From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3xcDtV16RvzDqY1 for ; Wed, 23 Aug 2017 01:26:41 +1000 (AEST) Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v7MFQAtT077728 for ; Tue, 22 Aug 2017 11:26:40 -0400 Received: from e11.ny.us.ibm.com (e11.ny.us.ibm.com [129.33.205.201]) by mx0a-001b2d01.pphosted.com with ESMTP id 2cgj1c0fvd-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 22 Aug 2017 11:26:39 -0400 Received: from localhost by e11.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 22 Aug 2017 11:26:38 -0400 Date: Tue, 22 Aug 2017 08:26:37 -0700 From: "Paul E. McKenney" To: Abdul Haleem Cc: Jonathan Cameron , David Miller , npiggin@gmail.com, mpe@ellerman.id.au, dzickus@redhat.com, sfr@canb.auug.org.au, linuxarm@huawei.com, tglx@linutronix.de, sparclinux@vger.kernel.org, akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, john.stultz@linaro.org Subject: Re: RCU lockup issues when CONFIG_SOFTLOCKUP_DETECTOR=n - any one else seeing this? Reply-To: paulmck@linux.vnet.ibm.com References: <20170821160605.5b1cc019@roar.ozlabs.ibm.com> <20170821111833.00006753@huawei.com> <20170822001928.74f01322@roar.ozlabs.ibm.com> <20170821.135504.1392954698746959868.davem@davemloft.net> <20170822084911.00000c23@huawei.com> <1503391892.3629.28.camel@abdul.in.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1503391892.3629.28.camel@abdul.in.ibm.com> Message-Id: <20170822152637.GA11320@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, Aug 22, 2017 at 02:21:32PM +0530, Abdul Haleem wrote: > On Tue, 2017-08-22 at 08:49 +0100, Jonathan Cameron wrote: > > On Mon, 21 Aug 2017 13:55:04 -0700 > > David Miller wrote: > > > > > From: Nicholas Piggin > > > Date: Tue, 22 Aug 2017 00:19:28 +1000 > > > > > > > Thanks here's an updated version with a couple more bugs fixed. If > > > > you could try testing, that would be much appreciated. > > > > > > I'm not getting RCU stalls on sparc64 any longer with this patch. > > > > > > I'm really happy you guys were able to figure out what was going > > > wrong. :-) > > > > > > Feel free to add my Tested-by: > > > > > > > Like wise - 16 hours of clean run with the latest > > > > Tested-by: Jonathan Cameron > > > > Thanks for all the hard work everyone put into this one, great to > > cross it off the list! > > > > Jonathan > > > > No more RCU stalls on PowerPC, system is clean when idle or with some > test runs. > > Thank you all for your time and efforts in fixing this. > > Reported-and-Tested-by: Abdul Haleem I am still seeing failures, but then again I am running rcutorture with lots of CPU hotplug activity. So I am probably seeing some other bug, though it still looks a lot like a lost timer. Thanx, Paul