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| author | Chris Wilson | 2018-03-30 15:18:01 +0200 |
|---|---|---|
| committer | Chris Wilson | 2018-04-06 11:42:18 +0200 |
| commit | 028666793a0291b63eb61bae7252345821326a1b (patch) | |
| tree | 5f5a66e6bb55a695d786ed9cf6e75dfb22d47712 /drivers/gpu/drm/i915/i915_drv.c | |
| parent | drm/i915/audio: Fix audio enumeration issue on BXT (diff) | |
| download | kernel-qcow2-linux-028666793a0291b63eb61bae7252345821326a1b.tar.gz kernel-qcow2-linux-028666793a0291b63eb61bae7252345821326a1b.tar.xz kernel-qcow2-linux-028666793a0291b63eb61bae7252345821326a1b.zip | |
drm/i915/selftests: Avoid repeatedly harming the same innocent context
We don't handle resetting the kernel context very well, or presumably any
context executing its breadcrumb commands in the ring as opposed to the
batchbuffer and flush. If we trigger a device reset twice in quick
succession while the kernel context is executing, we may end up skipping
the breadcrumb. This is really only a problem for the selftest as
normally there is a large interlude between resets (hangcheck), or we
focus on resetting just one engine and so avoid repeatedly resetting
innocents.
Something to try would be a preempt-to-idle to quiesce the engine before
reset, so that innocent contexts would be spared the reset.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
CC: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180330131801.18327-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index d354627882e3..684060ed8db6 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1886,6 +1886,8 @@ void i915_reset(struct drm_i915_private *i915) int ret; int i; + GEM_TRACE("flags=%lx\n", error->flags); + might_sleep(); lockdep_assert_held(&i915->drm.struct_mutex); GEM_BUG_ON(!test_bit(I915_RESET_BACKOFF, &error->flags)); @@ -2016,6 +2018,7 @@ int i915_reset_engine(struct intel_engine_cs *engine, const char *msg) struct i915_request *active_request; int ret; + GEM_TRACE("%s flags=%lx\n", engine->name, error->flags); GEM_BUG_ON(!test_bit(I915_RESET_ENGINE + engine->id, &error->flags)); active_request = i915_gem_reset_prepare_engine(engine); |