[Bug 90412] [HSW BSW SKL]igt/gem_mmap_gtt/big-copy fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90412

Kevin Strasser <kevin.strasser at linux.intel.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |ASSIGNED
         QA Contact|intel-gfx-bugs at lists.freede |kevin.strasser at linux.intel.
                   |sktop.org                   |com

--- Comment #8 from Kevin Strasser <kevin.strasser at linux.intel.com> ---
This test is mapping 2 blocks of memory which seem to be corrupting one
another. That is, if I write a page of data to index 0 of block b, I can see
the same page at index 2304 of block a, followed by 255 pages of cleared
memory. I would have to assume that this chunk of memory is associated with a
cache line. In any case,  given that smaller object sizes are working there
appears to be some limit with how much memory we can map without overlap. I'll
continue investigating.

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