SRU Justification Impact: Xen instances do not run at full speed, nor do they implement C states.
Patch description: Backport and cherrypick a series from upstream xen/apic: Return the APIC ID (and version) for CPU 0. xen/cpufreq: Disable the cpu frequency scaling drivers from loading. xen/acpi: Remove the WARN's as they just create noise. xen/acpi: Fix Kconfig dependency on CPU_FREQ xen/acpi-processor: Do not depend on CPU frequency scaling drivers. xen/acpi-processor: C and P-state driver that uploads said data to hyperv provide disable_cpufreq() function to disable the API. UBUNTU: [Config] CONFIG_XEN_ACPI_PROCESSOR=y See discussion at https://lists.ubuntu.com/archives/kernel- team/2012-May/020267.html -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/898112 Title: Xen performance issue: backport acpi-cpufreq.v4 branch to 3.2 kernel for Precise To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/898112/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
