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SubjectRe: DRM lock ordering fix series
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Eric Anholt <eric@anholt.net> writes:

> Here's hopefully the final attempt at the lock ordering fix for GEM. The
> problem was introduced in .29 with the GTT mapping support. We hashed out
> a few potential fixes on the mailing list and at OSTS. Peter's plan was
> to use get_user_pages, but it has significant CPU overhead (10% cost to text
> rendering, though part of that is due to some dumb userland code. But it's
> dumb userland code we're all running).


You are aware that there is a fast path now (get_user_pages_fast) which
is significantly faster? (but has some limitations)

-Andi

--
ak@linux.intel.com -- Speaking for myself only.


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