[Bug 81369] New: [drm] stuck on render ring with Linux 3.15.5, works with 3.14.11

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81369

          Priority: medium
            Bug ID: 81369
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [drm] stuck on render ring with Linux 3.15.5, works
                    with 3.14.11
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: freedesktop.flibble at mandarb.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 102812
  --> https://bugs.freedesktop.org/attachment.cgi?id=102812&action=edit
Crash dump

Jul 14 21:04:59 balrog kernel: [  293.552750] [drm] stuck on render ring
Jul 14 21:04:59 balrog kernel: [  293.553208] [drm] GPU HANG: ecode
0:0x85fffff8, in Xorg [14516], reason: Ring hung, action: reset
Jul 14 21:04:59 balrog kernel: [  293.553210] [drm] GPU hangs can indicate a
bug anywhere in the entire gfx stack, including userspace.
Jul 14 21:04:59 balrog kernel: [  293.553211] [drm] Please file a _new_ bug
report on bugs.freedesktop.org against DRI -> DRM/Intel
Jul 14 21:04:59 balrog kernel: [  293.553212] [drm] drm/i915 developers can
then reassign to the right component if it's not a kernel issue.
Jul 14 21:04:59 balrog kernel: [  293.553213] [drm] The gpu crash dump is
required to analyze gpu hangs, so please always attach it.
Jul 14 21:04:59 balrog kernel: [  293.553214] [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Jul 14 21:05:01 balrog kernel: [  295.551577] [drm] Enabling RC6 states: RC6
on, RC6p off, RC6pp off
Jul 14 21:05:05 balrog kernel: [  299.553243] [drm] stuck on blitter ring
Jul 14 21:05:05 balrog kernel: [  299.553717] [drm] GPU HANG: ecode
2:0xfffffffe, in Xorg [14516], reason: Ring hung, action: reset
Jul 14 21:05:05 balrog kernel: [  299.553760] [drm:i915_context_is_banned]
*ERROR* gpu hanging too fast, banning!
Jul 14 21:05:07 balrog kernel: [  301.552531] [drm] Enabling RC6 states: RC6
on, RC6p off, RC6pp off


To me, this looks pretty similar to bug Bug 78533, except the two patches do
not apply cleanly to my 3.15.5 kernel:
1 > cat ../patches/Prevent\ negative\ relocation\ deltas\ from\ causing\
wraparound.patch | patch -l -s -p1 --dry-run                                    
3 out of 4 hunks FAILED

1 > cat ../patches/Offsect\ batch\ buffers\ to\ prevent\ delta\ wrapping.patch
| patch -l -s -p1 --dry-run                                                     
2 out of 2 hunks FAILED
Reversed (or previously applied) patch detected!  Assume -R? [n] 
Apply anyway? [n] 
5 out of 5 hunks ignored
Reversed (or previously applied) patch detected!  Assume -R? [n] 
Apply anyway? [n] 
2 out of 2 hunks ignored
5 out of 6 hunks FAILED
Reversed (or previously applied) patch detected!  Assume -R? [n] 
Apply anyway? [n] 
1 out of 1 hunk ignored

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