[Bug 100651] New: [BAT][BSW] CI run hit a scheduler warning (rq->clock_update_flags < RQCF_ACT_SKIP)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100651

            Bug ID: 100651
           Summary: [BAT][BSW] CI run hit a scheduler warning
                    (rq->clock_update_flags < RQCF_ACT_SKIP)
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: martin.peres at free.fr
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Here is the warning in question:

[  568.160295] ------------[ cut here ]------------
[  568.160327] WARNING: CPU: 1 PID: 0 at kernel/sched/sched.h:833
pick_next_task_rt+0x250/0x260
[  568.160335] rq->clock_update_flags < RQCF_ACT_SKIP
[  568.160343] Modules linked in: vgem snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel r8169 mii lpc_ich i2c_hid i915 snd_hda_intel snd_hda_codec
snd_hwdep snd_hda_core snd_pcm prime_numbers i2c_designware_platform
i2c_designware_core
[  568.160529] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G     U  W      
4.11.0-rc6-CI-CI_DRM_2509+ #1
[  568.160540] Hardware name:                  /NUC5CPYB, BIOS
PYBSWCEL.86A.0058.2016.1102.1842 11/02/2016
[  568.160548] Call Trace:
[  568.160571]  dump_stack+0x67/0x92
[  568.160591]  __warn+0xc6/0xe0
[  568.160611]  warn_slowpath_fmt+0x46/0x50
[  568.160637]  pick_next_task_rt+0x250/0x260
[  568.160658]  __schedule+0x160/0xbc0
[  568.160673]  ? ktime_get+0x89/0x120
[  568.160696]  schedule+0x3b/0x90
[  568.160712]  schedule_preempt_disabled+0x13/0x20
[  568.160726]  do_idle+0x145/0x1f0
[  568.160745]  cpu_startup_entry+0x18/0x20
[  568.160760]  start_secondary+0x102/0x120
[  568.160778]  start_cpu+0x14/0x14
[  568.160810] ---[ end trace eb40e71579767b8a ]---

Full logs:
https://intel-gfx-ci.01.org/CI/CI_DRM_2509/fi-bsw-n3050/igt@kms_pipe_crc_basic@suspend-read-crc-pipe-c.html

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