[Bug 107770] [CI][DRMTIP] igt at gem_exec_parallel@blt-fds - fail - Failed assertion: map[i] == i

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107770

Martin Peres <martin.peres at free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #2 from Martin Peres <martin.peres at free.fr> ---
(In reply to Chris Wilson from comment #1)
> Same suspect as
> 
> commit 70b73f9ac113983f9c7db9887447f1344ac5b69b
> Author: Chris Wilson <chris at chris-wilson.co.uk>
> Date:   Thu Aug 30 17:10:42 2018 +0100
> 
>     drm/i915/ringbuffer: Delay after invalidating gen6+ xcs
>     
>     During stress testing of full-ppgtt (on Baytrail at least), we found
>     that the invalidation around a context/mm switch was insufficient (writes
>     would go astray). Adding a second MI_FLUSH_DW barrier prevents this, but
>     it is unclear as to whether this is merely a delaying tactic or if it is
>     truly serialising with the TLB invalidation. Either way, it is
>     empirically required.
>     
>     v2: Avoid the loop for readability;
>     
>     Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107715
>     References: https://bugs.freedesktop.org/show_bug.cgi?id=107759
>     Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
>     Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
>     Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
>     Cc: Matthew Auld <matthew.william.auld at gmail.com>
>     Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
>     Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>     Link:
> https://patchwork.freedesktop.org/patch/msgid/20180830161042.29193-1-
> chris at chris-wilson.co.uk
> 
> As with the others, lets see what happens now.

Looks like it fixed it! It uised to happen almost every run, and now nothing in
10 runs. Closing!

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