diff options
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gem_shrinker.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem_shrinker.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c index a4d85955cbd98..1187ecf9d6470 100644 --- a/drivers/gpu/drm/msm/msm_gem_shrinker.c +++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c @@ -9,12 +9,29 @@ #include "msm_gpu.h" #include "msm_gpu_trace.h" +/* Default disabled for now until it has some more testing on the different + * iommu combinations that can be paired with the driver: + */ +bool enable_eviction = false; +MODULE_PARM_DESC(enable_eviction, "Enable swappable GEM buffers"); +module_param(enable_eviction, bool, 0600); + +static bool can_swap(void) +{ + return enable_eviction && get_nr_swap_pages() > 0; +} + static unsigned long msm_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { struct msm_drm_private *priv = container_of(shrinker, struct msm_drm_private, shrinker); - return priv->shrinkable_count; + unsigned count = priv->shrinkable_count; + + if (can_swap()) + count += priv->evictable_count; + + return count; } static bool @@ -32,6 +49,17 @@ purge(struct msm_gem_object *msm_obj) return true; } +static bool +evict(struct msm_gem_object *msm_obj) +{ + if (is_unevictable(msm_obj)) + return false; + + msm_gem_evict(&msm_obj->base); + + return true; +} + static unsigned long scan(struct msm_drm_private *priv, unsigned nr_to_scan, struct list_head *list, bool (*shrink)(struct msm_gem_object *msm_obj)) @@ -104,6 +132,16 @@ msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) if (freed > 0) trace_msm_gem_purge(freed << PAGE_SHIFT); + if (can_swap() && freed < sc->nr_to_scan) { + int evicted = scan(priv, sc->nr_to_scan - freed, + &priv->inactive_willneed, evict); + + if (evicted > 0) + trace_msm_gem_evict(evicted << PAGE_SHIFT); + + freed += evicted; + } + return (freed > 0) ? freed : SHRINK_STOP; } |