[Bug 106848] [GM45] igt at gem_mmap_gtt@basic-small-bo-tiledx - fail - Failed assertion: memcmp(ptr , tiled_pattern, PAGE_SIZE) == 0 (edit)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106848

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #15 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit a0f2d23b7d3d4226a0a7637a9240bfa86f08c1d3 (HEAD, upstream/master)
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Jun 8 17:29:46 2018 +0100

    igt/gem_mmap_gtt: Checking tiling pattern requires known swizzling

    As the swizzling is baked into the tiling pattern, the swizzling has to
    be consistent across the entire GTT mmap for our tests to work. However,
    under L-shaped memory configurations on older architectures, the
    swizzling varied depending on which region the page found itself in --
    invalidating our assumptions and ability to predict the tiling pattern.

    Reported-by: Adric Blake <promarbler14 at gmail.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106848
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

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