Hello, Peter.
On Wed, Aug 31, 2016 at 10:10:47PM +0300, Peter Ujfalusi wrote:
What kind of time frame are we talking about? If it really needs high priority, the right thing to do would be using a WQ_HIGHPRI workqueue.
In order to be tune the performance and power saving during audio playback lower is better, but consistency matters more to be able have stable system. I have some latency compensation in the code so it could tolerate some drift, but big spikes can cause the codec to go underflow and we can not recover from that w/o hard reset of the codec.
Gees, that's a brutal failure mode.
I do believe that Linux got much better over the years since I wrote the dac33 driver, so I'm fine with the move to system_wq. The most problematic mode (I think it was MODE7LP or smthing) is not upstream so this change should not break audio on the n9/n950.
Thanks for the explanation!