[Intel-gfx] [PATCH 2/2] drm/i915: Disable page-faults around the fast pwrite/pread paths

[Keith Packard]

On Sun, 10 Jul 2011 11:45:29 -0700, Eric Anholt <eric at anholt.net> wrote:

> That means that I can't give users of GL pointers to GTT mappings for
> the buffer mapping API, because then I'd have to check in userland
> whether the pointer they give me for other API entrypoints is to a known
> GTT mapping before doing a pread into it.  And then I imagine cross-API
> interactions and shudder.

Yeah, it clearly has to work; it's not clear how fast it needs to
be. However, if we get the prefaulting stuff fixed, we should still be
able to hit the fast path most of the time.

-- 
keith.packard at intel.com
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