[Bug 83420] New: [ILK]igt/gem_concurrent_blit some subcases fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83420

          Priority: medium
            Bug ID: 83420
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [ILK]igt/gem_concurrent_blit some subcases fail
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 105649
  --> https://bugs.freedesktop.org/attachment.cgi?id=105649&action=edit
dmesg

==System Environment==
--------------------------
Regression: No. 
They are new cases
And the failure was tracked by bug 83330 before.

Non-working platforms: ILK

==kernel==
--------------------------
origin/drm-intel-nightly: 2b1159961e4bc38a9090f8ec0ab6f16701dbdf81(fails)
     drm-intel-nightly: 2014y-09m-02d-22h-46m-37s integration manifest
origin/drm-intel-next-queued: d5f0b5cb412003274cde50b0583727d0c33bf6e4(fails)
    drm: Remove old defines for vswing and pre-emph values
origin/drm-intel-fixes: bbfb44e8b688e778964275ab0862f67463ba4f84(fails)
    drm/i915: Fix lock dropping in intel_tv_detect()

==Bug detailed description==
igt/gem_concurrent_blit some subcases fail

Case list:
igt/gem_concurrent_blit/cpu-rcs-overwrite-source-forked
igt/gem_concurrent_blit/gttX-rcs-overwrite-source-forked
igt/gem_concurrent_blit/prw-rcs-early-read-forked

Output:
[root at x-pk5 tests]# ./gem_concurrent_blit --run-subtest
cpu-rcs-overwrite-source-forked
IGT-Version: 1.7-gc12f292 (x86_64) (Linux:
3.17.0-rc2_drm-intel-nightly_2b1159_20140903+ x86_64)
using 2x512 buffers, each 1MiB
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
gem_concurrent_blit: igt_core.c:664: igt_skip: Assertion `!test_child' failed.
child 5 died with signal 6, Aborted
Subtest cpu-rcs-overwrite-source-forked: FAIL

==Reproduce steps==
---------------------------- 
1. ./gem_concurrent_blit --run-subtest cpu-rcs-overwrite-source-forked

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