If we discard a buffer due to memory pressure, also release its alloted mmap address space. As it may be sometime before userspace wakes up and notices that it has buffers to purge from its cache, we may waste valuable address space on unusable objects for a period of time. Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk> --- drivers/gpu/drm/i915/i915_gem.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 19a06c2..4733704 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1543,6 +1543,9 @@ i915_gem_object_truncate(struct drm_i915_gem_object *obj) inode = obj->base.filp->f_path.dentry->d_inode; shmem_truncate_range(inode, 0, (loff_t)-1); + if (obj->base.map_list.map) + drm_gem_free_mmap_offset(&obj->base); + obj->madv = __I915_MADV_PURGED; } -- 1.7.9.1
