On Wed, Jun 12, 2013 at 11:11:21AM -0700, Larry Baker wrote: > The processor errata is operating system agnostic. I suspect the BIOS > workaround they envision would be a feature in the BIOS to limit the > choice of C states to be used. The IBM BIOS has such a setting, and > the default value is to completely disable C states. However, > intel_idle ignores the BIOS setting. No, the BIOS workaround will typically be to program the memory controller such that the problem isn't triggered. If you're having latency-related issues then the appropriate fix is to use the pm_qos interface that's present in RHEL 6 and the upstream kernel, and you can do so in RHEL using the ktune command. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
