Possible, but I would rather guess that this doesn't work because the IB test runs into a deadlock situation and so the GPU reset never fully completes.
Can you reproduce the problem? If you want to make GPU resets more reliable I would rather suggest to remove the ring lock dependency. Then we should try to give all the fence wait functions a (reliable) timeout and move reset handling a layer up into the ioctl functions. But for this you need to rip out the old PM code first. Christian. Marek Olšák <mar...@gmail.com> schrieb: >I'm afraid signalling the fences with an IB test is not reliable. > >Marek > >On Wed, Oct 2, 2013 at 3:52 PM, Christian König <deathsim...@vodafone.de> >wrote: >> NAK, after recovering from a lockup the first thing we do is signalling all >> remaining fences with an IB test. >> >> If we don't recover we indeed signal all fences manually. >> >> Signalling all fences regardless of the outcome of the reset creates >> problems with both types of partial resets. >> >> Christian. >> >> Marek Olšák <mar...@gmail.com> schrieb: >> >>>From: Marek Olšák <marek.ol...@amd.com> >>> >>>After a lockup, fences are not signalled sometimes, causing >>>the GEM_WAIT_IDLE ioctl to never return, which sometimes results >>>in an X server freeze. >>> >>>This fixes only one of many deadlocks which can occur during a lockup. >>> >>>Signed-off-by: Marek Olšák <marek.ol...@amd.com> >>>--- >>> drivers/gpu/drm/radeon/radeon_device.c | 5 +++++ >>> 1 file changed, 5 insertions(+) >>> >>>diff --git a/drivers/gpu/drm/radeon/radeon_device.c >>>b/drivers/gpu/drm/radeon/radeon_device.c >>>index 841d0e0..7b97baa 100644 >>>--- a/drivers/gpu/drm/radeon/radeon_device.c >>>+++ b/drivers/gpu/drm/radeon/radeon_device.c >>>@@ -1552,6 +1552,11 @@ int radeon_gpu_reset(struct radeon_device *rdev) >>> radeon_save_bios_scratch_regs(rdev); >>> /* block TTM */ >>> resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev); >>>+ >>>+ mutex_lock(&rdev->ring_lock); >>>+ radeon_fence_driver_force_completion(rdev); >>>+ mutex_unlock(&rdev->ring_lock); >>>+ >>> radeon_pm_suspend(rdev); >>> radeon_suspend(rdev); >>> >>>-- >>>1.8.1.2 >>> >>>_______________________________________________ >>>dri-devel mailing list >>>dri-devel@lists.freedesktop.org >>>http://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
