From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Hoffmann Subject: omap: panda rcu stall on 3.10.1 Date: Fri, 30 Aug 2013 08:27:32 +0200 Message-ID: <52203B54.70902@gmail.com> References: <521DA180.9010306@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <521DA180.9010306@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org Cc: paulmck@linux.vnet.ibm.com List-Id: linux-omap@vger.kernel.org > This also went to: linaro-kernel@lists.linaro.org Hi, current linaro kernel on 13.07 (3.10.1.0-1-linaro-omap) shows stack below. System is generally quite unstable. Light usage (postfix+dovecot...) Full dmesg here: https://dl.dropboxusercontent.com/u/21820416/rcu.stall.panda Rgds, Chris [ 4538.880432] INFO: rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 0, t=2103 jiffies, g=1649, c=1648, q=18) [ 4538.891723] Backtrace for cpu 0 (current): [ 4538.891723] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.1.0-1-linaro-omap #1ubuntu1~ci+130723003933-Ubuntu [ 4538.891754] [] (unwind_backtrace+0x1/0x9c) from [] (show_stack+0x11/0x14) [ 4538.891815] [] (show_stack+0x11/0x14) from [] (smp_send_all_cpu_backtrace+0x49/0x98) [ 4538.891815] [] (smp_send_all_cpu_backtrace+0x49/0x98) from [] (rcu_check_callbacks+0x439/0x4ac) [ 4538.891815] [] (rcu_check_callbacks+0x439/0x4ac) from [] (update_process_times+0x2d/0x4c) [ 4538.891876] [] (update_process_times+0x2d/0x4c) from [] (tick_sched_handle+0x35/0x40) [ 4538.891906] [] (tick_sched_handle+0x35/0x40) from [] (tick_sched_timer+0x31/0x54) [ 4538.891937] [] (tick_sched_timer+0x31/0x54) from [] (__run_hrtimer+0x5b/0x138) [ 4538.891937] [] (__run_hrtimer+0x5b/0x138) from [] (hrtimer_interrupt+0xdb/0x22c) [ 4538.891967] [] (hrtimer_interrupt+0xdb/0x22c) from [] (twd_handler+0x1b/0x28) [ 4538.891998] [] (twd_handler+0x1b/0x28) from [] (handle_percpu_devid_irq+0x4d/0xac) [ 4538.891998] [] (handle_percpu_devid_irq+0x4d/0xac) from [] (generic_handle_irq+0x19/0x24) [ 4538.892028] [] (generic_handle_irq+0x19/0x24) from [] (handle_IRQ+0x29/0x68) [ 4538.892059] [] (handle_IRQ+0x29/0x68) from [] (gic_handle_irq+0x27/0x50) [ 4538.892059] [] (gic_handle_irq+0x27/0x50) from [] (__irq_svc+0x3b/0x5c) [ 4538.892059] Exception stack(0xc06e3f68 to 0xc06e3fb0) [ 4538.892059] 3f60: 00000000 00000000 00000000 00000000 c06e2000 c075f130 [ 4538.892120] 3f80: c06e2000 c075ea93 c075f130 c06ea594 c045c2e0 c06e2000 c0fe5908 c06e3fb0 [ 4538.892120] 3fa0: c007bab1 c0058b48 400f0133 ffffffff [ 4538.892120] [] (__irq_svc+0x3b/0x5c) from [] (cpu_startup_entry+0xbc/0x164) [ 4538.892120] [] (cpu_startup_entry+0xbc/0x164) from [] (start_kernel+0x251/0x2ac) [ 4538.892120] [ 4538.892120] sending IPI to all other CPUs: [ 4538.892211] IPI backtrace for cpu 1 [ 4538.892211] [ 4538.892242] CPU: 1 PID: 2064 Comm: clamd Not tainted 3.10.1.0-1-linaro-omap #1ubuntu1~ci+130723003933-Ubuntu [ 4538.892242] task: edb09500 ti: ec91e000 task.ti: ec91e000 [ 4538.892272] PC is at 0xb6e2f0d4 [ 4538.892272] LR is at 0xb6eeec01 [ 4538.892272] pc : [] lr : [] psr: 000f0130 [ 4538.892272] sp : be8b472c ip : 62323337 fp : 0000684a [ 4538.892303] r10: 0084d750 r9 : 00000200 r8 : e86d6a2f [ 4538.892303] r7 : 0a0a0a0a r6 : 69393e32 r5 : 0080bf24 r4 : 0080bf28 [ 4538.892333] r3 : 81010100 r2 : 63333438 r1 : 0000000a r0 : 0080bf24 [ 4538.892333] Flags: nzcv IRQs on FIQs on Mode USER_32 ISA Thumb Segment user [ 4538.892333] Control: 50c5387d Table: acbd404a DAC: 55555555 [ 4538.892364] [ 4538.892364] R8: 0xe86d69af: [ 4538.892364] 69ac 6a6f7254 412e6e61 746e6567 3939332d 00303934 b1aa3270 25060000 47a83ca7 [ 4538.892395] 69cc e4ebc453 91ad979e 23363f8b fd49d9d0 773b48ba ad58f7d3 04c351eb 96e4414f [ 4538.892395] 69ec 7e1a3ac7 f39072a5 e362cedb b119b3e0 b595375e b2137762 b19f99a8 b10dc638 [ 4538.892395] 6a0c 18060000 2e6e6957 6a6f7254 412e6e61 746e6567 3939332d 00303534 b23ade28 [ 4538.892395] 6a2c 18060000 2e6e6957 6a6f7254 462e6e61 61656b61 37342d76 00373131 ac58376e [ 4538.892395] 6a4c 72542e6e 6e616a6f 3434382e 35313336 3e55c600 412e6eb2 72617764 61472e65 [ 4538.892517] 6a6c 6176656d 2d65636e 34393132 55b20037 1604b173 2e6e6957 6a6f7254 462e6e61 [ 4538.892547] 6a8c 61656b61 37342d76 00343131 b652e2c0 72542e6e 6e616a6f 7075532e 756a7265 [ 4538.892547] 6aac 322d6e61 fb003731 15b23a2b 2e6e6957 6a6f7254 412e6e61 746e6567 3939332d [ 4538.892547] CPU: 1 PID: 2064 Comm: clamd Not tainted 3.10.1.0-1-linaro-omap #1ubuntu1~ci+130723003933-Ubuntu [ 4538.892547] [] (unwind_backtrace+0x1/0x9c) from [] (show_stack+0x11/0x14) [ 4538.892639] [] (show_stack+0x11/0x14) from [] (handle_IPI+0xd5/0x158) [ 4538.892669] [] (handle_IPI+0xd5/0x158) from [] (gic_handle_irq+0x4b/0x50) [ 4538.892669] [] (gic_handle_irq+0x4b/0x50) from [] (__irq_usr+0x49/0x60) [ 4538.892700] Exception stack(0xec91ffb0 to 0xec91fff8) [ 4538.892700] ffa0: 0080bf24 0000000a 63333438 81010100 [ 4538.892730] ffc0: 0080bf28 0080bf24 69393e32 0a0a0a0a e86d6a2f 00000200 0084d750 0000684a [ 4538.892730] ffe0: 62323337 be8b472c b6eeec01 b6e2f0d4 000f0130 ffffffff