[Bug 91926] [SKL bisected] texsubimage pbo intermittent failures

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91926

--- Comment #52 from Topi Pohjolainen <topi.pohjolainen at intel.com> ---
I hacked intel_buffer_objects.c::alloc_buffer_object() to pass extra 4096 bytes
to the size given to drm_intel_bo_alloc(). This seems to prevent the failure
also (at least I get 200 test rounds without pixel failures).

I used a hack since this interface (glBufferData()) has no notion of width or
height and therefore preventing cleaner solution.


I would like to note that without knowing the algorithm for the cache handling,
these findings are not yet conclusive - it is still possible that they are once
again hiding the real explanation.

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