From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755774AbdJJBTQ (ORCPT ); Mon, 9 Oct 2017 21:19:16 -0400 Received: from omzsmtpe01.verizonbusiness.com ([199.249.25.210]:15397 "EHLO omzsmtpe01.verizonbusiness.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754195AbdJJBTO (ORCPT ); Mon, 9 Oct 2017 21:19:14 -0400 From: "Levin, Alexander (Sasha Levin)" X-Host: pioneer.tdc.vzwcorp.com To: Peter Zijlstra CC: Sasha Levin , Ingo Molnar , Thomas Gleixner , "linux-kernel@vger.kernel.org List" Subject: Re: [PATCH 3/4] sched: WARN when migrating to an offline CPU Thread-Topic: [PATCH 3/4] sched: WARN when migrating to an offline CPU Thread-Index: AQHTQWWxmPlss1t9xE+Upu66GnCzXA== Date: Tue, 10 Oct 2017 01:18:34 +0000 Message-ID: <20171010011832.sbfbhqss5can5lga@sasha-lappy> References: <20170907150614.094206976@infradead.org> <20170928103541.2adtamm7koi4k5zh@hirez.programming.kicks-ass.net> <20170928110308.lvpxf5fw7crbwsg6@sasha-lappy> <20170928114249.qddcf4pntvuttswd@hirez.programming.kicks-ass.net> <20170929111126.xdqcgye7iyvphb6a@hirez.programming.kicks-ass.net> <20171007020723.lj2mitq2apgsyo5s@sasha-lappy> <20171007091517.m5yghveaw4mmnjh2@hirez.programming.kicks-ass.net> <20171007174327.ky6g5viokxg5ysdm@sasha-lappy> <20171009080445.33dif4wraymljmr2@hirez.programming.kicks-ass.net> In-Reply-To: <20171009080445.33dif4wraymljmr2@hirez.programming.kicks-ass.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: NeoMutt/20170113 (1.7.2) x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.144.60.250] Content-Type: text/plain; charset="us-ascii" Content-ID: <3BFE79634DA5664EB608C5B0F33A0788@vzwcorp.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by nfs id v9A1JLec030152 On Mon, Oct 09, 2017 at 10:04:45AM +0200, Peter Zijlstra wrote: >On Sat, Oct 07, 2017 at 05:43:32PM +0000, Levin, Alexander (Sasha Levin) wrote: >> On Sat, Oct 07, 2017 at 11:15:17AM +0200, Peter Zijlstra wrote: >> >On Sat, Oct 07, 2017 at 02:07:26AM +0000, Levin, Alexander (Sasha Levin) wrote: >> >> And quite a few lines of your added trace (lmk if you need more, or all): >> > >> >Yeah, could you please upload all of it somewhere? That chunk didn't >> >include any hotplug bits at all. >> >> Attached. It's the stack trace followed by everything else. > >Much thanks, clue: > >[ 2073.495414] NOHZ: local_softirq_pending 202 -- (TIMER_SOFTIRQ | RCU_SOFTIRQ) > >cpuhp/2-22 [002] .... 104.797971: sched_cpu_deactivate: not-active: 2 mask: 0-1,3-4,6-7,9 > >cpuhp/2-22 [002] .... 104.825166: sched_cpu_deactivate: rcu-sync: 2 > >migration/2-24 [002] ..s1 104.855994: rebalance_domains: rcu-read-lock: 2 >migration/2-24 [002] ..s1 104.856000: load_balance: dst_cpu: 2 cpus: 6 > > >supposed fix; could you please verify? Patch works, thanks! -- Thanks, Sasha