[Bug 102888] [BAT][ILK] igt at gem_ringfill@basic-default-hang - fail assert - __gem_execbuf(fd, execbuf) == 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102888

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #2 from Chris Wilson <chris at chris-wilson.co.uk> ---
Hmm, I think this may have been implicitly fixed by

Author: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Date:   Tue Sep 19 17:41:28 2017 +0300

    drm/i915: Stop engines before reset

    On kbl evidence indicates that even if the hardware happily
    tells us to proceed with reset, it really isn't ready.
    Resetting a freely running batchbuffer after we have ack for readiness,
    still can cause a system hang.

    We also have similar experiences on older gens. So now
    attempt to stop engines before proceeding for reset, on all
    gens where we have a gpu reset. This has shown to improve reset
    reliability and reduce the risk of losing the machine.

    v2: Add fixme for wa (Joonas)

    Testcase: igt/prime_busy/hang-* # kbl
    Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
    Cc: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
    Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
    Acked-by: Chris Wilson <chris at chris-wilson.co.uk>
    Acked-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
    Link:
https://patchwork.freedesktop.org/patch/msgid/20170919144128.25506-1-mika.kuoppala@intel.com

Time will tell.

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