[Bug 78533] [3.15 regression] relocation value wraparound due to bios-fb preserved hole at 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78533

--- Comment #15 from Chris Wilson <chris at chris-wilson.co.uk> ---
Created attachment 99103
  --> https://bugs.freedesktop.org/attachment.cgi?id=99103&action=edit
Offsect batch buffers to prevent delta wrapping

An alternative, Daniel's suggestion. The problem, imo, is that this bakes in
assumptions about userspace, pessimising all (and fragile) rather than fixing
the pathological cases.

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