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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #58 from Topi Pohjolainen <topi.pohjolainen at intel.com> ---
(In reply to Topi Pohjolainen from comment #57)
> Decreasing the texture and buffer size into one fourth of the original, into
> 64x32, seems to give me 100% probability of reproducing on IVB with the
> simplified test case. I'll try with the original and SKL.

More on IVB first. Using 32 x 16 x 4 = 2048 looks to be too small to reproduce.
On the other hand 32 x 32 x 4 = 4096 looks to give 100% probability. The latter
has the buffer end at the page boundary suggesting that buffer overrun due to
alignment plays some role afterall (perhaps just something more complex than
discussed before).

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