Re: general protection fault on RTAI 4.0

More info....this only shows up on the i5-3470 CPU.
I've tested it with some i3 processors and other quad core i5-4590's and 
some older E7500 core 2 duo's. All those work fine, but the rtai 
testsuite crashes on the i5-3470 within the first two iterations of output.

JB


On 3/18/2016 11:57, JB wrote:
> Hello again :)
>
> The reason I was attempting to get RTAI 5.0 test1 working is because I 
> ran into a problem using RTAI 4.0 on one particular CPU/motherboard 
> and I'm having a really hard time figuring out what the problem is. 
> Here is what I'm seeing with RTAI 4.0 on a 3.8.13 kernel which I've 
> been successfully using on other systems for months. I attached my 
> kernel config and rtai config.  Here is what I get when I try to run 
> the latency test:
>
> Mar 18 03:55:45 localhost kernel: [   91.508079]
> Mar 18 03:55:45 localhost kernel: [   91.508079] LXRT CHANGED MODE 
> (TRAP), PID = 1021, VEC = 13, SIGNO = 11.
> Mar 18 03:55:45 localhost kernel: [   91.508101] general protection 
> fault: 0000 [#1] PREEMPT SMP
> Mar 18 03:55:45 localhost kernel: [   91.508157] Modules linked in: 
> rtai_msg(OF) rtai_mbx(OF) rtai_sem(OF) rtai_sched(OF) rtai_malloc(POF) 
> rtai_hal(OF) snd_hda_codec_realtek snd_hda_intel snd_hda_codec 
> snd_hwdep snd_seq snd_seq_device snd_pcm e1000e iTCO_wdt 
> iTCO_vendor_support snd_page_alloc snd_timer snd mei tpm_tis tpm 
> coretemp crc32c_intel ghash_clmulni_intel microcode nfsd tpm_bios 
> pcspkr i2c_i801 lpc_ich shpchp mfd_core soundcore auth_rpcgss nfs_acl 
> lockd sunrpc i915 i2c_algo_bit drm_kms_helper drm video
> Mar 18 03:55:45 localhost kernel: [   91.508339] CPU 0
> Mar 18 03:55:45 localhost kernel: [   91.508348] Pid: 1021, comm: 
> latency Tainted: PF          O 3.8.13-ds #6 /DQ77MK
> Mar 18 03:55:45 localhost kernel: [   91.508374] RIP: 
> 0010:[<ffffffff8102b43b>]  [<ffffffff8102b43b>] 
> native_apic_msr_write+0x2b/0x30
> Mar 18 03:55:45 localhost kernel: [   91.508404] RSP: 
> 0018:ffff88006aeabde8  EFLAGS: 00010246
> Mar 18 03:55:45 localhost kernel: [   91.508420] RAX: 0000000002000000 
> RBX: 0000000000000001 RCX: 0000000000000831
> Mar 18 03:55:45 localhost kernel: [   91.508440] RDX: 0000000000000000 
> RSI: 0000000002000000 RDI: 0000000000000031
> Mar 18 03:55:45 localhost kernel: [   91.508460] RBP: ffff88006aeabde8 
> R08: 0000000000000001 R09: 0000000000000045
> Mar 18 03:55:45 localhost kernel: [   91.508481] R10: ffffffffa02b8d90 
> R11: 0000000000003246 R12: 0000000000000201
> Mar 18 03:55:45 localhost kernel: [   91.508501] R13: 0000000000051820 
> R14: ffffffffa02c4450 R15: fffffffffffffa1e
> Mar 18 03:55:45 localhost kernel: [   91.508522] FS: 
> 00007f5613b34740(0000) GS:ffff880100200000(0000) knlGS:0000000000000000
> Mar 18 03:55:45 localhost kernel: [   91.508545] CS:  0010 DS: 0000 
> ES: 0000 CR0: 0000000080050033
> Mar 18 03:55:45 localhost kernel: [   91.508562] CR2: 000000000042fad0 
> CR3: 000000006ae66000 CR4: 00000000001407f0
> Mar 18 03:55:45 localhost kernel: [   91.508582] DR0: 0000000000000000 
> DR1: 0000000000000000 DR2: 0000000000000000
> Mar 18 03:55:45 localhost kernel: [   91.508603] DR3: 0000000000000000 
> DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Mar 18 03:55:45 localhost kernel: [   91.508623] I-pipe domain Linux
> Mar 18 03:55:45 localhost kernel: [   91.508633] Process latency (pid: 
> 1021, threadinfo ffff88006aea8000, task ffff88006b3d9770)
> Mar 18 03:55:45 localhost kernel: [   91.508657] Stack:
> Mar 18 03:55:45 localhost kernel: [   91.508664]  ffff88006aeabe18 
> ffffffffa02c3876 00007fff3e178bc0 0000000000051820
> Mar 18 03:55:45 localhost kernel: [   91.508690]  ffffc900046a1230 
> 00007fff3e178bc0 ffff88006aeabe58 ffffffffa02c45a1
> Mar 18 03:55:45 localhost kernel: [   91.508716]  00007fff3e178b90 
> 00007fff3e178bb8 0000000000000200 000000000000004b
> Mar 18 03:55:45 localhost kernel: [   91.508742] Call Trace:
> Mar 18 03:55:45 localhost kernel: [   91.508754] [<ffffffffa02c3876>] 
> mbx_signal.isra.4+0x1f6/0x290 [rtai_mbx]
> Mar 18 03:55:45 localhost kernel: [   91.508775] [<ffffffffa02c45a1>] 
> _rt_mbx_send_if+0x151/0x1f0 [rtai_mbx]
> Mar 18 03:55:45 localhost kernel: [   91.508798] [<ffffffffa02ad6a8>] 
> rtai_lxrt_invoke+0x108/0x1160 [rtai_sched]
> Mar 18 03:55:45 localhost kernel: [   91.508821] [<ffffffffa02acb95>] 
> lxrt_intercept_syscall+0x95/0x130 [rtai_sched]
> Mar 18 03:55:45 localhost kernel: [   91.508844] [<ffffffff810e01d8>] 
> __ipipe_notify_kevent+0x18/0x20
> Mar 18 03:55:45 localhost kernel: [   91.508863] [<ffffffff8102585a>] 
> __ipipe_syscall_root+0x3a/0xe0
> Mar 18 03:55:45 localhost kernel: [   91.508883] [<ffffffff812deada>] 
> __ipipe_syscall_root_thunk+0x35/0x67
> Mar 18 03:55:45 localhost kernel: [   91.508904] [<ffffffff815c7327>] 
> ? system_call_after_swapgs+0x54/0x6d
> Mar 18 03:55:45 localhost kernel: [   91.508923] Code: 55 81 ff e0 00 
> 00 00 48 89 e5 74 21 89 f8 83 e0 ef 83 f8 20 74 17 81 ff d0 00 00 00 
> 74 0f c1 ef 04 31 d2 89 f0 8d 8f 00 08 00 00 <0f> 30 5d c3 90 55 81 ff 
> e0 00 00 00 b8 ff ff ff ff 48 89 e5 74
> Mar 18 03:55:45 localhost kernel: [   91.509073] RIP 
> [<ffffffff8102b43b>] native_apic_msr_write+0x2b/0x30
> Mar 18 03:55:45 localhost kernel: [   91.509094]  RSP <ffff88006aeabde8>
> Mar 18 03:55:45 localhost kernel: [   91.530153] ---[ end trace 
> 4ad3f2f6dc4cb6a7 ]---
> Mar 18 03:55:45 localhost kernel:
> LXRT CHANGED MODE (TRAP), PID = 1021, VEC = 13, SIGNO = 11.
> Mar 18 03:55:45 localhost kernel: [   91.531685] LXRT releases PID 
> 1021 (ID: latency).
> Mar 18 03:55:45 localhost kernel: general protection fault: 0000 [#1] 
> PREEMPT SMP
> Mar 18 03:55:45 localhost kernel: Modules linked in: rtai_msg(OF) 
> rtai_mbx(OF) rtai_sem(OF) rtai_sched(OF) rtai_malloc(POF) rtai_hal(OF) 
> snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq 
> snd_seq_device snd_pcm e1000e iTCO_wdt iTCO_vendor_support 
> snd_page_alloc snd_timer snd mei tpm_tis tpm coretemp crc32c_intel 
> ghash_clmulni_intel microcode nfsd tpm_bios pcspkr i2c_i801 lpc_ich 
> shpchp mfd_core soundcore auth_rpcgss nfs_acl lockd sunrpc i915 
> i2c_algo_bit drm_kms_helper drm video
>
> ================================================================================ 
>
>
>
> Some of the CPUs we use are 4 cores but have 2 disabled so we can 
> maintain backward compatibility and this is from /proc/cpuinfo:
>
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 58
> model name      : Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz
> stepping        : 9
> microcode       : 0x1b
> cpu MHz         : 3192.803
> cache size      : 6144 KB
> physical id     : 0
> siblings        : 2
> core id         : 0
> cpu cores       : 2
> apicid          : 0
> initial apicid  : 0
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 13
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
> mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe 
> syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl 
> xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl 
> vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt 
> tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm arat epb xsaveopt 
> pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms
> bogomips        : 6385.60
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 36 bits physical, 48 bits virtual
> power management:
>
> processor       : 1
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 58
> model name      : Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz
> stepping        : 9
> microcode       : 0x1b
> cpu MHz         : 3192.803
> cache size      : 6144 KB
> physical id     : 0
> siblings        : 2
> core id         : 1
> cpu cores       : 2
> apicid          : 2
> initial apicid  : 2
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 13
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
> mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe 
> syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl 
> xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl 
> vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt 
> tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm arat epb xsaveopt 
> pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms
> bogomips        : 6385.60
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 36 bits physical, 48 bits virtual
> power management:
> ======================================================================================= 
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