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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #56 from Topi Pohjolainen <topi.pohjolainen at intel.com> ---
(In reply to Topi Pohjolainen from comment #54)
> I had a chat in the office with Harri. Among other things he was curious if
> this bug just happens with relatively small buffers (here 128 * 64 * 4
> bytes). I quadrupled the size to 256 * 128. The bug manifests itself but the
> probability drops a lot - I needed 156 rounds with the simplified case
> (normally I get failures in the 2nd or 3rd round).

And I just realized that I simply increased the texture and the buffer size
without actually increasing the size of the sub-region being blit. This
effectively rules out the theory about the buffer over-run due to alignment
violation. Now there was plenty extra pages available in the buffer (height ==
128). So I'm back in square one it seems.

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