[Intel-gfx] [PATCH 3/8] drm/i915: evict VM instead of everything

[Chris Wilson]

On Fri, Aug 30, 2013 at 04:43:56PM -0700, Ben Widawsky wrote:
> When reserving objects during execbuf, it is possible to come across an
> object which will not fit given the current fragmentation of the address
> space. We do not have any defragment in drm_mm, so the strategy is to
> instead evict everything, and reallocate objects.
> 
> With the upcoming addition of multiple VMs, there is no point to evict
> everything since doing so is overkill for the specific case mentioned
> above.
> 
> Recommended-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> Signed-off-by: Ben Widawsky <ben at bwidawsk.net>

This loses the ENOSPC notification, and the tracepoints. I've just seen you
add tracepoints later..

I'm pretty certain this will be caught by an extra pass through reserve,
and probably worth it for the simplification. Fortunately, we do have
i-g-t coverage for this.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre