[Bug 90413] New: [i965]igt/gem_mmap_gtt/medium-copy takes more than 10 minutes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90413

            Bug ID: 90413
           Summary: [i965]igt/gem_mmap_gtt/medium-copy takes more than 10
                    minutes
           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 115711
  --> https://bugs.freedesktop.org/attachment.cgi?id=115711&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure, new case

Non-working platforms: i965

==kernel==
--------------------------
drm-intel-nightly/7dcedb8e7bbf49f1342df21851d9b36786ff67ce
commit 7dcedb8e7bbf49f1342df21851d9b36786ff67ce
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Mon May 11 18:51:58 2015 +0200

    drm-intel-nightly: 2015y-05m-11d-16h-51m-26s UTC integration manifest

==Bug detailed description==
-----------------------------
It takes more than 10 minutes.gem_mmap_gtt at medium-copy-xy also has this issue.

output:
IGT-Version: 1.10-g9b0a32d (x86_64) (Linux:
4.1.0-rc3_drm-intel-nightly_7dcedb_20150512+ x86_64)
^C
real    14m19.279s
user    0m0.043s
sys     14m19.968s

==Reproduce steps==
---------------------------- 
1. time ./gem_mmap_gtt --run-subtest medium-copy

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