From: Mika Kuoppala <mika.kuoppala@linux.intel.com> To: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org Subject: Re: [PATCH] drm/i915/gt: Only drop heartbeat.systole if the sole owner Date: Wed, 06 Nov 2019 16:40:27 +0200 [thread overview] Message-ID: <87d0e5nk4k.fsf@gaia.fi.intel.com> (raw) In-Reply-To: <20191106133129.17732-1-chris@chris-wilson.co.uk> Chris Wilson <chris@chris-wilson.co.uk> writes: > Mika spotted that only using cancel_delayed_work() could mean that we > attempted to clear the heartbeat.systole while the worker was still > running. Rectify the situation by only touching the systole from outside > the worker if we suceeded in cancelling the worker before it could run. succeeded > The worker is expected to clean up by itself upon idling. > > Reported-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> > Fixes: 058179e72e09 ("drm/i915/gt: Replace hangcheck by heartbeats") > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> > Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> > --- > drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c > index 5051f304705b..06aa14c7aa8c 100644 > --- a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c > +++ b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c > @@ -141,8 +141,8 @@ void intel_engine_unpark_heartbeat(struct intel_engine_cs *engine) > > void intel_engine_park_heartbeat(struct intel_engine_cs *engine) > { > - cancel_delayed_work(&engine->heartbeat.work); > - i915_request_put(fetch_and_zero(&engine->heartbeat.systole)); > + if (cancel_delayed_work(&engine->heartbeat.work)) > + i915_request_put(fetch_and_zero(&engine->heartbeat.systole)); We don't arm in park path so this should do the trick. Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> > } > > void intel_engine_init_heartbeat(struct intel_engine_cs *engine) > -- > 2.24.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
WARNING: multiple messages have this Message-ID (diff)
From: Mika Kuoppala <mika.kuoppala@linux.intel.com> To: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org Subject: Re: [Intel-gfx] [PATCH] drm/i915/gt: Only drop heartbeat.systole if the sole owner Date: Wed, 06 Nov 2019 16:40:27 +0200 [thread overview] Message-ID: <87d0e5nk4k.fsf@gaia.fi.intel.com> (raw) Message-ID: <20191106144027.bZHNL_InedwkhpQnUZKho5O2SecyyMiJ_kEiicQwstI@z> (raw) In-Reply-To: <20191106133129.17732-1-chris@chris-wilson.co.uk> Chris Wilson <chris@chris-wilson.co.uk> writes: > Mika spotted that only using cancel_delayed_work() could mean that we > attempted to clear the heartbeat.systole while the worker was still > running. Rectify the situation by only touching the systole from outside > the worker if we suceeded in cancelling the worker before it could run. succeeded > The worker is expected to clean up by itself upon idling. > > Reported-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> > Fixes: 058179e72e09 ("drm/i915/gt: Replace hangcheck by heartbeats") > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> > Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> > --- > drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c > index 5051f304705b..06aa14c7aa8c 100644 > --- a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c > +++ b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c > @@ -141,8 +141,8 @@ void intel_engine_unpark_heartbeat(struct intel_engine_cs *engine) > > void intel_engine_park_heartbeat(struct intel_engine_cs *engine) > { > - cancel_delayed_work(&engine->heartbeat.work); > - i915_request_put(fetch_and_zero(&engine->heartbeat.systole)); > + if (cancel_delayed_work(&engine->heartbeat.work)) > + i915_request_put(fetch_and_zero(&engine->heartbeat.systole)); We don't arm in park path so this should do the trick. Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> > } > > void intel_engine_init_heartbeat(struct intel_engine_cs *engine) > -- > 2.24.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next prev parent reply other threads:[~2019-11-06 14:40 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-11-06 13:31 [PATCH] drm/i915/gt: Only drop heartbeat.systole if the sole owner Chris Wilson 2019-11-06 13:31 ` [Intel-gfx] " Chris Wilson 2019-11-06 14:40 ` Mika Kuoppala [this message] 2019-11-06 14:40 ` Mika Kuoppala 2019-11-06 16:25 ` ✓ Fi.CI.BAT: success for " Patchwork 2019-11-06 16:25 ` [Intel-gfx] " Patchwork 2019-11-07 14:56 ` ✓ Fi.CI.IGT: " Patchwork 2019-11-07 14:56 ` [Intel-gfx] " Patchwork
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