drm/i915/shrinker: Wait before acquiring struct_mutex under oom

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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@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470388464-28458-8-git-send-email-chris@chris-wilson.co.uk

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Chris Wilson 2016-08-05 10:14:13 +01:00

parent 307dc25bf6

commit 5cba5be6b6

1 changed files with 9 additions and 4 deletions

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drivers/gpu/drm/i915/i915_gem_shrinker.c

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