tree: git://anongit.freedesktop.org/drm/drm-tip drm-tip
head: ae28cc6cf80a2e8cbb58f255ef7cac6b2923c98a
commit: 47f4a14297839cb4cedd725fb916a5da5eb9b5ba [/8] Merge remote-tracking
branch 'drm-intel/drm-intel-next-queued' into drm-tip
config: x86_64-rhel (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
git checkout 47f4a14297839cb4cedd725fb916a5da5eb9b5ba
# save the attached .config to linux build tree
make ARCH=x86_64
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <l...@intel.com>
Note: the drm-tip/drm-tip HEAD ae28cc6cf80a2e8cbb58f255ef7cac6b2923c98a builds
fine.
It only hurts bisectibility.
All errors (new ones prefixed by >>):
drivers/gpu/drm/i915/i915_request.c:827:1: error: redefinition of
'i915_request_await_start'
i915_request_await_start(struct i915_request *rq, struct i915_request
*signal)
^~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/i915_request.c:794:1: note: previous definition of
'i915_request_await_start' was here
i915_request_await_start(struct i915_request *rq, struct i915_request
*signal)
^~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/i915/i915_request.c:842:1: error: redefinition of
>> 'already_busywaiting'
already_busywaiting(struct i915_request *rq)
^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/i915_request.c:809:1: note: previous definition of
'already_busywaiting' was here
already_busywaiting(struct i915_request *rq)
^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/i915_request.c:809:1: warning: 'already_busywaiting'
defined but not used [-Wunused-function]
drivers/gpu/drm/i915/i915_request.c:794:1: warning:
'i915_request_await_start' defined but not used [-Wunused-function]
i915_request_await_start(struct i915_request *rq, struct i915_request
*signal)
^~~~~~~~~~~~~~~~~~~~~~~~
vim +/already_busywaiting +842 drivers/gpu/drm/i915/i915_request.c
47f4a1429 drivers/gpu/drm/i915/i915_request.c Joonas Lahtinen 2019-05-07
825
a2bc4695b drivers/gpu/drm/i915/i915_gem_request.c Chris Wilson 2016-09-09
826 static int
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
@827 i915_request_await_start(struct i915_request *rq, struct i915_request
*signal)
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
828 {
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
829 if (list_is_first(&signal->ring_link, &signal->ring->request_list))
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
830 return 0;
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
831
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
832 signal = list_prev_entry(signal, ring_link);
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
833 if (i915_timeline_sync_is_later(rq->timeline, &signal->fence))
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
834 return 0;
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
835
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
836 return i915_sw_fence_await_dma_fence(&rq->submit,
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
837 &signal->fence, 0,
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
838 I915_FENCE_GFP);
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
839 }
e766fde65 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-01
840
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
841 static intel_engine_mask_t
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
@842 already_busywaiting(struct i915_request *rq)
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
843 {
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
844 /*
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
845 * Polling a semaphore causes bus traffic, delaying other users of
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
846 * both the GPU and CPU. We want to limit the impact on others,
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
847 * while taking advantage of early submission to reduce GPU
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
848 * latency. Therefore we restrict ourselves to not using more
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
849 * than one semaphore from each source, and not using a semaphore
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
850 * if we have detected the engine is saturated (i.e. would not be
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
851 * submitted early and cause bus traffic reading an already passed
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
852 * semaphore).
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
853 *
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
854 * See the are-we-too-late? check in __i915_request_submit().
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
855 */
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
856 return rq->sched.semaphores | rq->hw_context->saturated;
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
857 }
2564fe708 drivers/gpu/drm/i915/i915_request.c Chris Wilson 2019-05-04
858
:::::: The code at line 842 was first introduced by commit
:::::: 2564fe708b580c1ef12b2b527ab6e8afe11ad444 drm/i915: Disable semaphore
busywaits on saturated systems
:::::: TO: Chris Wilson <ch...@chris-wilson.co.uk>
:::::: CC: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
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