[Bug 71564] New: [IVB Regression]igt/gem_storedw_batches_loop/normal causes [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... blitter ring idle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71564

          Priority: high
            Bug ID: 71564
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [IVB Regression]igt/gem_storedw_batches_loop/normal
                    causes [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck
                    timer elapsed... blitter 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 89125
  --> https://bugs.freedesktop.org/attachment.cgi?id=89125&action=edit
dmesg

System Environment:
--------------------------
Platform: Ivybridge
Kernel:    (drm-intel-nightly)8e88bd3a304ff70d23c0586be7531e24a56f3931

Bug detailed description:
-------------------------
Run ./gem_storedw_batches_loop --run-subtest normal, It causes <3>[  
28.713648] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed...
blitter ring idle.
It happens on ivybridge with -nightly kernel and -queued kernel.
It works well on -fixes kernel and debug kernel.

The latest known good commit:da66146425c3136943452988afd3d64cd551da58
The latest known bad commit: a94b013b91de055572183c6772865123fa955027

output:
running storedw loop with stall every 1 batch
completed 524288 writes successfully
running storedw loop with stall every 2 batch
completed 524288 writes successfully
running storedw loop with stall every 3 batch
completed 524288 writes successfully
running storedw loop with stall every 5 batch
completed 524288 writes successfully
Subtest normal: SUCCESS

Reproduce steps:
-------------------------
1. ./gem_storedw_batches_loop --run-subtest normal

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