Commit 59b640870c1703097a9f48c1ed0a96aa548e8675
2011-07-30T13:28:25
So we can pthread cancel a stuck thread, but can't pthread join it. And we can't tq freeze the old queue or we could hang here. And we need to re-initialise all the opencl contexts so send a test command and if it succeeds reinit the card.