From e1e9db2ca79575b8d6b4b5891194bb29c630c42d Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Fri, 27 May 2016 11:16:28 -0400 Subject: drm/msm: wire up vmap shrinker Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/msm_gem_shrinker.c | 40 ++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) (limited to 'drivers/gpu/drm/msm/msm_gem_shrinker.c') diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c index 70fba9baddde..283d2841ba58 100644 --- a/drivers/gpu/drm/msm/msm_gem_shrinker.c +++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c @@ -100,6 +100,42 @@ msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) return freed; } +static int +msm_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) +{ + struct msm_drm_private *priv = + container_of(nb, struct msm_drm_private, vmap_notifier); + struct drm_device *dev = priv->dev; + struct msm_gem_object *msm_obj; + unsigned unmapped = 0; + bool unlock; + + if (!msm_gem_shrinker_lock(dev, &unlock)) + return NOTIFY_DONE; + + list_for_each_entry(msm_obj, &priv->inactive_list, mm_list) { + if (is_vunmapable(msm_obj)) { + msm_gem_vunmap(&msm_obj->base); + /* since we don't know any better, lets bail after a few + * and if necessary the shrinker will be invoked again. + * Seems better than unmapping *everything* + */ + if (++unmapped >= 15) + break; + } + } + + if (unlock) + mutex_unlock(&dev->struct_mutex); + + *(unsigned long *)ptr += unmapped; + + if (unmapped > 0) + pr_info_ratelimited("Purging %u vmaps\n", unmapped); + + return NOTIFY_DONE; +} + /** * msm_gem_shrinker_init - Initialize msm shrinker * @dev_priv: msm device @@ -113,6 +149,9 @@ void msm_gem_shrinker_init(struct drm_device *dev) priv->shrinker.scan_objects = msm_gem_shrinker_scan; priv->shrinker.seeks = DEFAULT_SEEKS; WARN_ON(register_shrinker(&priv->shrinker)); + + priv->vmap_notifier.notifier_call = msm_gem_shrinker_vmap; + WARN_ON(register_vmap_purge_notifier(&priv->vmap_notifier)); } /** @@ -124,5 +163,6 @@ void msm_gem_shrinker_init(struct drm_device *dev) void msm_gem_shrinker_cleanup(struct drm_device *dev) { struct msm_drm_private *priv = dev->dev_private; + WARN_ON(unregister_vmap_purge_notifier(&priv->vmap_notifier)); unregister_shrinker(&priv->shrinker); } -- cgit v1.2.3