GEM-related desktop sluggishness due to linear-time arch_get_unmapped_area_topdown()

r6144 rainy6144 at
Tue Mar 29 07:44:24 PDT 2011

在 2011-03-29二的 10:22 -0400,Jerome Glisse写道:

> Killer solution would be to have no mapping and a decent
> upload/download ioctl that can take userpage.

Doesn't this sound like GEM's read/write interface implemented by e.g.
the i915 driver?  But if I understand correctly, a mmap-like interface
should still be necessary if we want to implement e.g. glMapBuffer()
without extra copying.


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