[Bug 72984] New: [IVB/HSW Regression]igt/gem_pipe_control_store_loop/reused-buffer fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72984

          Priority: high
            Bug ID: 72984
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [IVB/HSW
                    Regression]igt/gem_pipe_control_store_loop/reused-buff
                    er fails
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 91147
  --> https://bugs.freedesktop.org/attachment.cgi?id=91147&action=edit
dmesg

System Environment:
--------------------------
Platform:  Ivybridge/Haswell
Kernel: (drm-intel-nightly)e9c4f42a6d0cf76b90b88954e2463bf1335faf6e

Bug detailed description:
-----------------------------
It fails on Ivybridge and Haswell with ppgtt branch and nightly branch.

The latest known good commit:f7698ba75fa283435f5077b9dfb4319d28b9de9a
The latest known bad commit:a7c1d426ef335ccfb6bd567a3f616fa232418fa2

output:
IGT-Version: 1.5-g4f28614 (x86_64) (Linux: 3.13.0-rc3_ppgtt_a7c1d4_20131222+
x86_64)
Test assertion failure function store_pipe_control_loop, file
gem_pipe_control_store_loop.c:97:
Last errno: 2, No such file or directory
Failed assertion: target_bo->offset != 0
Subtest reused-buffer: FAIL

Reproduce steps:
----------------------------
1. ./gem_pipe_control_store_loop --run-subtest reused-buffer

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