i.MX ProcessorsのトピックRe: meta-fsl-arm/linux-rt rcu_preempt stack errors (IMX.6D)

i.MX ProcessorsのトピックRe: meta-fsl-arm/linux-rt rcu_preempt stack errors (IMX.6D) https://community.nxp.com/t5/i-MX-Processors/meta-fsl-arm-linux-rt-rcu-preempt-stack-errors-IMX-6D/m-p/413965#M62037 <HTML><HEAD></HEAD><BODY><P>Hi Phill</P><P></P><P>it has much more gpu fixes as described in</P><P></P><P><A href="http://cache.freescale.com/files/32bit/doc/support_info/IMX6L31428101RN.pdf?fasp=1&WT_TYPE=Supporting%20Information&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation&fileExt=.pdf">IMX6L31428101RN</A>  i.MX 6 Yocto Project L3.14.28_1.0.1 Patch Release Notes -Release Notes</P><P></P><P>Best regards</P><P>igor</P></BODY></HTML> Wed, 03 Jun 2015 04:38:07 GMT igorpadykov 2015-06-03T04:38:07Z meta-fsl-arm/linux-rt rcu_preempt stack errors (IMX.6D) https://community.nxp.com/t5/i-MX-Processors/meta-fsl-arm-linux-rt-rcu-preempt-stack-errors-IMX-6D/m-p/413962#M62034 <HTML><HEAD></HEAD><BODY><P>Hi All,</P><P>I am attempting to get the rt kernel working on my project, it appears to be throwing stack errors quite frequently. I think the following log is several errors, but is the most common error I get.</P><P>The hardware design is based on the SabreSD reference design, I am using a dual core chip, and have linked in custom drivers for hardware, these are denoted by the `lx_` in the module name.</P><P>The stack errors occur while running a QT program with a full GUI and several hardware interaction operations + threads.</P><P></P><P>The Kernel is built using Yocto and the meta-fsl-arm recipes.</P><P></P><P>Basically, looking for some help debugging this. I don't have a lot of Linux development under my belt. Have I missed an RT config file/setting during compile time? Am I doing things wrong in my QT application?</P><P></P><P>Stack Traces:</P><P></P><P style="padding-left: 30px;">BUG: scheduling while atomic: swapper/1/0/0x00000002</P><P style="padding-left: 30px;">Modules linked in: g_ffs libcomposite configfs lx_max11646(O) lx_vcnl(O) lx_sht21(O) wl18xx(O) wlcore(O) mac80211(O) cfg80211(O) wlcore_sdio(O) compat(O)</P><P style="padding-left: 30px;">Preemption disabled at:[<  (null)>]   (null)</P><P style="padding-left: 30px;"></P><P style="padding-left: 30px;"></P><P style="padding-left: 30px;">CPU: 1 PID: 0 Comm: swapper/1 Tainted: G        W  O 3.10.17-rt12-1.0.0_ga+g232293e #1</P><P style="padding-left: 30px;">[<8001476c>] (unwind_backtrace+0x0/0x134) from [<80012160>] (show_stack+0x10/0x14)</P><P style="padding-left: 30px;">[<80012160>] (show_stack+0x10/0x14) from [<8056522c>] (__schedule_bug+0x9c/0xb0)</P><P style="padding-left: 30px;">[<8056522c>] (__schedule_bug+0x9c/0xb0) from [<8056971c>] (__schedule+0x434/0x4a8)</P><P style="padding-left: 30px;">[<8056971c>] (__schedule+0x434/0x4a8) from [<805697c4>] (schedule+0x34/0xa4)</P><P style="padding-left: 30px;">[<805697c4>] (schedule+0x34/0xa4) from [<8056a394>] (rt_spin_lock_slowlock+0xc0/0x29c)</P><P style="padding-left: 30px;">[<8056a394>] (rt_spin_lock_slowlock+0xc0/0x29c) from [<800344c8>] (lock_timer_base.isra.29+0x2c/0x4c)</P><P style="padding-left: 30px;">[<800344c8>] (lock_timer_base.isra.29+0x2c/0x4c) from [<8003497c>] (del_timer+0x28/0x58)</P><P style="padding-left: 30px;">[<8003497c>] (del_timer+0x28/0x58) from [<803d4170>] (cpufreq_interactive_idle_notifier+0x168/0x180)</P><P style="padding-left: 30px;">[<803d4170>] (cpufreq_interactive_idle_notifier+0x168/0x180) from [<8004b8fc>] (notifier_call_chain+0x44/0x84)</P><P style="padding-left: 30px;">[<8004b8fc>] (notifier_call_chain+0x44/0x84) from [<8004bb90>] (atomic_notifier_call_chain+0x34/0x48)</P><P style="padding-left: 30px;">[<8004bb90>] (atomic_notifier_call_chain+0x34/0x48) from [<8000f8c0>] (arch_cpu_idle+0xc/0x54)</P><P style="padding-left: 30px;">[<8000f8c0>] (arch_cpu_idle+0xc/0x54) from [<8005e770>] (cpu_startup_entry+0xfc/0x160)</P><P style="padding-left: 30px;">[<8005e770>] (cpu_startup_entry+0xfc/0x160) from [<105616a4>] (0x105616a4)</P><P style="padding-left: 30px;">bad: scheduling from the idle thread!</P><P style="padding-left: 30px;">CPU: 1 PID: 0 Comm: swapper/1 Tainted: G        W  O 3.10.17-rt12-1.0.0_ga+g232293e #1</P><P style="padding-left: 30px;">[<8001476c>] (unwind_backtrace+0x0/0x134) from [<80012160>] (show_stack+0x10/0x14)</P><P style="padding-left: 30px;">[<80012160>] (show_stack+0x10/0x14) from [<80055524>] (dequeue_task_idle+0x1c/0x28)</P><P style="padding-left: 30px;">[<80055524>] (dequeue_task_idle+0x1c/0x28) from [<8004f4ec>] (dequeue_task+0x2c/0x4c)</P><P style="padding-left: 30px;">[<8004f4ec>] (dequeue_task+0x2c/0x4c) from [<805693d0>] (__schedule+0xe8/0x4a8)</P><P style="padding-left: 30px;">[<805693d0>] (__schedule+0xe8/0x4a8) from [<805697c4>] (schedule+0x34/0xa4)</P><P style="padding-left: 30px;">[<805697c4>] (schedule+0x34/0xa4) from [<8056a394>] (rt_spin_lock_slowlock+0xc0/0x29c)</P><P style="padding-left: 30px;">[<8056a394>] (rt_spin_lock_slowlock+0xc0/0x29c) from [<800344c8>] (lock_timer_base.isra.29+0x2c/0x4c)</P><P style="padding-left: 30px;">[<800344c8>] (lock_timer_base.isra.29+0x2c/0x4c) from [<8003497c>] (del_timer+0x28/0x58)</P><P style="padding-left: 30px;">[<8003497c>] (del_timer+0x28/0x58) from [<803d4170>] (cpufreq_interactive_idle_notifier+0x168/0x180)</P><P style="padding-left: 30px;">[<803d4170>] (cpufreq_interactive_idle_notifier+0x168/0x180) from [<8004b8fc>] (notifier_call_chain+0x44/0x84)</P><P style="padding-left: 30px;">[<8004b8fc>] (notifier_call_chain+0x44/0x84) from [<8004bb90>] (atomic_notifier_call_chain+0x34/0x48)</P><P style="padding-left: 30px;">[<8004bb90>] (atomic_notifier_call_chain+0x34/0x48) from [<8000f8c0>] (arch_cpu_idle+0xc/0x54)</P><P style="padding-left: 30px;">[<8000f8c0>] (arch_cpu_idle+0xc/0x54) from [<8005e770>] (cpu_startup_entry+0xfc/0x160)</P><P style="padding-left: 30px;">[<8005e770>] (cpu_startup_entry+0xfc/0x160) from [<105616a4>] (0x105616a4)</P><P style="padding-left: 30px;">Unable to handle kernel NULL pointer dereference at virtual address 00000000</P><P style="padding-left: 30px;">pgd = 80004000</P><P style="padding-left: 30px;">[00000000] *pgd=00000000</P><P style="padding-left: 30px;">Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM</P><P style="padding-left: 30px;">Modules linked in: g_ffs libcomposite configfs lx_max11646(O) lx_vcnl(O) lx_sht21(O) wl18xx(O) wlcore(O) mac80211(O) cfg80211(O) wlcore_sdio(O) compat(O)</P><P style="padding-left: 30px;">CPU: 1 PID: 11 Comm: rcu_preempt Tainted: G        W  O 3.10.17-rt12-1.0.0_ga+g232293e #1</P><P style="padding-left: 30px;">task: a8072d00 ti: a8094000 task.ti: a8094000</P><P style="padding-left: 30px;">PC is at 0x0</P><P style="padding-left: 30px;">LR is at enqueue_task+0x2c/0x4c</P><P style="padding-left: 30px;">pc : [<00000000>]    lr : [<8004f4a0>]    psr: 80070093</P><P style="padding-left: 30px;">sp : a8095e20  ip : 00000420  fp : a8095e34</P><P style="padding-left: 30px;">r10: 80b62ea0  r9 : 80b571c0  r8 : 20070013</P><P style="padding-left: 30px;">r7 : a8073e04  r6 : 008eb000  r5 : 814421c0  r4 : 814421c0</P><P style="padding-left: 30px;">r3 : 00000000  r2 : 00000005  r1 : a8073a80  r0 : 814421c0</P><P style="padding-left: 30px;">Flags: Nzcv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel</P><P style="padding-left: 30px;">Control: 10c53c7d  Table: 3874004a  DAC: 00000015</P><P style="padding-left: 30px;">Process rcu_preempt (pid: 11, stack limit = 0xa8094238)</P><P style="padding-left: 30px;">Stack: (0xa8095e20 to 0xa8096000)</P><P style="padding-left: 30px;">5e20: 00000005 a8073a80 a8095e6c a8073a80 a8095e6c 80052d04 a8073084 20070013</P><P style="padding-left: 30px;">5e40: a8095f38 8056ad50 a8095f38 80bf04c0 00000001 80046944 80bf04c0 00000000</P><P style="padding-left: 30px;">5e60: a8094000 80b62ea0 a8095f38 8056a150 80bf04c0 800349f0 00000000 00000000</P><P style="padding-left: 30px;">5e80: 00000001 a8095ecc a8094010 80034a5c a8094030 a8072d00 80bf04c0 80b5a380</P><P style="padding-left: 30px;">5ea0: 80bf04c0 00083306 80bf04c0 a8095ecc 80bf04c0 80b5a380 80bf04c0 00083306</P><P style="padding-left: 30px;">5ec0: 80bf04c0 80568820 00000000 00000000 00200200 00083306 80bf04c0 80034310</P><P style="padding-left: 30px;">5ee0: a8072d00 ffffffff 00000000 00000002 80b6e250 a8094000 00000064 00000002</P><P style="padding-left: 30px;">5f00: 80b6e140 80082ef8 d2b5ffef 81438bec 80b5a380 80b6df40 80b6e16c 80b630f0</P><P style="padding-left: 30px;">5f20: 80b6e250 80b6e29c 80b9f47a a8094000 a8094000 00000000 a8095f38 a8095f38</P><P style="padding-left: 30px;">5f40: 80082c24 a805bee0 00000000 80b6e140 80082c24 00000000 00000000 00000000</P><P style="padding-left: 30px;">5f60: 00000000 80046124 7befcfd6 00000000 f1ff3ef6 80b6e140 00000000 00000000</P><P style="padding-left: 30px;">5f80: a8095f80 a8095f80 00000000 00000000 a8095f90 a8095f90 a8095fac a805bee0</P><P style="padding-left: 30px;">5fa0: 80046080 00000000 00000000 8000ed18 00000000 00000000 00000000 00000000</P><P style="padding-left: 30px;">5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000</P><P style="padding-left: 30px;">5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 feb7bf3b 7ffe1bff</P><P style="padding-left: 30px;">[<8004f4a0>] (enqueue_task+0x2c/0x4c) from [<80052d04>] (try_to_wake_up+0x1b8/0x338)</P><P style="padding-left: 30px;">[<80052d04>] (try_to_wake_up+0x1b8/0x338) from [<8056a150>] (rt_spin_lock_slowunlock+0x24/0xd4)</P><P style="padding-left: 30px;">[<8056a150>] (rt_spin_lock_slowunlock+0x24/0xd4) from [<800349f0>] (try_to_del_timer_sync+0x44/0x5c)</P><P style="padding-left: 30px;">[<800349f0>] (try_to_del_timer_sync+0x44/0x5c) from [<80034a5c>] (del_timer_sync+0x54/0xe8)</P><P style="padding-left: 30px;">[<80034a5c>] (del_timer_sync+0x54/0xe8) from [<80568820>] (schedule_timeout+0x150/0x1cc)</P><P style="padding-left: 30px;">[<80568820>] (schedule_timeout+0x150/0x1cc) from [<80082ef8>] (rcu_gp_kthread+0x2d4/0x5d8)</P><P style="padding-left: 30px;">[<80082ef8>] (rcu_gp_kthread+0x2d4/0x5d8) from [<80046124>] (kthread+0xa4/0xa8)</P><P style="padding-left: 30px;">[<80046124>] (kthread+0xa4/0xa8) from [<8000ed18>] (ret_from_fork+0x14/0x3c)</P><P style="padding-left: 30px;">Code: bad PC value</P><P style="padding-left: 30px;">---[ end trace 0000000000000007 ]---</P><P style="padding-left: 30px;">Kernel panic - not syncing: Fatal exception</P><P style="padding-left: 30px;">CPU0: stopping</P><P style="padding-left: 30px;">CPU: 0 PID: 393 Comm: irq/164-wl18xx Tainted: G      D W  O 3.10.17-rt12-1.0.0_ga+g232293e #1</P><P style="padding-left: 30px;">[<8001476c>] (unwind_backtrace+0x0/0x134) from [<80012160>] (show_stack+0x10/0x14)</P><P style="padding-left: 30px;">[<80012160>] (show_stack+0x10/0x14) from [<80013768>] (handle_IPI+0x108/0x160)</P><P style="padding-left: 30px;">[<80013768>] (handle_IPI+0x108/0x160) from [<80008584>] (gic_handle_irq+0x58/0x5c)</P><P style="padding-left: 30px;">[<80008584>] (gic_handle_irq+0x58/0x5c) from [<8000e840>] (__irq_svc+0x40/0x84)</P><P style="padding-left: 30px;">Exception stack(0xa8eb9db8 to 0xa8eb9e00)</P><P style="padding-left: 30px;">9da0:                                                       00000000 00000000</P><P style="padding-left: 30px;">9dc0: 00004fde 00004fdd 80bf04c0 80bf04c0 a8e5db90 00000000 a8eb9e8c a8b28f00</P><P style="padding-left: 30px;">9de0: a8d80480 80bf04c0 80b5a380 a8eb9e00 800504f4 8056ad24 80070113 ffffffff</P><P style="padding-left: 30px;">[<8000e840>] (__irq_svc+0x40/0x84) from [<8056ad24>] (_raw_spin_lock+0x38/0x4c)</P><P style="padding-left: 30px;">[<8056ad24>] (_raw_spin_lock+0x38/0x4c) from [<8056a308>] (rt_spin_lock_slowlock+0x34/0x29c)</P><P style="padding-left: 30px;">[<8056a308>] (rt_spin_lock_slowlock+0x34/0x29c) from [<800344c8>] (lock_timer_base.isra.29+0x2c/0x4c)</P><P style="padding-left: 30px;">[<800344c8>] (lock_timer_base.isra.29+0x2c/0x4c) from [<80034690>] (mod_timer+0x60/0x1c4)</P><P style="padding-left: 30px;">[<80034690>] (mod_timer+0x60/0x1c4) from [<8003f474>] (queue_delayed_work_on+0xfc/0x104)</P><P style="padding-left: 30px;">[<8003f474>] (queue_delayed_work_on+0xfc/0x104) from [<7f0ba6b0>] (wlcore_irq_locked+0xe4/0x348 [wlcore])</P><P style="padding-left: 30px;">[<7f0ba6b0>] (wlcore_irq_locked+0xe4/0x348 [wlcore]) from [<7f0bbee8>] (wlcore_irq+0xcc/0x18c [wlcore])</P><P style="padding-left: 30px;">[<7f0bbee8>] (wlcore_irq+0xcc/0x18c [wlcore]) from [<8007af24>] (irq_thread_fn+0x1c/0x40)</P><P style="padding-left: 30px;">[<8007af24>] (irq_thread_fn+0x1c/0x40) from [<8007b264>] (irq_thread+0x150/0x1b0)</P><P style="padding-left: 30px;">[<8007b264>] (irq_thread+0x150/0x1b0) from [<80046124>] (kthread+0xa4/0xa8)</P><P style="padding-left: 30px;">[<80046124>] (kthread+0xa4/0xa8) from [<8000ed18>] (ret_from_fork+0x14/0x3c)</P></BODY></HTML> Mon, 01 Jun 2015 04:54:32 GMT https://community.nxp.com/t5/i-MX-Processors/meta-fsl-arm-linux-rt-rcu-preempt-stack-errors-IMX-6D/m-p/413962#M62034 phillogden 2015-06-01T04:54:32Z Re: meta-fsl-arm/linux-rt rcu_preempt stack errors (IMX.6D) https://community.nxp.com/t5/i-MX-Processors/meta-fsl-arm-linux-rt-rcu-preempt-stack-errors-IMX-6D/m-p/413963#M62035 <HTML><HEAD></HEAD><BODY><P>Hi Phill</P><P></P><P>this may be caused by arm/gpu bugs fixed on 3.10.17 patches, please refer to attached doc</P><P></P><P><A href="http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=RDIMX6SABREBRD&fpsp=1&tab=Design_Tools_Tab">L3.10.17_1.0.2_iMX6QDLS_BUNDLE</A>  : i.MX 6Quad, i.MX 6Dual, i.MX 6DualLite,</P><P>i.MX 6Solo Linux Binary Demo Files and Linux BSP Documentation.</P><P><SPAN class="sizeText">Size (K): 717480 Format: gz Rev #: L3.10.17_1.0.2 Modified: 10/29/2014 </SPAN></P><P></P><P><SPAN class="sizeText">In general, recommended to use latest <A href="http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=RDIMX6SABREBRD&fpsp=1&tab=Design_Tools_Tab">L3.14.28_1.0.0_iMX6QDLS_BUNDLE</A></SPAN></P><P></P><P>Best regards</P><P>igor</P><P>-----------------------------------------------------------------------------------------------------------------------</P><P>Note: If this post answers your question, please click the Correct Answer button. Thank you!</P><P>-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Wed, 03 Jun 2015 01:56:03 GMT https://community.nxp.com/t5/i-MX-Processors/meta-fsl-arm-linux-rt-rcu-preempt-stack-errors-IMX-6D/m-p/413963#M62035 igorpadykov 2015-06-03T01:56:03Z Re: meta-fsl-arm/linux-rt rcu_preempt stack errors (IMX.6D) https://community.nxp.com/t5/i-MX-Processors/meta-fsl-arm-linux-rt-rcu-preempt-stack-errors-IMX-6D/m-p/413964#M62036 <HTML><HEAD></HEAD><BODY><P>Thanks Igor, I'll give the 3.10.17 patch a go.</P><P>I am obviously hesitant to move to the 3.14.28 kernel late in the product development that we are in, is there any obvious benefits/downsides to move to 3.14.28?</P></BODY></HTML> Wed, 03 Jun 2015 02:44:58 GMT https://community.nxp.com/t5/i-MX-Processors/meta-fsl-arm-linux-rt-rcu-preempt-stack-errors-IMX-6D/m-p/413964#M62036 phillogden 2015-06-03T02:44:58Z Re: meta-fsl-arm/linux-rt rcu_preempt stack errors (IMX.6D) https://community.nxp.com/t5/i-MX-Processors/meta-fsl-arm-linux-rt-rcu-preempt-stack-errors-IMX-6D/m-p/413965#M62037 <HTML><HEAD></HEAD><BODY><P>Hi Phill</P><P></P><P>it has much more gpu fixes as described in</P><P></P><P><A href="http://cache.freescale.com/files/32bit/doc/support_info/IMX6L31428101RN.pdf?fasp=1&WT_TYPE=Supporting%20Information&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation&fileExt=.pdf">IMX6L31428101RN</A>  i.MX 6 Yocto Project L3.14.28_1.0.1 Patch Release Notes -Release Notes</P><P></P><P>Best regards</P><P>igor</P></BODY></HTML> Wed, 03 Jun 2015 04:38:07 GMT https://community.nxp.com/t5/i-MX-Processors/meta-fsl-arm-linux-rt-rcu-preempt-stack-errors-IMX-6D/m-p/413965#M62037 igorpadykov 2015-06-03T04:38:07Z