sched: problem with paging request on linux 3.16

Hello,

I installed rtai-5.0-test2 on Debian Jessie with 32Bit kernel 3.16.7, using the hal-patch from magma (hal-linux-3.16.7-x86-5x.patch<https://github.com/ShabbyX/RTAI/blob/master/base/arch/x86/patches/hal-linux-3.16.7-x86-5x.patch>).

Everything works fine on a board with Intel i3-4130 CPU.
On a system with Intel i3-6110 CPU I get an error when I insert rtai_sched.ko.

This is the kernel log when I start testsuite/kernel/latency:

I-pipe: head domain RTAI registered.
RTAI[hal]: mounted. ISOL_CPUS_MASK: 0.
SYSINFO - # CPUs: 1, TIMER NAME: 'lapic', TIMER IRQ: 2305, TIMER FREQ: 99758000, CLOCK NAME: 'tsc', CLOCK FREQ: 3192285000, CPU FREQ: 3192285000, LINUX TIMER IRQ: 2305.
RTAI[malloc]: global heap size = 2097152 bytes, <BSD>.
, kstacks pool size = 524288 bytes.
RTAI[sched]: hard timer type/freq = lapic/99758000(Hz); timing: oneshot; linear timed lists.
RTAI[sched]: Linux timer freq = 250 (Hz), TimeBase freq = 3192285000 hz.
RTAI[sched]: timer setup = 64 ns, resched latency = 0 ns.
RTAI[usi]: enabled.
BUG: unable to handle kernel paging request at bfebea1c
IP: [<f86e2845>] rtai_lxrt_invoke+0xae5/0x13c0 [rtai_sched]
*pde = 108de067 *pte = 10c15067
Oops: 0001 [#1] PREEMPT
Modules linked in: rtai_sched(O+) rtai_hal(O) i915 drm_kms_helper drm i2c_algo_bit cfg80211 rfkill nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc snd_hda_codec_hdmi coretemp snd_hda_codec_realtek snd_hda_codec_generic kvm snd_hda_intel snd_hda_controller snd_hda_codec crc32_pclmul snd_hwdep aesni_intel snd_pcsp aes_i586 xts snd_pcm snd_timer lrw gf128mul snd soundcore ablk_helper cryptd mxm_wmi battery evdev serio_raw tpm_tis tpm shpchp wmi video button fuse parport_pc ppdev lp parport autofs4 ext4 crc16 mbcache jbd2 hid_generic usbhid sg sd_mod crc_t10dif crct10dif_generic crct10dif_common crc32c_intel ahci libahci xhci_hcd r8169 8139cp mii libata scsi_mod usbcore usb_common fan thermal_sys i2c_hid hid i2c_core
CPU: 0 PID: 1346 Comm: calibrate Tainted: G           O  3.16-rtai #8
Hardware name: System manufacturer System Product Name/H110M-C, BIOS 3402 04/06/2017
task: d08dc010 ti: d08f8000 task.ti: d08f8000
EIP: 0060:[<f86e2845>] EFLAGS: 00010206 CPU: 0
EIP is at rtai_lxrt_invoke+0xae5/0x13c0 [rtai_sched]
EAX: 0040780c EBX: 00000000 ECX: 00000407 EDX: bfebea1c
ESI: bfebea1c EDI: 0040780c EBP: d08f9f84 ESP: d08f9f34
 DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
CR0: 8005003b CR2: bfebea1c CR3: 108dd000 CR4: 00340790
I-pipe domain Linux
Stack:
d08f9f58 c10863ee c15e4180 c1087745 d08f9f98 c15e4240 d08f9f98 00000001
fffffffe d08f9f64 c108789c 00000000 d08f9fac c1145b90 d08f9f98 ed94bc40
e19b3ac0 d08f9fb4 bfebe978 b74f6848 d08f9fa4 f86e09dd 00000000 bfebff48
Call Trace:
[<c10863ee>] ? rcu_is_watching+0x1e/0x40
[<c1087745>] ? __call_rcu.constprop.60+0xa5/0x1e0
[<c108789c>] ? call_rcu+0x1c/0x20
[<c1145b90>] ? SyS_access+0x190/0x1f0
[<f86e09dd>] ? lxrt_intercept_syscall+0x8d/0x190 [rtai_sched]
[<c10bdcd4>] ? __ipipe_notify_syscall+0x14/0x30
[<c1468115>] ? pipeline_sysenter+0x7/0x1e
Code: 10 8b 56 0c 89 54 24 0c 8b 56 08 89 54 24 08 8b 56 04 89 54 24 04 8b 16 89 14 24 ff 50 04 89 44 24 2c 89 54 24 30 e9 37 f6 ff ff <8b> 1a 8d 81 18 fc ff ff 83 f8 20 89 da 0f 87 97 05 00 00 ff 24
EIP: [<f86e2845>] rtai_lxrt_invoke+0xae5/0x13c0 [rtai_sched] SS:ESP 0068:d08f9f34
CR2: 00000000bfebea1c
---[ end trace 426b8ee3f3f6e396 ]---
USERMODE CHECK: ERROR.
USERMODE CHECK PROVIDED (ns): KernelLatency 0, UserLatency 0.
FINAL CALIBRATION SUMMARY (ns): KernelLatency 1, UserLatency 1.


Has anybody an idea what causes this ops and how I can avoid it?

Best regards,
Josef

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