In commit 5763ff04dc4e ("drm/i915: Avoid GPU stalls from kswapd") we
stopped direct reclaim and kswapd from triggering GPU/client stalls
whilst running (by restricting the objects they could reap to be idle).However with abusive GPU usage, it becomes quite easy to starve kswapd of memory and prevent it from making forward progress towards obtaining enough free memory (thus driving the system closer to swap exhaustion). Relax the previous restriction to allow kswapd (but not direct reclaim) to stall the device whilst reaping purgeable pages. v2: Also acquire the rpm wakelock to allow kswapd to unbind buffers. Signed-off-by: Chris Wilson <[email protected]> Cc: Joonas Lahtinen <[email protected]> --- drivers/gpu/drm/i915/i915_gem_shrinker.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_shrinker.c b/drivers/gpu/drm/i915/i915_gem_shrinker.c index 03e08e1853e6..5fc1ddc268fb 100644 --- a/drivers/gpu/drm/i915/i915_gem_shrinker.c +++ b/drivers/gpu/drm/i915/i915_gem_shrinker.c @@ -324,6 +324,15 @@ i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) sc->nr_to_scan - freed, I915_SHRINK_BOUND | I915_SHRINK_UNBOUND); + if (freed < sc->nr_to_scan && current_is_kswapd()) { + intel_runtime_pm_get(dev_priv); + freed += i915_gem_shrink(dev_priv, + sc->nr_to_scan - freed, + I915_SHRINK_ACTIVE | + I915_SHRINK_BOUND | + I915_SHRINK_UNBOUND); + intel_runtime_pm_put(dev_priv); + } shrinker_unlock(dev_priv, unlock); -- 2.11.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
