[Intel-gfx] [PATCH 08/19] drm/i915/shrinker: Wait before acquiring struct_mutex under oom

[Joonas Lahtinen]

On to, 2016-08-04 at 20:52 +0100, Chris Wilson wrote:
> We can now wait for the GPU (all engines) to become idle without
> requiring the struct_mutex. Inside the shrinker, we need to currently
> take the struct_mutex in order to purge objects and to purge the objects
> we need the GPU to be idle - causing a stall whilst we hold the
> struct_mutex. We can hide most of that stall by performing the wait
> before taking the struct_mutex and only doing essential waits for
> new rendering on objects to be freed.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Cleaner and the timeout detection should be more robust too;

Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Regards, Joonas
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation