diff options
| author | Xiong Zhang <xiong.y.zhang@intel.com> | 2013-07-19 13:51:24 +0800 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-07-19 09:29:26 +0200 |
| commit | 0b74b508f78cea96d0d1b47e72cc0ec7959cdc68 (patch) | |
| tree | 2bfe889b7a72eb2d736c98e334e5a5025ca49203 /drivers/gpu/drm/i915/i915_gem_execbuffer.c | |
| parent | 6286ef9b56bfc5d4f3f06ef5488e41da4480dc85 (diff) | |
drm/i915: add prefault_disable module option
prefault is stll enabled by default which prevent most of pwrite/pread/reloc
from running slow path, in order to verify these slow pathes, prefault need
to be disabled.
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
[danvet: Make checkpatch happy and bikeshed the module option help
text a bit.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_execbuffer.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_execbuffer.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index 1b58694d7be7..1734825bef34 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -759,8 +759,10 @@ validate_exec_list(struct drm_i915_gem_exec_object2 *exec, if (!access_ok(VERIFY_WRITE, ptr, length)) return -EFAULT; - if (fault_in_multipages_readable(ptr, length)) - return -EFAULT; + if (likely(!i915_prefault_disable)) { + if (fault_in_multipages_readable(ptr, length)) + return -EFAULT; + } } return 0; |