[Bug 90160] New: [BDW]igt/gem_concurrent_blit sporadically doesn't exit testing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90160

            Bug ID: 90160
           Summary: [BDW]igt/gem_concurrent_blit sporadically doesn't exit
                    testing
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 115301
  --> https://bugs.freedesktop.org/attachment.cgi?id=115301&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure, fail rate:2/60

Non-working platforms: BDW

==kernel==
--------------------------
drm-intel-nightly/92bb36c80e561f82b1f4b63cc269a71833137841
commit 92bb36c80e561f82b1f4b63cc269a71833137841
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Fri Apr 24 00:26:53 2015 +0300

    drm-intel-nightly: 2015y-04m-23d-21h-26m-24s UTC integration manifest

==Bug detailed description==
-----------------------------
It sporadically doesn't exit testing. Run more than 10 minutes, ctrl + c, it
also doesn't exit.

output:
IGT-Version: 1.10-gbeddb3b (x86_64) (Linux:
4.0.0_drm-intel-nightly_92bb36_20150424+ x86_64)
using 2x512 buffers, each 1MiB
^C^C^C^C^C^C^C^C^C^C

==Reproduce steps==
---------------------------- 
1. time ./gem_concurrent_blit --run-subtest gtt-blt-read-read-rcs-forked

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