[Nouveau] [Bug 37445] Nouveau regularly reports the TRAP_VFETCH FAULT errors.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=37445

--- Comment #2 from Christoph Bumiller <e0425955 at student.tuwien.ac.at> 2011-05-22 02:17:03 PDT ---
VFETCH means "vertex fetch", so it's caused by vertex fetches / reads of vertex
data by PGRAPH.

One possible reason is that some app asks for vertices outside the limit of a
vertex buffer (for whatever reason - could be app bug, driver bug or mesa bug),
which go to a special memory area, NV50_3D_VERTEX_RUNOUT_ADDRESS, which isn't
initialized and thus would cause VM faults at address 0.

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