diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_active.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_active.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c index b1fefe98f9a6..64661c41532b 100644 --- a/drivers/gpu/drm/i915/i915_active.c +++ b/drivers/gpu/drm/i915/i915_active.c @@ -9,6 +9,17 @@ #define BKL(ref) (&(ref)->i915->drm.struct_mutex) +/* + * Active refs memory management + * + * To be more economical with memory, we reap all the i915_active trees as + * they idle (when we know the active requests are inactive) and allocate the + * nodes from a local slab cache to hopefully reduce the fragmentation. + */ +static struct i915_global_active { + struct kmem_cache *slab_cache; +} global; + struct active_node { struct i915_gem_active base; struct i915_active *ref; @@ -23,7 +34,7 @@ __active_park(struct i915_active *ref) rbtree_postorder_for_each_entry_safe(it, n, &ref->tree, node) { GEM_BUG_ON(i915_gem_active_isset(&it->base)); - kfree(it); + kmem_cache_free(global.slab_cache, it); } ref->tree = RB_ROOT; } @@ -96,11 +107,11 @@ active_instance(struct i915_active *ref, u64 idx) p = &parent->rb_left; } - node = kmalloc(sizeof(*node), GFP_KERNEL); + node = kmem_cache_alloc(global.slab_cache, GFP_KERNEL); /* kmalloc may retire the ref->last (thanks shrinker)! */ if (unlikely(!i915_gem_active_raw(&ref->last, BKL(ref)))) { - kfree(node); + kmem_cache_free(global.slab_cache, node); goto out; } @@ -239,3 +250,17 @@ void i915_active_fini(struct i915_active *ref) #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "selftests/i915_active.c" #endif + +int __init i915_global_active_init(void) +{ + global.slab_cache = KMEM_CACHE(active_node, SLAB_HWCACHE_ALIGN); + if (!global.slab_cache) + return -ENOMEM; + + return 0; +} + +void __exit i915_global_active_exit(void) +{ + kmem_cache_destroy(global.slab_cache); +} |