diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 2847a6b41c16..1e40eeb31f9d 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -454,6 +454,14 @@ static void vm_free_pages_release(struct i915_address_space *vm, static void vm_free_page(struct i915_address_space *vm, struct page *page) { + /* + * On !llc, we need to change the pages back to WB. We only do so + * in bulk, so we rarely need to change the page attributes here, + * but doing so requires a stop_machine() from deep inside arch/x86/mm. + * To make detection of the possible sleep more likely, use an + * unconditional might_sleep() for everybody. + */ + might_sleep(); if (!pagevec_add(&vm->free_pages, page)) vm_free_pages_release(vm, false); } |