[Bug 78681] New: [ILK]igt/gem_ring_sync_copy randomly causes *ERROR* Hangcheck timer elapsed... bsd ring idle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78681

          Priority: high
            Bug ID: 78681
                CC: intel-gfx-bugs at lists.freedesktop.org,
                    jinxianx.guo at intel.com
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [ILK]igt/gem_ring_sync_copy randomly causes *ERROR*
                    Hangcheck timer elapsed... bsd ring idle
        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 99006
  --> https://bugs.freedesktop.org/attachment.cgi?id=99006&action=edit
dmesg

System Environment:
--------------------------
Platform:         Ironlake
Kernel:           (drm-intel-nightly)2be456541ea41728002ccca2de5235f48d14326e

Bug detailed description:
-------------------------
It randomly causes [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer
elapsed... bsd ring idle on Ironlake with -nightly and -queued kernel.It
happens 1 in 10 runs. Run 20 cycles on -fixes kernel,it works well.

output:
IGT-Version: 1.6-g351e7d3 (x86_64) (Linux:
3.15.0-rc3_drm-intel-nightly_2be456_20140514+ x86_64)
Test requirement not met in function __real_main319, file
gem_ring_sync_copy.c:342:
Last errno: 0, Success
Test requirement: (!(data.render.copy))
no render-copy function
Subtest sync-render-blitter-write-read: SKIP
Subtest sync-render-blitter-read-write: SKIP
Subtest sync-render-blitter-write-write: SKIP
Subtest sync-blitter-render-write-read: SKIP
Subtest sync-blitter-render-read-write: SKIP
Subtest sync-blitter-render-write-write: SKIP

Reproduce steps:
----------------
1. ./gem_ring_sync_copy

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