[Bug 81326] New: [BDW Regression]igt/gem_reloc_vs_gpu/forked-faulting-reloc fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81326

          Priority: high
            Bug ID: 81326
          Keywords: bisect_pending
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW
                    Regression]igt/gem_reloc_vs_gpu/forked-faulting-reloc
                    fails
        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 102741
  --> https://bugs.freedesktop.org/attachment.cgi?id=102741&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes

Good commit on -next-queued: 84a2ab8ec76b4fa47f490a01c8186e4b4d757bfe
Non-working platforms: BDW

==kernel==
--------------------------
origin/drm-intel-nightly: 271bff129a641b5b35d99c9eb0ceb866ca42f692(fails)
    drm-intel-nightly: 2014y-07m-12d-12h-07m-51s integration manifest
origin/drm-intel-next-queued: 491a3448622059b087d8c465b46b11f2953df7c1(fails)
    drm/i915: Enable PSR by default.
origin/drm-intel-fixes: ceb9f032dc858c349d7d213454c5ba2c6ef9c5e5(works)
    Revert "drm/i915: Don't set the 8to6 dither flag when not scaling"

==Bug detailed description==
igt/gem_reloc_vs_gpu/forked-faulting-reloc fails

Output:
[root at x-bdw01 tests]# ./gem_reloc_vs_gpu --run-subtest forked-faulting-reloc
IGT-Version: 1.7-ge74dd22 (x86_64) (Linux:
3.16.0-rc4_drm-intel-nightly_271bff_20140714+ x86_64)
Test assertion failure function do_test, file gem_reloc_vs_gpu.c:260:
Failed assertion: test == 0xdeadbeef
mismatch in buffer 7: 0x00000000 instead of 0xdeadbeef
child 4 failed with exit status 99
Subtest forked-faulting-reloc: FAIL

==Reproduce steps==
---------------------------- 
1. ./gem_reloc_vs_gpu --run-subtest forked-faulting-reloc

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