[Bug 79670] New: [BYT Regression]igt/gem_exec_big fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79670

          Priority: high
            Bug ID: 79670
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BYT Regression]igt/gem_exec_big 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 100445
  --> https://bugs.freedesktop.org/attachment.cgi?id=100445&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes. 
Good commit on -next-queued: 192155025197cc4765702a180904c3b62c152b7a

Non-working platforms: BYT

==kernel==
--------------------------
origin/drm-intel-nightly: 0a37b5d366831590ebc976018d1bd812ef526a98(fails)
    drm-intel-nightly: 2014y-06m-03d-19h-31m-28s integration manifest
origin/drm-intel-next-queued: 92d7377929140bc120f7742ee3afffcb2a827fe4(fails)
     drm/i915: Simplify intel_gpu_reset
origin/drm-intel-fixes: d23db88c3ab233daed18709e3a24d6c95344117f(fails)
    drm/i915: Prevent negative relocation deltas from wrapping

==Bug detailed description==
-----------------------------
igt/gem_exec_big fails

Output:
./gem_exec_big
IGT-Version: 1.6-g1451df1 (x86_64) (Linux:
3.15.0-rc3_drm-intel-next-queued_06946f_20140605+ x86_64)
Test assertion failure function exec, file gem_exec_big.c:95:
Last errno: 0, Success
Failed assertion: tmp == gem_reloc[0].presumed_offset

==Reproduce steps==
---------------------------- 
1. ./gem_exec_big

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