From mboxrd@z Thu Jan 1 00:00:00 1970 From: paulmck@linux.vnet.ibm.com (Paul E. McKenney) Date: Tue, 22 Aug 2017 08:26:37 -0700 Subject: RCU lockup issues when CONFIG_SOFTLOCKUP_DETECTOR=n - any one else seeing this? In-Reply-To: <1503391892.3629.28.camel@abdul.in.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> Message-ID: <20170822152637.GA11320@linux.vnet.ibm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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