I wrote a driver for the SNB Xeon iMC SMBUS adapter, but it doesn't work right due to erratum BT109 (I think). To work around it, I need to keep a particular cpu package awake for a few ms when my driver is in use. Is there a good way to do this? So far I've thought of:
- pm_qos. This seems hacky and it will keep a lot more of the system awake than I need. - Hook into cpuidle to keep a single core awake. - Actually run on the target package, possibly in a kthread or workqueue, and stay busy. Ugh. - Fiddle with the package c-state limit (in MSR_PKG_CST_CONFIG_CONTROL) directly. This seems like it's asking for trouble. I'd have to coordinate with intel_idle, presumably. Any ideas/suggestions? --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
