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Some clients, such as mesa, may only emit minimal incremental batches that rely on the logical context state from previous batches. They know that recovery is impossible after a hang as their required GPU state is lost, and that each in flight and subsequent batch will hang (resetting the context image back to default perpetuating the problem). To avoid getting into the state in the first place, we can allow clients to opt out of automatic recovery and elect to ban any guilty context following a hang. This prevents the continual stream of hangs and allows the client to recreate their context and rebuild the state from scratch. v2: Prefer calling it recoverable rather than unrecoverable. References: https://lists.freedesktop.org/archives/mesa-dev/2019-February/215431.html Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Kenneth Graunke <kenneth@whitecape.org> Cc: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Acked-by: Kenneth Graunke <kenneth@whitecape.org> # for mesa Link: https://patchwork.freedesktop.org/patch/msgid/20190218105821.17293-1-chris@chris-wilson.co.uk |
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