full_add_cpus_to() API Date: Tue, 14 Apr 2015 11:17:54 -0400 Message-ID: <1429024675-18938-1-git-send-email-cmetcalf@ezchip.com> X-Mailer: git-send-email 2.1.2 In-Reply-To: <20150414003711.GD6121@lerouge> References: <20150414003711.GD6121@lerouge> X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:12.216.194.146;CTRY:US;IPV:NLI;EFV:NLI;BMV:1;SFV:NSPM;SFS:(10009020)(6009001)(339900001)(199003)(189002)(62966003)(76176999)(2950100001)(106466001)(50986999)(50466002)(42186005)(77156002)(575784001)(86362001)(48376002)(92566002)(104016003)(36756003)(87936001)(6806004)(46102003)(19580395003)(33646002)(105606002)(19580405001)(4001410100001)(85426001)(50226001)(47776003)(229853001)(4001430100001);DIR:OUT;SFP:1101;SCL:1;SRVR:AM2PR02MB0771;H:ld-1.internal.tilera.com;FPR:;SPF:Fail;MLV:sfv;A:1;MX:1;LANG:en; MIME-Version: 1.0 Content-Type: text/plain X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:AM2PR02MB0771; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:(601004)(5005006)(5002010);SRVR:AM2PR02MB0771;BCL:0;PCL:0;RULEID:;SRVR:AM2PR02MB0771; X-Forefront-PRVS: 054642504A X-OriginatorOrg: ezchip.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Apr 2015 15:17:58.4427 (UTC) X-MS-Exchange-CrossTenant-Id: 0fc16e0a-3cd3-4092-8b2f-0a42cff122c3 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=0fc16e0a-3cd3-4092-8b2f-0a42cff122c3;Ip=[12.216.194.146];Helo=[ld-1.internal.tilera.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM2PR02MB0771 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This API is useful to modify a cpumask indicating some special nohz-type functionality so that the nohz cores are automatically added to that set. Acked-by: Frederic Weisbecker Signed-off-by: Chris Metcalf --- v8: Just include _add_cpus_to() in this patch set [Frederic] Add Frederic's Ack v7: no change here, just in part 2/2. v6: I think we may finally have accessor names that are OK v5: (skipped this patch) v4: update accessor names to make them clearer [PeterZ] v3: no change here, just in part 2/2. v2: put the "...set_cpus" API together with the change to init_sched_domains() so that they can go into the timer tree independently of other changes in my tree. include/linux/tick.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/tick.h b/include/linux/tick.h index ce655084ffe3..8d1754c0f694 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -186,6 +186,12 @@ static inline bool tick_nohz_full_cpu(int cpu) return cpumask_test_cpu(cpu, tick_nohz_full_mask); } +static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) +{ + if (tick_nohz_full_enabled()) + cpumask_or(mask, mask, tick_nohz_full_mask); +} + static inline void tick_nohz_full_remove_cpus_from(struct cpumask *mask) { if (tick_nohz_full_enabled()) @@ -200,6 +206,7 @@ extern void __tick_nohz_task_switch(struct task_struct *tsk); #else static inline bool tick_nohz_full_enabled(void) { return false; } static inline bool tick_nohz_full_cpu(int cpu) { return false; } +static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) { } static inline void tick_nohz_full_remove_cpus_from(struct cpumask *mask) { } static inline void __tick_nohz_full_check(void) { } static inline void tick_nohz_full_kick_cpu(int cpu) { } -- 2.1.2