Re: [git pull] drm: previous pull req + 1.

From: Dave Airlie
Date: Mon Jun 22 2009 - 04:30:42 EST

> >
> There is a ttm_fbdev_mmap() function in TTM that may help in this situation.
> As with the standard ttm mmap it's using fault() which means it's possible to
> move out the backing buffer object if you first reserve it and then call
> unmap_mapping_range() on the relevant fbdev address space to kill existing
> user-space mappings.

Yup I've looked at this from the fbdev pov, however I hit the same problem
with the fbcon writes happening pretty much whenever they wanted to.

It might be possible to move the fbcon around by updating screen_base, but
you'd need to have some sort of lock around the read/write functions, I
think locking on each individual read/write might be a lot of overhead.

Ideallly something analogous to the X server Prepare/Finish access hooks.


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