On Mon, Jul 02, 2018 at 01:24:40PM +0300, Ville Syrjälä wrote:
On Mon, Jul 02, 2018 at 10:12:21AM +0200, Daniel Vetter wrote:
This interface allows pretty much unlimited kernel memory allocations, which isn't all that great. But we allow that anyway for any drm master client (through pinning display buffers and stuff, at least for UMA gpus),
At least on i915 memory used by pinned display buffers has some kind of upper bound based on the number of planes+max fb size and/or ggtt size.
Anyways, patch makes sense so Reviewed-by: Ville Syrjälä ville.syrjala@linux.intel.com
CI is unhappy about it because it breaks the testcase. And on second thought with stuff like drm leases we allow rather unpriviledge things to be drm master, so this isn't helping all that much really. Also, cgroups should be able to limit these kernel allocations - we only ever do this in process context.
Decided to drop this on the floor instead. -Daniel
so just limiting it to the active master seems like a reasonable stopgap measure.
Fixes: e2f5d2ea479b ("drm/mode: Add user blob-creation ioctl") Cc: Daniel Stone daniels@collabora.com Cc: Ville Syrjälä ville.syrjala@linux.intel.com Cc: Michel Dänzer michel@daenzer.net Signed-off-by: Daniel Vetter daniel.vetter@intel.com
drivers/gpu/drm/drm_ioctl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index c148eb3be8c2..dc740c381f9e 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -656,8 +656,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = { DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATEPROPBLOB, drm_mode_createblob_ioctl, DRM_UNLOCKED),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROYPROPBLOB, drm_mode_destroyblob_ioctl, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATEPROPBLOB, drm_mode_createblob_ioctl, DRM_MASTER|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROYPROPBLOB, drm_mode_destroyblob_ioctl, DRM_MASTER|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_CREATE, drm_syncobj_create_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
-- 2.18.0
-- Ville Syrjälä Intel