[Bug 83336] New: [BDW Regression]igt/gem_ring_sync_copy some subcases fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83336

          Priority: high
            Bug ID: 83336
          Keywords: bisect_pending
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW Regression]igt/gem_ring_sync_copy 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 105535
  --> https://bugs.freedesktop.org/attachment.cgi?id=105535&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes. 
They are i-g-t regression issues
Good commit: 2ef19ad79a07d862a2dc799ab2e71d2ad91c9065
Bad commit: c12f292b1d8bbc61b65f1dfc3fd4a9e1e286dbee

Non-working platforms: BDW

==kernel==
--------------------------
origin/drm-intel-nightly: 6e9c5b9d428bb075293ec865ba58f90931187a48(fails)
    drm-intel-nightly: 2014y-08m-29d-21h-34m-26s integration manifest
origin/drm-intel-next-queued: c101c5b635bee54e43d0732473d2f80b2a0e00f4(fails)
    drm/i915: make fbdev initialization asynchronous v2
origin/drm-intel-fixes: bbe1c2740d3a25aa1dbe5d842d2ff09cddcdde0a(fails)
    drm/i915: Remove bogus __init annotation from DMI callbacks

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

Case list:
igt/gem_ring_sync_copy/sync-blitter-render-write-read
igt/gem_ring_sync_copy/sync-blitter-render-write-write
igt/gem_ring_sync_copy/sync-render-blitter-read-write
igt/gem_ring_sync_copy/sync-render-blitter-write-read


Output:
root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests#
./gem_ring_sync_copy --run-subtest sync-blitter-render-write-read
IGT-Version: 1.7-gd6af004 (x86_64) (Linux:
3.17.0-rc2_drm-intel-nightly_6e9c5b_20140901+ x86_64)
Test assertion failure function bo_check, file gem_ring_sync_copy.c:129:
Failed assertion: data->linear[i] == val
error: 0xc != 0xa
Subtest sync-blitter-render-write-read: FAIL


==Reproduce steps==
---------------------------- 
1. ./gem_ring_sync_copy --run-subtest sync-blitter-render-write-read

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