few KMS tests - dmesg-fail - Overflow of CRC buffer, userspace reads too slow

http://gfx-ci.igk.intel.com/cibuglog-ng/testresult/1586259443?query_key=832a420baefe9fe17d74f6ce9fccdb5a1dcb7206

<7> [314.097909] i915 0000:00:02.0: [drm:drm_mode_rmfb_work_fn] Removing [FB:121] from all active usage due to RMFB ioctl
<7> [314.098642] i915 0000:00:02.0: [drm:drm_mode_addfb2] [FB:120]
<7> [314.214098] i915 0000:00:02.0: [drm:drm_mode_rmfb_work_fn] Removing [FB:119] from all active usage due to RMFB ioctl
<7> [314.316910] i915 0000:00:02.0: [drm:drm_mode_addfb2] [FB:113]
<7> [314.650036] i915 0000:00:02.0: [drm:vlv_compute_pipe_wm [i915]] primary C watermarks: PM2=60, PM5=60, DDR DVFS=0
<7> [314.653068] i915 0000:00:02.0: [drm:_intel_set_memory_cxsr [i915]] memory self-refresh is disabled (was disabled)
<7> [314.681161] i915 0000:00:02.0: [drm:drm_mode_rmfb_work_fn] Removing [FB:120] from all active usage due to RMFB ioctl
<7> [314.750064] i915 0000:00:02.0: [drm:drm_mode_addfb2] [FB:119]
<7> [314.817483] i915 0000:00:02.0: [drm:vlv_compute_pipe_wm [i915]] primary C watermarks: PM2=120, PM5=120, DDR DVFS=0
<7> [314.820518] i915 0000:00:02.0: [drm:_intel_set_memory_cxsr [i915]] memory self-refresh is disabled (was disabled)
<7> [314.847739] i915 0000:00:02.0: [drm:drm_mode_rmfb_work_fn] Removing [FB:113] from all active usage due to RMFB ioctl
<7> [314.881434] i915 0000:00:02.0: [drm:drm_mode_addfb2] [FB:113]
<7> [315.000146] i915 0000:00:02.0: [drm:vlv_compute_pipe_wm [i915]] primary C watermarks: PM2=240, PM5=240, DDR DVFS=0
<7> [315.001797] i915 0000:00:02.0: [drm:_intel_set_memory_cxsr [i915]] memory self-refresh is disabled (was disabled)
<7> [315.048636] i915 0000:00:02.0: [drm:drm_mode_addfb2] [FB:119]
<3> [319.312779] [drm:drm_crtc_add_crc_entry] *ERROR* Overflow of CRC buffer, userspace reads too slow.
<6> [323.569432] [IGT] kms_plane: finished subtest pipe-C-planes, FAIL
<6> [323.570762] [IGT] kms_plane: finished subtest pixel-format, FAIL
<7> [323.571241] i915 0000:00:02.0: [drm:drm_mode_rmfb_work_fn] Removing [FB:113] from all active usage due to RMFB ioctl
<7> [323.571449] i915 0000:00:02.0: [drm:atomic_remove_fb] Disabling [PLANE:73:primary C] because [FB:113] is removed
<7> [323.571534] i915 0000:00:02.0: [drm:vlv_compute_pipe_wm [i915]] primary C watermarks: PM2=0, PM5=0, DDR DVFS=0
<7> [323.572457] i915 0000:00:02.0: [drm:_intel_set_memory_cxsr [i915]] memory self-refresh is disabled (was disabled)
<6> [323.743130] [IGT] kms_plane: exiting, ret=98
<7> [323.745182] i915 0000:00:02.0: [drm:i915_drop_caches_set [i915]] Dropping caches: 0x000001dc [0x000001dc]
<7> [323.747075] i915 0000:00:02.0: [drm:vlv_compute_pipe_wm [i915]] primary C watermarks: PM2=240, PM5=240, DDR DVFS=0
<7> [323.748244] i915 0000:00:02.0: [drm:_intel_set_memory_cxsr [i915]] memory self-refresh is disabled (was disabled)
<6> [323.815692] Console: switching to colour frame buffer device 480x135