[Bug 67198] [HSW]igt/gem_seqno_wrap randomly fail and cause system hang with call trace

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67198

Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
           Assignee|intel-gfx-bugs at lists.freede |ben at bwidawsk.net
                   |sktop.org                   |

--- Comment #2 from Daniel Vetter <daniel at ffwll.ch> ---
Can you please decode the exact line where the BUG happened?

When looking at the backtrace the important part is

[   59.706535] RIP: 0010:[<ffffffffa00733f5>]  [<ffffffffa00733f5>]
i915_gem_reset+0x11a/0x24c [i915]

The address can be decoded to line numbers with

addr2line -e drivers/gpu/drm/i915/i915.ko i915_gem_reset+0x11a

It is of utmost importance that the hex offset you pass to addr2line from the
backtrace is from running the exact i915.ko you pass it. Otherwise the line
number will be unusable (and often is really misleading).

Otherwise it seems to die in

static inline unsigned long
i915_gem_obj_ggtt_offset(struct drm_i915_gem_object *o)
{
    BUG_ON(list_empty(&o->vma_list));
    return __i915_gem_obj_to_vma(o)->node.start;
}

so one for Ben.

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