[Bug 88094] New: [BDW]igt/gem_reset_stats/ban-bsd sporadically fails and causes *ERROR* gpu hanging too fast, banning!

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88094

            Bug ID: 88094
           Summary: [BDW]igt/gem_reset_stats/ban-bsd sporadically fails
                    and causes *ERROR* gpu hanging too fast, banning!
           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 111828
  --> https://bugs.freedesktop.org/attachment.cgi?id=111828&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure

Non-working platforms: BDW

==kernel==
--------------------------
drm-intel-nightly/07d0c831d9207c937595f081c8fddbddbf53756f
commit 07d0c831d9207c937595f081c8fddbddbf53756f
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Tue Dec 30 15:02:01 2014 +0200

    drm-intel-nightly: 2014y-12m-30d-13h-01m-34s UTC integration manifest

==Bug detailed description==
-----------------------------
It sporadically fails and causes *ERROR* gpu hanging too fast, banning! on BDW
with -nightly kernel. fail rate:1/15

output:
IGT-Version: 1.9-gcb512b6 (x86_64) (Linux:
3.19.0-rc2_drm-intel-nightly_07d0c8_20150105+ x86_64)
retrying for ban (9)
Test assertion failure function inject_hang_ring, file gem_reset_stats.c:332:
Failed assertion: gem_exec(fd, &execbuf) == 0
Last errno: 5, Input/output error

==Reproduce steps==
---------------------------- 
1. ./gem_reset_stats --run-subtest ban-bsd

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